II. User's Guide to the 2MASS All-Sky Data Release

3. XSC Parameters

a. Column Descriptions

The XSC contains 389 columns of information per source (most of which is photometry.) Because extended sources are much more complicated than a point source, it takes many more parameters to characterize them. Some parameters are required to describe the spatial extent of a source, and many more are required to characterize the photometry. In addition to a number of standard measures of photometry, the xsc also reports the magnitude as measured in a number of different fixed-size apertures. The columns are described in the tables below. We have separated the columns according to their basic function and utility.

Photometry algorithms and performance can be found here: Large Aperture Photometry: Profile Fitting, Isophotal & Total Mags.
The XSC FAQ and Primer is here: How to Use the 2MASS XSC -- FAQ Sheet.

A. Name and Position Information

column Parameter Name View Format Units Description
1 jdate L 13.4f day Julian date of the source measurement accurate to ±3 minutes. This value is the mean Julian date of the scan observation in which this source falls. For a more precise value of Julian date for this source, see the jdate entry in the PSC using the pts_key index as a cross-reference.
--- Position Information
2 designation S 17s - Source designation formed from sexigesimal coordinates.
This is the object sequence designation, or object "name" as specified by the IAU recommendations on source nomenclature. It is derived from the J2000 sexigesimal coordinates of the source and has the form HHMMSSSS+/-DDMMSSS, where HH are the hours of right ascension, MM the RA minutes and SSS are the deci-seconds of RA. DD are the degrees in declination, MM are DEC minutes and SS the declination seconds. Note that both the RA deci-seconds of time and DEC seconds of arc are truncated rather than rounded, per the IAU recommendation. The full naming convention for 2MASS All-Sky Release sources has the form "2MASX Jhhmmssss+ddmmsss[ABC...]", where "2MASX" indicates that the source is from the All-Sky XSC, "J" indicates the position is J2000, and the optional trailing letters are used to distinguish sources with otherwise duplicate names. The "2MASX J" prefix is not listed explicitly in the designation column.
3 ra S 10.6f deg Right ascension (J2000 decimal deg) based on peak pixel.
4 dec/decl S 10.6f deg Declination (J2000 decimal deg) based on peak pixel.
5 sup_ra L 10.6f deg Super-coadd centroid RA (J2000 decimal deg).
6 sup_dec L 10.6f deg Super-coadd centroid Dec (J2000 decimal deg).
7 glon L 7.3f deg Galactic longitude (decimal deg) based on peak pixel. Galactic coordinate for 2MASS source derived by precessing reconstructed ra and dec to B1950, and performing rotational transformation into lII, bII coordinate system. This coordinate should not be used as an astrometric reference because it has been rounded to 0.001 deg.
8 glat L 7.3f deg Galactic latitude (decimal deg) based on peak pixel. Galactic coordinate for 2MASS source derived by precessing reconstructed ra and dec to B1950, and performing rotational transformation into lII, bII coordinate system. This coordinate should not be used as an astrometric reference because it has been rounded to 0.001 deg.
9 density L 5.2f - Coadd log(density) of stars with k<14 mag. See Stellar Number Density Metric: "density".

B. Standard (recommended) Photometry: Isophotal Apertures Based on the Ks 20 mag/arcsec^2 Elliptical Isophote, and 2-D Orientation

column Parameter Name View Format Units Description
--- Isophotal photom at 20 using K fiducial ellip ap
10 r_k20fe S 6.1f arcsec 20mag/sq." isophotal K fiducial ell. ap. semi-major axis.
"Fiducial" apertures are determined for each type of total and isophotal photometry measurements as described in the GALWORKS SDS. Essentially, they are used to make mag measurements for each type of photometry with the same aperture size in all three bands. The fiducial band for the total Kron photometry and 20mag/sq." isophotal photometry is the K band, and for the 21mag/sq." isophotal photometry it is the J band.
See Large Aperture Photometry: Profile Fitting, Isophotal & Total Mags.
11 j_m_k20fe S 6.3f mag J 20mag/sq." isophotal fiducial ell. ap. magnitude.
See Large Aperture Photometry: Profile Fitting, Isophotal & Total Mags.
12 j_msig_k20fe S 5.3f mag J 1-sigma uncertainty in 20mag/sq." iso.fid.ell.mag.
13 j_flg_k20fe S 1hd - J confusion flag for 20mag/sq." iso. fid. ell. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
14 h_m_k20fe S 6.3f mag H 20mag/sq." isophotal fiducial ell. ap. magnitude.
See Large Aperture Photometry: Profile Fitting, Isophotal & Total Mags.
15 h_msig_k20fe S 5.3f mag H 1-sigma uncertainty in 20mag/sq." iso.fid.ell.mag.
16 h_flg_k20fe S 1hd - H confusion flag for 20mag/sq." iso. fid. ell. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
17 k_m_k20fe S 6.3f mag K 20mag/sq." isophotal fiducial ell. ap. magnitude.
See Large Aperture Photometry: Profile Fitting, Isophotal & Total Mags.
18 k_msig_k20fe S 5.3f mag K 1-sigma uncertainty in 20mag/sq." iso.fid.ell.mag.
19 k_flg_k20fe S 1hd - K confusion flag for 20mag/sq." iso. fid. ell. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
--- Elliptical Isophotal Orientation
20 r_3sig L 5.1f arcsec 3-sigma K isophotal semi-major axis.
21 j_ba L 5.3f - J minor/major axis ratio fit to the 3-sigma isophote.
22 j_phi L 3hd deg J angle to 3-sigma major axis (E of N).
23 h_ba L 5.3f - H minor/major axis ratio fit to the 3-sigma isophote.
24 h_phi L 3hd deg H angle to 3-sigma major axis (E of N).
25 k_ba S 5.3f - K minor/major axis ratio fit to the 3-sigma isophote.
26 k_phi S 3hd deg K angle to 3-sigma major axis (E of N).
27 sup_r_3sig L 5.1f arcsec Super-coadd 3-sigma isophotal semi-major axis radius.
28 sup_ba S 5.3f - Minor/major axis ratio fit to 3-sig. super-coadd isophote.
29 sup_phi S 3hd deg Super-coadd angle to major axis (E of N).

C. Large Apertures, including Kron and Total Versions, and Surface Brightness

column Parameter Name View Format Units Description
--- Photometry using Kron elliptical aperture
30 r_fe L 6.1f arcsec K fiducial Kron elliptical aperture semi-major axis.
"Fiducial" apertures are determined for each type of total and isophotal photometry measurements as described in the GALWORKS SDS. Essentially, they are used to make mag measurements for each type of photometry with the same aperture size in all three bands. The fiducial band for the total Kron photometry and 20mag/sq." isophotal photometry is the K band, and for the 21mag/sq." isophotal photometry it is the J band.
See Large Aperture Photometry: Profile Fitting, Isophotal & Total Mags.
31 j_m_fe L 6.3f mag J fiducial Kron elliptical aperture magnitude.
See Large Aperture Photometry: Profile Fitting, Isophotal & Total Mags.
32 j_msig_fe L 5.3f mag J 1-sigma uncertainty in fiducial Kron ell. mag.
33 j_flg_fe L 1hd - J confusion flag for fiducial Kron ell. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
34 h_m_fe L 6.3f mag H fiducial Kron elliptical aperture magnitude.
See Large Aperture Photometry: Profile Fitting, Isophotal & Total Mags.
35 h_msig_fe L 5.3f mag H 1-sigma uncertainty in fiducial Kron ell. mag.
36 h_flg_fe L 1hd - H confusion flag for fiducial Kron ell. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
37 k_m_fe L 6.3f mag K fiducial Kron ell. mag aperture magnitude.
See Large Aperture Photometry: Profile Fitting, Isophotal & Total Mags.
38 k_msig_fe L 5.3f mag K 1-sigma uncertainty in fiducial Kron ell. mag.
39 k_flg_fe L 1hd - K confusion flag for fiducial Kron ell. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
--- Total Photometry from extrapolation of fit to radial profile
40 r_ext S 7.2f arcsec extrapolation/total radius.
See Large Aperture Photometry: Profile Fitting, Isophotal & Total Mags.
41 j_m_ext S 6.3f mag J mag from fit extrapolation.
See Large Aperture Photometry: Profile Fitting, Isophotal & Total Mags.
42 j_msig_ext L 5.3f mag J 1-sigma uncertainty in mag from fit extrapolation.
43 j_pchi S 6.3f - J chi^2 of fit to rad. profile (LCSB: alpha scale len).
If the source is not an LCSB, these fields contain the reduced chi-squared values for each band of the modified exponential fits to the elliptical radial profiles, used for extrapolation and half-light estimates. For LCSBs, they contain the alpha scale lengths.
44 h_m_ext S 6.3f mag H mag from fit extrapolation.
See Large Aperture Photometry: Profile Fitting, Isophotal & Total Mags.
45 h_msig_ext S 5.3f mag H 1-sigma uncertainty in mag from fit extrapolation.
46 h_pchi L 6.3f - H chi^2 of fit to rad. profile (LCSB: alpha scale len).
If the source is not an LCSB, these fields contain the reduced chi-squared values for each band of the modified exponential fits to the elliptical radial profiles, used for extrapolation and half-light estimates. For LCSBs, they contain the alpha scale lengths.
47 k_m_ext S 6.3f mag K mag from fit extrapolation.
See Large Aperture Photometry: Profile Fitting, Isophotal & Total Mags.
48 k_msig_ext S 5.3f mag K 1-sigma uncertainty in mag from fit extrapolation.
49 k_pchi L 6.3f - K chi^2 of fit to rad. profile (LCSB: alpha scale len).
If the source is not an LCSB, these fields contain the reduced chi-squared values for each band of the modified exponential fits to the elliptical radial profiles, used for extrapolation and half-light estimates. For LCSBs, they contain the alpha scale lengths.
--- Effective radii and mean surface brightness
50 j_r_eff L 6.2f arcsec J half-light (integrated half-flux point) radius.
See Half-Light "Effective" Aperture & Concentration Index
Beware the circularizing effect of the PSF on small galaxies. See The 2MASS Beam.
51 j_mnsurfb_eff L 5.2f mag J mean surface brightness at the half-light radius.
See Half-Light "Effective" Aperture & Concentration Index
Beware the circularizing effect of the PSF on small galaxies. See The 2MASS Beam.
52 h_r_eff L 6.2f arcsec H half-light (integrated half-flux point) radius.
See Half-Light "Effective" Aperture & Concentration Index
Beware the circularizing effect of the PSF on small galaxies. See The 2MASS Beam.
53 h_mnsurfb_eff L 5.2f mag H mean surface brightness at the half-light radius.
See Half-Light "Effective" Aperture & Concentration Index
Beware the circularizing effect of the PSF on small galaxies. See The 2MASS Beam.
54 k_r_eff L 6.2f arcsec K half-light (integrated half-flux point) radius.
See Half-Light "Effective" Aperture & Concentration Index
Beware the circularizing effect of the PSF on small galaxies. See The 2MASS Beam.
55 k_mnsurfb_eff L 5.2f mag K mean surface brightness at the half-light radius.
See Half-Light "Effective" Aperture & Concentration Index
Beware the circularizing effect of the PSF on small galaxies. See The 2MASS Beam.
56 j_con_indx L 5.2f - J concentration index r_75%/r_25%.
The concentration index for the galaxy in each band is the ratio of the radii which contain 75% and 25% of the total light, r_75%/r_25%.
See Half-Light "Effective" Aperture & Concentration Index
Beware the circularizing effect of the PSF on small galaxies. See The 2MASS Beam.
57 h_con_indx L 5.2f - H concentration index r_75%/r_25%.
The concentration index for the galaxy in each band is the ratio of the radii which contain 75% and 25% of the total light, r_75%/r_25%.
See Half-Light "Effective" Aperture & Concentration Index
Beware the circularizing effect of the PSF on small galaxies. See The 2MASS Beam.
58 k_con_indx L 5.2f - K concentration index r_75%/r_25%.
The concentration index for the galaxy in each band is the ratio of the radii which contain 75% and 25% of the total light, r_75%/r_25%.
See Half-Light "Effective" Aperture & Concentration Index
Beware the circularizing effect of the PSF on small galaxies. See The 2MASS Beam.
59 j_peak L 6.2f mag J peak pixel brightness.
60 h_peak L 6.2f mag H peak pixel brightness.
61 k_peak L 6.2f mag K peak pixel brightness.
62 j_5surf L 6.2f mag J central surface brightness (r<=5).
63 h_5surf L 6.2f mag H central surface brightness (r<=5).
64 k_5surf L 6.2f mag K central surface brightness (r<=5).

D. Miscellaneous Photometry and Characterization Measures


column Parameter Name View Format Units Description
--- Star-Galaxy Discrimination Scores
65 e_score L 5.2f - extended score: 1(extended) < e_score < 2(point-like).
See the FAQ: Star-Galaxy Separation: How do the E and G-scores work?
66 g_score L 5.2f - galaxy score: 1(extended) < g_score < 2(point-like).
See the FAQ: Star-Galaxy Separation: How do the E and G-scores work?
67 vc L 2hd - visual verification score for source.
The visual classification score gives the source type for those sources examined "by eye":
-2 = unknown
-1 = no verification (i.e., not examined)
1 = galaxy
2 = non-extended (e.g., star, double, triple, artifact)
See Visual Inspection of Extended Sources
68 cc_flg S 1s - indicates artifact contamination and/or confusion.
The contamination/confusion flag indicates whether the source's photometry and position may be affected by artifacts of, or confusion with, nearby bright stars. The flag consists of a single character string. Sources are tested for contamination and/or confusion in the order given below, and once a flag is applied to the source, testing is stopped in that band. The flag values indicate the source may be:
U: unreliable source; probable image artifact detection
C: affected by confusion with or artifact of a nearby bright star
A or a: known artifacts
z: in close promity to a large galaxy; these sources are usually junk
Z: Derived from the Large Galaxy Atlas
0: default value -- not contaminated
See Extended Source Confusion Flag
--- Postage-stamp image parameter
69 im_nx L 4hd - size of postage stamp image in pixels.
To access the XSC postage stamp images (both jpeg and FITS versions), click 2MASS All-Sky XSC Full-Resolution Image Server
--- Isophotal photom at 20 using K fiducial circ ap
70 r_k20fc L 5.1f arcsec 20mag/sq." isophotal K fiducial circular ap. radius.
"Fiducial" apertures are determined for each type of total and isophotal photometry measurements as described in the GALWORKS SDS. Essentially, they are used to make mag measurements for each type of photometry with the same aperture size in all three bands. The fiducial band for the total Kron photometry and 20mag/sq." isophotal photometry is the K band, and for the 21mag/sq." isophotal photometry it is the J band. Cautionary note: A negative value in this column indicates that the source measurement was corrupted, usually due to confusion from a nearby source, and the derived radius is not meaningful.
71 j_m_k20fc L 6.3f mag J 20mag/sq." isophotal fiducial circ. ap. mag.
72 j_msig_k20fc L 5.3f mag J 1-sigma uncertainty in 20mag/sq." iso.fid.circ. mag.
73 j_flg_k20fc L 1hd - J confusion flag for 20mag/sq." iso. fid. circ. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
74 h_m_k20fc L 6.3f mag H 20mag/sq." isophotal fiducial circ. ap. mag.
75 h_msig_k20fc L 5.3f mag H 1-sigma uncertainty in 20mag/sq." iso.fid.circ. mag.
76 h_flg_k20fc L 1hd - H confusion flag for 20mag/sq." iso. fid. circ. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
77 k_m_k20fc L 6.3f mag K 20mag/sq." isophotal fiducial circ. ap. mag.
78 k_msig_k20fc L 5.3f mag K 1-sigma uncertainty in 20mag/sq." iso.fid.circ. mag.
79 k_flg_k20fc L 1hd - K confusion flag for 20mag/sq." iso. fid. circ. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
--- Kron elliptical photometry
80 j_r_e L 5.1f arcsec J Kron elliptical aperture semi-major axis.
81 j_m_e L 6.3f mag J Kron elliptical aperture magnitude.
82 j_msig_e L 5.3f mag J 1-sigma uncertainty in Kron elliptical mag.
83 j_flg_e L 1hd - J confusion flag for Kron elliptical mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
84 h_r_e L 5.1f arcsec H Kron elliptical aperture semi-major axis.
85 h_m_e L 6.3f mag H Kron elliptical aperture magnitude.
86 h_msig_e L 5.3f mag H 1-sigma uncertainty in Kron elliptical mag.
87 h_flg_e L 1hd - H confusion flag for Kron elliptical mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
88 k_r_e L 5.1f arcsec K Kron elliptical aperture semi-major axis.
89 k_m_e L 6.3f mag K Kron elliptical aperture magnitude.
90 k_msig_e L 5.3f mag K 1-sigma uncertainty in Kron elliptical mag.
91 k_flg_e L 1hd - K confusion flag for Kron elliptical mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
--- Kron circular photometry
92 j_r_c L 5.1f arcsec J Kron circular aperture radius.
93 j_m_c L 6.3f mag J Kron circular aperture magnitude.
94 j_msig_c L 5.3f mag J 1-sigma uncertainty in Kron circular mag.
95 j_flg_c L 1hd - J confusion flag for Kron circular mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
96 h_r_c L 5.1f arcsec H Kron circular aperture radius.
97 h_m_c L 6.3f mag H Kron circular aperture magnitude.
98 h_msig_c L 5.3f mag H 1-sigma uncertainty in Kron circular mag.
99 h_flg_c L 1hd - H confusion flag for Kron circular mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
100 k_r_c L 5.1f arcsec K Kron circular aperture radius.
101 k_m_c L 6.3f mag K Kron circular aperture magnitude.
102 k_msig_c L 5.3f mag K 1-sigma uncertainty in Kron circular mag.
103 k_flg_c L 1hd - K confusion flag for Kron circular mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
--- Kron photometry using K fiducial circular aperture
104 r_fc L 5.1f arcsec K fiducial Kron circular aperture radius.
"Fiducial" apertures are determined for each type of total and isophotal photometry measurements as described in the GALWORKS SDS. Essentially, they are used to make mag measurements for each type of photometry with the same aperture size in all three bands. The fiducial band for the total Kron photometry and 20mag/sq." isophotal photometry is the K band, and for the 21mag/sq." isophotal photometry it is the J band.
105 j_m_fc L 6.3f mag J fiducial Kron circular magnitude.
106 j_msig_fc L 5.3f mag J 1-sigma uncertainty in fiducial Kron circ. mag.
107 j_flg_fc L 1hd - J confusion flag for fiducial Kron circ. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
108 h_m_fc L 6.3f mag H fiducial Kron circular magnitude.
109 h_msig_fc L 5.3f mag H 1-sigma uncertainty in fiducial Kron circ. mag.
110 h_flg_fc L 1hd - H confusion flag for fiducial Kron circ. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
111 k_m_fc L 6.3f mag K fiducial Kron circular magnitude.
112 k_msig_fc L 5.3f mag K 1-sigma uncertainty in fiducial Kron circ. mag.
113 k_flg_fc L 1hd - K confusion flag for fiducial Kron circ. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
--- Isophotal photom at 20 mag/sq.arcsec using ell ap
114 j_r_i20e L 5.1f arcsec J 20mag/sq." isophotal elliptical ap. semi-major axis.
115 j_m_i20e L 6.3f mag J 20mag/sq." isophotal elliptical ap. magnitude.
116 j_msig_i20e L 5.3f mag J 1-sigma uncertainty in 20mag/sq." iso. ell. mag.
117 j_flg_i20e L 1hd - J confusion flag for 20mag/sq." iso. ell. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
118 h_r_i20e L 5.1f arcsec H 20mag/sq." isophotal elliptical ap. semi-major axis.
119 h_m_i20e L 6.3f mag H 20mag/sq." isophotal elliptical ap. magnitude.
120 h_msig_i20e L 5.3f mag H 1-sigma uncertainty in 20mag/sq." iso. ell. mag.
121 h_flg_i20e L 1hd - H confusion flag for 20mag/sq." iso. ell. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
122 k_r_i20e L 5.1f arcsec K 20mag/sq." isophotal elliptical ap. semi-major axis.
123 k_m_i20e L 6.3f mag K 20mag/sq." isophotal elliptical ap. magnitude.
124 k_msig_i20e L 5.3f mag K 1-sigma uncertainty in 20mag/sq." iso. ell. mag.
125 k_flg_i20e L 1hd - K confusion flag for 20mag/sq." iso. ell. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
--- Isophotal photom at 20 mag/sq.arcsec using circ ap
126 j_r_i20c L 5.1f arcsec J 20mag/sq." isophotal circular aperture radius.
127 j_m_i20c L 6.3f mag J 20mag/sq." isophotal circular ap. magnitude.
128 j_msig_i20c L 5.3f mag J 1-sigma uncertainty in 20mag/sq." iso. circ. mag.
129 j_flg_i20c L 1hd - J confusion flag for 20mag/sq." iso. circ. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
130 h_r_i20c L 5.1f arcsec H 20mag/sq." isophotal circular aperture radius.
131 h_m_i20c L 6.3f mag H 20mag/sq." isophotal circular ap. magnitude.
132 h_msig_i20c L 5.3f mag H 1-sigma uncertainty in 20mag/sq." iso. circ. mag.
133 h_flg_i20c L 1hd - H confusion flag for 20mag/sq." iso. circ. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
134 k_r_i20c L 5.1f arcsec K 20mag/sq." isophotal circular aperture radius.
135 k_m_i20c L 6.3f mag K 20mag/sq." isophotal circular ap. magnitude.
136 k_msig_i20c L 5.3f mag K 1-sigma uncertainty in 20mag/sq." iso. circ. mag.
137 k_flg_i20c L 1hd - K confusion flag for 20mag/sq." iso. circ. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
--- Isophotal photom at 21 mag/sq.arcsec using ell ap
138 j_r_i21e L 5.1f arcsec J 21mag/sq." isophotal elliptical ap. semi-major axis.
139 j_m_i21e L 6.3f mag J 21mag/sq." isophotal elliptical ap. magnitude.
140 j_msig_i21e L 5.3f mag J 1-sigma uncertainty in 21mag/sq." iso. ell. mag.
141 j_flg_i21e L 1hd - J confusion flag for 21mag/sq." iso. ell. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
142 h_r_i21e L 5.1f arcsec H 21mag/sq." isophotal elliptical ap. semi-major axis.
143 h_m_i21e L 6.3f mag H 21mag/sq." isophotal elliptical ap. magnitude.
144 h_msig_i21e L 5.3f mag H 1-sigma uncertainty in 21mag/sq." iso. ell. mag.
145 h_flg_i21e L 1hd - H confusion flag for 21mag/sq." iso. ell. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
146 k_r_i21e L 5.1f arcsec K 21mag/sq." isophotal elliptical ap. semi-major axis.
147 k_m_i21e L 6.3f mag K 21mag/sq." isophotal elliptical ap. magnitude.
148 k_msig_i21e L 5.3f mag K 1-sigma uncertainty in 21mag/sq." iso. ell. mag.
149 k_flg_i21e L 1hd - K confusion flag for 21mag/sq." iso. ell. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
--- Isophotal photom at 21 using J fiducial ellip ap
150 r_j21fe L 5.1f arcsec 21mag/sq." isophotal J fiducial ell. ap. semi-major axis.
"Fiducial" apertures are determined for each type of total and isophotal photometry measurements as described in the GALWORKS SDS. Essentially, they are used to make mag measurements for each type of photometry with the same aperture size in all three bands. The fiducial band for the total Kron photometry and 20mag/sq." isophotal photometry is the K band, and for the 21mag/sq." isophotal photometry it is the J band.
151 j_m_j21fe L 6.3f mag J 21mag/sq." isophotal fiducial ell. ap. magnitude.
152 j_msig_j21fe L 5.3f mag J 1-sigma uncertainty in 21mag/sq." iso.fid.ell.mag.
153 j_flg_j21fe L 1hd - J confusion flag for 21mag/sq." iso. fid. ell. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
154 h_m_j21fe L 6.3f mag H 21mag/sq." isophotal fiducial ell. ap. magnitude.
155 h_msig_j21fe L 5.3f mag H 1-sigma uncertainty in 21mag/sq." iso.fid.ell.mag.
156 h_flg_j21fe L 1hd - H confusion flag for 21mag/sq." iso. fid. ell. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
157 k_m_j21fe L 6.3f mag K 21mag/sq." isophotal fiducial ell. ap. magnitude.
158 k_msig_j21fe L 5.3f mag K 1-sigma uncertainty in 21mag/sq." iso.fid.ell.mag.
159 k_flg_j21fe L 1hd - K confusion flag for 21mag/sq." iso. fid. ell. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
--- Isophotal photom at 21 using circ ap
160 j_r_i21c L 5.1f arcsec J 21mag/sq." isophotal circular aperture radius.
161 j_m_i21c L 6.3f mag J 21mag/sq." isophotal circular ap. magnitude.
162 j_msig_i21c L 5.3f mag J 1-sigma uncertainty in 21mag/sq." iso. circ. mag.
163 j_flg_i21c L 1hd - J confusion flag for 21mag/sq." iso. circ. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
164 h_r_i21c L 5.1f arcsec H 21mag/sq." isophotal circular aperture radius.
165 h_m_i21c L 6.3f mag H 21mag/sq." isophotal circular ap. magnitude.
166 h_msig_i21c L 5.3f mag H 1-sigma uncertainty in 21mag/sq." iso. circ. mag.
167 h_flg_i21c L 1hd - H confusion flag for 21mag/sq." iso. circ. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
168 k_r_i21c L 5.1f arcsec K 21mag/sq." isophotal circular aperture radius.
169 k_m_i21c L 6.3f mag K 21mag/sq." isophotal circular ap. magnitude.
170 k_msig_i21c L 5.3f mag K 1-sigma uncertainty in 21mag/sq." iso. circ. mag.
171 k_flg_i21c L 1hd - K confusion flag for 21mag/sq." iso. circ. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
--- Isophotal photom at 21 mag/sq.arcsec using J fiducial circ ap
172 r_j21fc L 5.1f arcsec 21mag/sq." isophotal J fiducial circular ap. radius.
"Fiducial" apertures are determined for each type of total and isophotal photometry measurements as described in the GALWORKS SDS. Essentially, they are used to make mag measurements for each type of photometry with the same aperture size in all three bands. The fiducial band for the total Kron photometry and 20mag/sq." isophotal photometry is the K band, and for the 21mag/sq." isophotal photometry it is the J band.
173 j_m_j21fc L 6.3f mag J 21mag/sq." isophotal fiducial circ. ap. mag.
174 j_msig_j21fc L 5.3f mag J 1-sigma uncertainty in 21mag/sq." iso.fid.circ.mag.
175 j_flg_j21fc L 1hd - J confusion flag for 21mag/sq." iso. fid. circ. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
176 h_m_j21fc L 6.3f mag H 21mag/sq." isophotal fiducial circ. ap. mag.
177 h_msig_j21fc L 5.3f mag H 1-sigma uncertainty in 21mag/sq." iso.fid.circ.mag.
178 h_flg_j21fc L 1hd - H confusion flag for 21mag/sq." iso. fid. circ. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
179 k_m_j21fc L 6.3f mag K 21mag/sq." isophotal fiducial circ. ap. mag.
180 k_msig_j21fc L 5.3f mag K 1-sigma uncertainty in 21mag/sq." iso.fid.circ.mag.
181 k_flg_j21fc L 1hd - K confusion flag for 21mag/sq." iso. fid. circ. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
--- Photometry from fixed circular aperture
182 j_m_5 L 6.3f mag J 5 arcsec radius circular aperture magnitude.
183 j_msig_5 L 5.3f mag J 1-sigma uncertainty in 5 arcsec circular ap. mag.
184 j_flg_5 L 1hd - J confusion flag for 5 arcsec circular ap. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
185 h_m_5 L 6.3f mag H 5 arcsec radius circular aperture magnitude.
186 h_msig_5 L 5.3f mag H 1-sigma uncertainty in 5 arcsec circular ap. mag.
187 h_flg_5 L 1hd - H confusion flag for 5 arcsec circular ap. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
188 k_m_5 L 6.3f mag K 5 arcsec radius circular aperture magnitude.
189 k_msig_5 L 5.3f mag K 1-sigma uncertainty in 5 arcsec circular ap. mag.
190 k_flg_5 L 1hd - K confusion flag for 5 arcsec circular ap. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
191 j_m_7 L 6.3f mag J 7 arcsec radius circular aperture magnitude.
192 j_msig_7 L 5.3f mag J 1-sigma uncertainty in 7 arcsec circular ap. mag.
193 j_flg_7 L 1hd - J confusion flag for 7 arcsec circular ap. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
194 h_m_7 L 6.3f mag H 7 arcsec radius circular aperture magnitude.
195 h_msig_7 L 5.3f mag H 1-sigma uncertainty in 7 arcsec circular ap. mag.
196 h_flg_7 L 1hd - H confusion flag for 7 arcsec circular ap. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
197 k_m_7 L 6.3f mag K 7 arcsec radius circular aperture magnitude.
198 k_msig_7 L 5.3f mag K 1-sigma uncertainty in 7 arcsec circular ap. mag.
199 k_flg_7 L 1hd - K confusion flag for 7 arcsec circular ap. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
200 j_m_10 L 6.3f mag J 10 arcsec radius circular aperture magnitude.
201 j_msig_10 L 5.3f mag J 1-sigma uncertainty in 10 arcsec circular ap. mag.
202 j_flg_10 L 1hd - J confusion flag for 10 arcsec circular ap. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
203 h_m_10 L 6.3f mag H 10 arcsec radius circular aperture magnitude.
204 h_msig_10 L 5.3f mag H 1-sigma uncertainty in 10 arcsec circular ap. mag.
205 h_flg_10 L 1hd - H confusion flag for 10 arcsec circular ap. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
206 k_m_10 L 6.3f mag K 10 arcsec radius circular aperture magnitude.
207 k_msig_10 L 5.3f mag K 1-sigma uncertainty in 10 arcsec circular ap. mag.
208 k_flg_10 L 1hd - K confusion flag for 10 arcsec circular ap. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
209 j_m_15 L 6.3f mag J 15 arcsec radius circular aperture magnitude.
210 j_msig_15 L 5.3f mag J 1-sigma uncertainty in 15 arcsec circular ap. mag.
211 j_flg_15 L 1hd - J confusion flag for 15 arcsec circular ap. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
212 h_m_15 L 6.3f mag H 15 arcsec radius circular aperture magnitude.
213 h_msig_15 L 5.3f mag H 1-sigma uncertainty in 15 arcsec circular ap. mag.
214 h_flg_15 L 1hd - H confusion flag for 15 arcsec circular ap. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
215 k_m_15 L 6.3f mag K 15 arcsec radius circular aperture magnitude.
216 k_msig_15 L 5.3f mag K 1-sigma uncertainty in 15 arcsec circular ap. mag.
217 k_flg_15 L 1hd - K confusion flag for 15 arcsec circular ap. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
218 j_m_20 L 6.3f mag J 20 arcsec radius circular aperture magnitude.
219 j_msig_20 L 5.3f mag J 1-sigma uncertainty in 20 arcsec circular ap. mag.
220 j_flg_20 L 1hd - J confusion flag for 20 arcsec circular ap. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
221 h_m_20 L 6.3f mag H 20 arcsec radius circular aperture magnitude.
222 h_msig_20 L 5.3f mag H 1-sigma uncertainty in 20 arcsec circular ap. mag.
223 h_flg_20 L 1hd - H confusion flag for 20 arcsec circular ap. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
224 k_m_20 L 6.3f mag K 20 arcsec radius circular aperture magnitude.
225 k_msig_20 L 5.3f mag K 1-sigma uncertainty in 20 arcsec circular ap. mag.
226 k_flg_20 L 1hd - K confusion flag for 20 arcsec circular ap. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
227 j_m_25 L 6.3f mag J 25 arcsec radius circular aperture magnitude.
228 j_msig_25 L 5.3f mag J 1-sigma uncertainty in 25 arcsec circular ap. mag.
229 j_flg_25 L 1hd - J confusion flag for 25 arcsec circular ap. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
230 h_m_25 L 6.3f mag H 25 arcsec radius circular aperture magnitude.
231 h_msig_25 L 5.3f mag H 1-sigma uncertainty in 25 arcsec circular ap. mag.
232 h_flg_25 L 1hd - H confusion flag for 25 arcsec circular ap. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
233 k_m_25 L 6.3f mag K 25 arcsec radius circular aperture magnitude.
234 k_msig_25 L 5.3f mag K 1-sigma uncertainty in 25 arcsec circular ap. mag.
235 k_flg_25 L 1hd - K confusion flag for 25 arcsec circular ap. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
236 j_m_30 L 6.3f mag J 30 arcsec radius circular aperture magnitude.
237 j_msig_30 L 5.3f mag J 1-sigma uncertainty in 30 arcsec circular ap. mag.
238 j_flg_30 L 1hd - J confusion flag for 30 arcsec circular ap. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
239 h_m_30 L 6.3f mag H 30 arcsec radius circular aperture magnitude.
240 h_msig_30 L 5.3f mag H 1-sigma uncertainty in 30 arcsec circular ap. mag.
241 h_flg_30 L 1hd - H confusion flag for 30 arcsec circular ap. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
242 k_m_30 L 6.3f mag K 30 arcsec radius circular aperture magnitude.
243 k_msig_30 L 5.3f mag K 1-sigma uncertainty in 30 arcsec circular ap. mag.
244 k_flg_30 L 1hd - K confusion flag for 30 arcsec circular ap. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
245 j_m_40 L 6.3f mag J 40 arcsec radius circular aperture magnitude.
246 j_msig_40 L 5.3f mag J 1-sigma uncertainty in 40 arcsec circular ap. mag.
247 j_flg_40 L 1hd - J confusion flag for 40 arcsec circular ap. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
248 h_m_40 L 6.3f mag H 40 arcsec radius circular aperture magnitude.
249 h_msig_40 L 5.3f mag H 1-sigma uncertainty in 40 arcsec circular ap. mag.
250 h_flg_40 L 1hd - H confusion flag for 40 arcsec circular ap. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
251 k_m_40 L 6.3f mag K 40 arcsec radius circular aperture magnitude.
252 k_msig_40 L 5.3f mag K 1-sigma uncertainty in 40 arcsec circular ap. mag.
253 k_flg_40 L 1hd - K confusion flag for 40 arcsec circular ap. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
254 j_m_50 L 6.3f mag J 50 arcsec radius circular aperture magnitude.
255 j_msig_50 L 5.3f mag J 1-sigma uncertainty in 50 arcsec circular ap. mag.
256 j_flg_50 L 1hd - J confusion flag for 50 arcsec circular ap. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:

0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative


If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
257 h_m_50 L 6.3f mag H 50 arcsec radius circular aperture magnitude.
258 h_msig_50 L 5.3f mag H 1-sigma uncertainty in 50 arcsec circular ap. mag.
259 h_flg_50 L 1hd - H confusion flag for 50 arcsec circular ap. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
260 k_m_50 L 6.3f mag K 50 arcsec radius circular aperture magnitude.
261 k_msig_50 L 5.3f mag K 1-sigma uncertainty in 50 arcsec circular ap. mag.
262 k_flg_50 L 1hd - K confusion flag for 50 arcsec circular ap. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
263 j_m_60 L 6.3f mag J 60 arcsec radius circular aperture magnitude.
264 j_msig_60 L 5.3f mag J 1-sigma uncertainty in 60 arcsec circular ap. mag.
265 j_flg_60 L 1hd - J confusion flag for 60 arcsec circular ap. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
266 h_m_60 L 6.3f mag H 60 arcsec radius circular aperture magnitude.
267 h_msig_60 L 5.3f mag H 1-sigma uncertainty in 60 arcsec circular ap. mag.
268 h_flg_60 L 1hd - H confusion flag for 60 arcsec circular ap. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
269 k_m_60 L 6.3f mag K 60 arcsec radius circular aperture magnitude.
270 k_msig_60 L 5.3f mag K 1-sigma uncertainty in 60 arcsec circular ap. mag.
271 k_flg_60 L 1hd - K confusion flag for 60 arcsec circular ap. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
272 j_m_70 L 6.3f mag J 70 arcsec radius circular aperture magnitude.
273 j_msig_70 L 5.3f mag J 1-sigma uncertainty in 70 arcsec circular ap. mag.
274 j_flg_70 L 1hd - J confusion flag for 70 arcsec circular ap. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
275 h_m_70 L 6.3f mag H 70 arcsec radius circular aperture magnitude.
276 h_msig_70 L 5.3f mag H 1-sigma uncertainty in 70 arcsec circular ap. mag.
277 h_flg_70 L 1hd - H confusion flag for 70 arcsec circular ap. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
278 k_m_70 L 6.3f mag K 70 arcsec radius circular aperture magnitude.
279 k_msig_70 L 5.3f mag K 1-sigma uncertainty in 70 arcsec circular ap. mag.
280 k_flg_70 L 1hd - K confusion flag for 70 arcsec circular ap. mag.
The confusion flags [jhk]_flg
for each mag are defined as follows:
0 if no other sources within aperture used
1 if ap contained pixels masked off in coadd
2 if ap contained pixels masked off due to neighboring sources
3 if ap contained pixels that had a point source flux subtracted off
4 if ap contained pixels within bright star mask
5 if ap contained pixels masked off due to persistence
6 if aperture ran into coadd boundary
7 if ap contained pixels within bright galaxy mask
9 if integrated flux is negative
If the integrated flux is negative, a mag value is calculated using
    BFMag = 99.0 - [ZERO_CAL - 2.5 log10(|flux|)];
the resulting mag range is between ~ 75 and 99.
--- System photometry
281 j_m_sys L 6.3f mag J system photometry magnitude.
The system flux includes the flux from this extended source and anything else in the immediate area, including stars and neighboring galaxies that "touch" this source.
282 j_msig_sys L 5.3f mag J 1-sigma uncertainty in system photometry mag.
283 h_m_sys L 6.3f mag H system photometry magnitude.
The system flux includes the flux from this extended source and anything else in the immediate area, including stars and neighboring galaxies that "touch" this source.
284 h_msig_sys L 5.3f mag H 1-sigma uncertainty in system photometry mag.
285 k_m_sys L 6.3f mag K system photometry magnitude.
The system flux includes the flux from this extended source and anything else in the immediate area, including stars and neighboring galaxies that "touch" this source.
286 k_msig_sys L 5.3f mag K 1-sigma uncertainty in system photometry mag.
287 sys_flg L 1hd - system flag: 0=no system, 1=nearby galaxy flux incl. in mag.
288 contam_flg L 1hd - contamination flag: 0=no stars, 1=stellar flux incl. in mag.
--- 5-sigma area ratios
289 j_5sig_ba L 5.3f - J minor/major axis ratio fit to the 5-sigma isophote.
290 j_5sig_phi L 3hd deg J angle to 5-sigma major axis (E of N).
291 h_5sig_ba L 5.3f - H minor/major axis ratio fit to the 5-sigma isophote.
292 h_5sig_phi L 3hd deg H angle to 5-sigma major axis (E of N).
293 k_5sig_ba L 5.3f - K minor/major axis ratio fit to the 5-sigma isophote.
294 k_5sig_phi L 3hd deg K angle to 5-sigma major axis (E of N).
--- 5-sigma to 3-sigma area
295 j_d_area L 3hd - J 5-sigma to 3-sigma differential area.
296 j_perc_darea L 3hd - J 5-sigma to 3-sigma percent area change.
297 h_d_area L 3hd - H 5-sigma to 3-sigma differential area.
298 h_perc_darea L 3hd - H 5-sigma to 3-sigma percent area change.
299 k_d_area L 3hd - K 5-sigma to 3-sigma differential area.
300 k_perc_darea L 3hd - K 5-sigma to 3-sigma percent area change.
--- Bi-symmetric quantities
301 j_bisym_rat L 5.3f - J bi-symmetric flux ratio.
302 j_bisym_chi L 6.3f - J bi-symmetric cross-correlation chi.
303 h_bisym_rat L 5.3f - H bi-symmetric flux ratio.
304 h_bisym_chi L 6.3f - H bi-symmetric cross-correlation chi.
305 k_bisym_rat L 5.3f - K bi-symmetric flux ratio.
306 k_bisym_chi L 6.3f - K bi-symmetric cross-correlation chi.
--- Parameters for extended src discrimination from point
srcs
307 j_sh0 L 5.2f - J ridge shape (LCSB: BSNR limit).
308 j_sig_sh0 L 5.2f - J ridge shape sigma (LCSB: B2SNR limit).
309 h_sh0 L 5.2f - H ridge shape (LCSB: BSNR limit).
310 h_sig_sh0 L 5.2f - H ridge shape sigma (LCSB: B2SNR limit).
311 k_sh0 L 5.2f - K ridge shape (LCSB: BSNR limit).
312 k_sig_sh0 L 5.2f - K ridge shape sigma (LCSB: B2SNR limit).
313 j_sc_mxdn L 6.1f - J mxdn (score) (LCSB: BSNR - block/smoothed SNR).
314 j_sc_sh L 6.1f - J shape (score).
315 j_sc_wsh L 6.1f - J wsh (score) (LCSB: PSNR - peak raw SNR).
316 j_sc_r23 L 6.1f - J r23 (score) (LCSB: TSNR - integrated SNR for r=15).
317 j_sc_1mm L 6.1f - J 1st moment (score) (LCSB: super blk 2,4,8 SNR).
318 j_sc_2mm L 6.1f - J 2nd moment (score) (LCSB: SNRMAX - super SNR max).
319 j_sc_vint L 6.1f - J vint (score).
320 j_sc_r1 L 6.1f - J r1 (score).
321 j_sc_msh L 6.1f - J median shape score.
322 h_sc_mxdn L 6.1f - H mxdn (score) (LCSB: BSNR - block/smoothed SNR).
323 h_sc_sh L 6.1f - H shape (score).
324 h_sc_wsh L 6.1f - H wsh (score) (LCSB: PSNR - peak raw SNR).
325 h_sc_r23 L 6.1f - H r23 (score) (LCSB: TSNR - integrated SNR for r=15).
326 h_sc_1mm L 6.1f - H 1st moment (score) (LCSB: super blk 2,4,8 SNR).
327 h_sc_2mm L 6.1f - H 2nd moment (score) (LCSB: SNRMAX - super SNR max).
328 h_sc_vint L 6.1f - H vint (score).
329 h_sc_r1 L 6.1f - H r1 (score).
330 h_sc_msh L 6.1f - H median shape score.
331 k_sc_mxdn L 6.1f - K mxdn (score) (LCSB: BSNR - block/smoothed SNR).
332 k_sc_sh L 6.1f - K shape (score).
333 k_sc_wsh L 6.1f - K wsh (score) (LCSB: PSNR - peak raw SNR).
334 k_sc_r23 L 6.1f - K r23 (score) (LCSB: TSNR - integrated SNR for r=15).
335 k_sc_1mm L 6.1f - K 1st moment (score) (LCSB: super blk 2,4,8 SNR).
336 k_sc_2mm L 6.1f - K 2nd moment (score) (LCSB: SNRMAX - super SNR max).
337 k_sc_vint L 6.1f - K vint (score).
338 k_sc_r1 L 6.1f - K r1 (score).
339 k_sc_msh L 6.1f - K median shape score.
340 j_chif_ellf L 6.1f - J % chi-fraction for elliptical fit to 3-sig isophote.
341 k_chif_ellf L 6.1f - K % chi-fraction for elliptical fit to 3-sig isophote.
342 ellfit_flg L 1hd - ellipse fitting contamination flag.
343 sup_chif_ellf L 6.1f - super-coadd % chi-fraction for ellip. fit to 3-sig isophote.
--- Coadd background, brightness
344 n_blank L 4hd - number of blanked source records.
These parameters refer to sources that were blanked and/or subtracted from the images before doing photometry. Data for each of these blanked or subtracted sources are found in the blanked and subtracted source tables.
345 n_sub L 4hd - number of subtracted source records.
These parameters refer to sources that were blanked and/or subtracted from the images before doing photometry. Data for each of these blanked or subtracted sources are found in the blanked and subtracted source tables.
346 bl_sub_flg L 1hd - blanked/subtracted src description flag.
--- Other miscellaneous parameters
347 id_flg L 1hd - type/galaxy ID flag (0=non-catalog, 1=catalog, 2=LCSB).
This flag indicates the extended source catalog type as follows:
0 = extended source not found in another catalog
1 = extended source is found in galaxy catalog (ID found in id_cat field)
2 = LCSB (Low Central Surface Brightness) source
348 id_cat L 20s - matched galaxy's catalog name.
349 fg_flg L 6s - flux-growth convergence flag.
350 blk_fac L 1hd - LCSB blocking factor (1, 2, 4, 8).
351 dup_src L 1hd - Duplicate source flag. Used in conjunction with the use_src flag, this numerical flag indicates whether the source falls in a Tile overlap region, and if so, if it was detected multiple times.
  • "0" = The source does not fall within a Tile overlap region (use_src="1"), or it falls in an overlap region and there were no sources detected within 2" of its position in the overlapping Tile (use_src="0").
  • "1" = The source falls within a Tile overlap region, and there is one source detected within 2" of its position in the overlapping Tile.
  • ">1" = The source falls within a Tile overlap region, and there are multiple sources detected within 2" of its position in the overlapping Tile, and/or within its own Tile. This implies confusion in the multiple source resolution procedure.

352 use_src L 1hd - Use source flag. Used in conjunction with the dup_src flag, this numerical flag indicates if a source falls within a Tile overlap region, and whether or not it satisfies the unbiased selection rules for multiple source resolution.
  • "1" = The source does not fall in a Tile overlap region (dup_src="0"), or it falls in an overlap region, but lies farther from its scan edge than any apparition of the source in another Tile. A source must have use_src="1" to be considered part of the sub-Catalog that satisfies the 2MASS Level 1 Science Requirements
  • "0" = The source falls in a Tile overlap region, but does not have a detection within 2" of its position in any overlapping Tiles. PSC sources with use_src="0" will always have dup_src="0". Such objects are usually faint, and thus toggling above and below the detection limits, or may have moved between the scans of the different Tiles.
  • ">1" = The source falls within a Tile overlap region, and there are multiple sources detected within 2" of its position in the overlapping Tile, and/or within its own Tile. This implies confusion in the multiple source resolution procedure.

353 prox L 5.1f arcsec Proximity. The distance between this source and its nearest neighbor in the PSC. The pts_key of the nearest source is given in the pxcntr column. The effective resolution of the 2MASS system is approximately 5". Any source with prox < 6" is potentially confused with a nearby object, and should be used with caution.
354 pxpa L 3hd deg The position angle on the sky of the vector from the source to the nearest neighbor in the PSC, in degrees East of North. This column in null if prox=0.0, which occurs only for confused sources or from errors in the bandmerge process caused by confusion.
355 pxcntr L 10d - ext_key value of nearest XSC source.
356 dist_edge_ns L %5d arcsec The distance from the source to the nearest North or South scan edge. The scan edge is defined by the great-circle interpolation between the 3-band coverage corners. The equatorial coordinates of the 3-band coverage corners are given in the Scan Information Table, referenced by the scan_key. The first character of the dist_edge_flg indicates to which edge the source is closer.
357 dist_edge_ew L %3d arcsec The distance from the source to the nearest East or West scan edge. The scan edge is defined by the great-circle interpolation between the 3-band coverage corners. The equatorial coordinates of the 3-band coverage corners are given in the Scan Information Table, referenced by the scan_key. The second character of the dist_edge_flg indicates to which edge the source is closer.
358 dist_edge_flg L %2s - flag indicating which edges ([n|s][e|w]) are nearest to src.
359 pts_key L 10d - key to point source data DB record.
If the source has point source data (i.e. it is not an LCSB), this field will be set to the key of the record in the point source table containing the point source data. The point source data will also have the same date, hemisphere, scan, id keys.
360 mp_key L 5d - key to minor planet prediction DB record.
If a minor planet (asteroid) is predicted at this src's position, the field is set to the key of the record containing the minor planet prediction data (see the minor planet tbls). The minor planet data will also have the same date, hemisphere, scan, id keys.
361 night_key L 4d - key to night data record in "scan DB".
This field is set to the key of the record containing the corresponding night data in the night data table. The records will also have the same date and hemisphere keys.
362 scan_key S 6d - key to scan data record in "scan DB".
This field is set to the key of the record containing the corresponding scan data in the scan data table. The records will also have the same date, hemisphere, scan keys.
363 coadd_key L 7d - key to coadd data record in "scan DB".
This field is set to the key of the record containing the corresponding J, H, and K band coadd data in the coadd data table. The records will also have the same date, hemisphere, scan, coadd keys.
364 hemis L 1s - hemisphere (N/S) of observation. "n" = North/Mt. Hopkins; "s" = South/CTIO.
365 date L yyyy-mm-dd - The observation reference date for this source expressed in ISO standard format. This is the UT day value at sunrise for the night on which the source was observed. Because it is possible for the UT day to change during a night of observations, the actual UT date for a source measurement can differ from date by one day. Use the Julian Day value (jdate) for a more accurate determination of the observation time of the source.
366 scan L 3hd - scan number (unique within date).
367 coadd L 03hd - 3-digit coadd number (unique within scan).
368 id L 6d - source ID number (unique within scan, coadd).
369 x_coadd L 6.1f arcsec x (cross-scan) position (coadd coord.).
370 y_coadd L 6.1f arcsec y (in-scan) position (coadd coord.).
371 j_subst2 L 6.1f - J residual background #2 (score).
372 h_subst2 L 6.1f - H residual background #2 (score).
373 k_subst2 L 6.1f - K residual background #2 (score).
374 j_back L 6.1f - J coadd median background.
375 h_back L 6.1f - H coadd median background.
376 k_back L 6.1f - K coadd median background.
377 j_resid_ann L 7.3f DN J residual annulus background median.
378 h_resid_ann L 7.3f DN H residual annulus background median.
379 k_resid_ann L 7.3f DN K residual annulus background median.
380 j_bndg_per L 5d arcsec J banding Fourier Transf. period on this side of coadd.
381 j_bndg_amp L 6.3f DN J banding maximum FT amplitude on this side of coadd.
382 h_bndg_per L 5d arcsec H banding Fourier Transf. period on this side of coadd.
383 h_bndg_amp L 6.3f DN H banding maximum FT amplitude on this side of coadd.
384 k_bndg_per L 5d arcsec K banding Fourier Transf. period on this side of coadd.
385 k_bndg_amp L 6.3f DN K banding maximum FT amplitude on this side of coadd.
386 j_seetrack L 4.1f - J band seetracking score.
387 h_seetrack L 4.1f - H band seetracking score.
388 k_seetrack L 4.1f - K band seetracking score.
389 ext_key S 9d - entry counter (key) number (unique within table).


[Last Updated: 2003 April 10; by T. Jarrett and R. Cutri]