SERVS 2-band Catalog Definitions
Overview
The "Spitzer Extragalactic Representative Volume Survey" (SERVS) Exploration Science program conducted deep IRAC 3.6 and 4.5 micron observations of five extragalactic fields (ELAIS-N1, Lockman Hole, XMM, ELAIS-S1, and CDFS).
The 2-band high reliability catalogs are matched [3.6] and [4.5] catalogs, with the low coverage areas near the edges of the survey omitted (POLY_12=1). These catalogs should be used if you are using SERVS to select your sample, as objects in this catalog should be highly reliable (>99.9%). To appear in the catalog objects must appear in both bands, and the detection in one band must be > 10-sigma in CSNR, where CSNR is the coverage-weighted signal-to-noise ratio, described in Section 2.3.
Name | Intype | Units | Description |
---|---|---|---|
NAME | char | Source name | |
ID | long | ID number | |
ra | double | degrees | Right ascension (J2000) |
dec | double | degrees | Declination (J2000) |
POLY | int | Combined high coverage polygon flag: 1 if POLY_1=1 or POLY_2=1, 0 otherwise | |
REL | int | Combined reliability flag: 1 if REL_1=1 or REL_2=1, 0 otherwise | |
ID_1 | int | ID number, 3.6 microns | |
RA_1 | double | degrees | Right Ascension (J2000), 3.6 microns |
DEC_1 | double | degrees | Declination (J2000), 3.6 microns |
FLUX_APER_1_1 | double | microJy | Flux in 1.4" radius aperture, 3.6 microns |
FLUX_APER_2_1 | double | microJy | Flux in 1.9" radius aperture, 3.6 microns |
FLUX_APER_3_1 | double | microJy | Flux in 2.9" radius aperture, 3.6 microns |
FLUX_APER_4_1 | double | microJy | Flux in 4.9" radius aperture, 3.6 microns |
FLUX_APER_5_1 | double | microJy | Flux in 5.8" radius aperture, 3.6 microns |
FLUXERR_APER_1_1 | double | microJy | Flux error in 1.4" radius aperture, 3.6 microns |
FLUXERR_APER_2_1 | double | microJy | Flux error in 1.9" radius aperture, 3.6 microns |
FLUXERR_APER_3_1 | double | microJy | Flux error in 2.9" radius aperture, 3.6 microns |
FLUXERR_APER_4_1 | double | microJy | Flux error in 4.9" radius aperture, 3.6 microns |
FLUXERR_APER_5_1 | double | microJy | Flux error in 5.8" radius aperture, 3.6 microns |
SNR_1_1 | double | Signal to noise ratio in 1.4" aperture, 3.6 microns | |
SNR_2_1 | double | Signal to noise ratio in 1.9" aperture, 3.6 microns | |
SNR_3_1 | double | Signal to noise ratio in 2.9" aperture, 3.6 microns | |
SNR_4_1 | double | Signal to noise ratio in 4.9" aperture, 3.6 microns | |
SNR_5_1 | double | Signal to noise ratio in 5.8" aperture, 3.6 microns | |
FLUX_ISO_1 | double | microJy | Isophotal flux, 3.6 microns |
FLUX_AUTO_1 | double | microJy | Kron flux, 3.6 microns |
FLUXERR_ISO_1 | double | microJy | Uncertainty in FLUX_ISO_1 |
FLUXERR_AUTO_1 | double | microJy | Uncertainty in FLUX_AUTO_1 |
SNR_ISO_1 | double | Signal to noise ratio for FLUX_ISO_1 | |
SNR_AUTO_1 | double | Signal to noise ratio for FLUX_AUTO_1 | |
KRON_RADIUS_1 | float | pixels | Kron radius, 3.6 microns |
CLASS_STAR_1 | float | Stellaricity, 3.6 microns | |
FLAGS_1 | int | Flags, 3.6 microns: 1 (Bit 0): The object has neighbors, bright and close enough to significantly bias the photometry, or bad pixels (more than 10% of the inte- grated area affected). 2 (Bit 1): The object was originally blended with another one. 4 (Bit 2): At least one pixel of the object is saturated (or very close to). Set using Table 3. 8 (Bit 3): The object is truncates (to close to an image boundary). 16 (Bit 4): Object's aperture data are incomplete or corrupted. 32 (Bit 5): Object's isophotal data are incomplete or corrupted. |
|
MASK_1 | int | Mask, 3.6 microns: 1 (Bit 0): Overall data quality (set if poor) 2 (Bit 1): Set if pixel contains radhit 4 (Bit 2): Set if optical ghost present 8 (Bit 3): Set if stray light present 16 (Bit 4): Set if saturation donut 32 (Bit 5): Set if pixel contains latent image 64 (Bit 6): Set if pixel is saturated 128 (Bit 7): Set if column pulldown present 256 (Bit 8): Set if mosaic coverage <4 (added to the catalogs post-extraction) 512 (Bit 9): Set if bright star is present |
|
COV_1 | double | Coverage of 100s frames, 3.6 microns | |
CSNR_1 | double | Coverage weighted SNR in aperture 2, 3.6 microns | |
POLY_1 | int | High coverage polygon flag, 3.6 microns: 1 if within high coverage polygon, 0 otherwise | |
REL_1 | int | Reliability flag, 3.6 microns: 1 if both CSNR>1 and POLY=1, otherwise 0 | |
ID_2 | int | ID number, 4.5 microns | |
RA_2 | double | degrees | Right Ascension (J2000), 4.5 microns |
DEC_2 | double | degrees | Declination (J2000), 4.5 microns |
FLUX_APER_1_2 | double | microJy | Flux in 1.4" radius aperture, 4.5 microns |
FLUX_APER_2_2 | double | microJy | Flux in 1.9" radius aperture, 4.5 microns |
FLUX_APER_3_2 | double | microJy | Flux in 2.9" radius aperture, 4.5 microns |
FLUX_APER_4_2 | double | microJy | Flux in 4.9" radius aperture, 4.5 microns |
FLUX_APER_5_2 | double | microJy | Flux in 5.8" radius aperture, 4.5 microns |
FLUXERR_APER_1_2 | double | microJy | Flux error in 1.4" radius aperture, 4.5 microns |
FLUXERR_APER_2_2 | double | microJy | Flux error in 1.9" radius aperture, 4.5 microns |
FLUXERR_APER_3_2 | double | microJy | Flux error in 2.9" radius aperture, 4.5 microns |
FLUXERR_APER_4_2 | double | microJy | Flux error in 4.9" radius aperture, 4.5 microns |
FLUXERR_APER_5_2 | double | microJy | Flux error in 5.8" radius aperture, 4.5 microns |
SNR_1_2 | double | Signal to noise ratio in 1.4" aperture, 4.5 microns | |
SNR_2_2 | double | Signal to noise ratio in 1.9" aperture, 4.5 microns | |
SNR_3_2 | double | Signal to noise ratio in 2.9" aperture, 4.5 microns | |
SNR_4_2 | double | Signal to noise ratio in 4.9" aperture, 4.5 microns | |
SNR_5_2 | double | Signal to noise ratio in 5.8" aperture, 4.5 microns | |
FLUX_ISO_2 | double | microJy | Isophotal flux, 4.5 microns |
FLUX_AUTO_2 | double | microJy | Kron flux, 4.5 microns |
FLUXERR_ISO_2 | double | microJy | Uncertainty in FLUX_ISO_2 |
FLUXERR_AUTO_2 | double | microJy | Uncertainty in FLUX_AUTO_2 |
SNR_ISO_2 | double | Signal to noise ratio for FLUX_ISO_2 | |
SNR_AUTO_2 | double | Signal to noise ratio for FLUX_AUTO_2 | |
KRON_RADIUS_2 | float | pixels | Kron radius, 4.5 microns |
CLASS_STAR_2 | float | Stellaricity, 4.5 microns | |
FLAGS_2 | int | Flags, 4.5 microns: 1 (Bit 0): The object has neighbors, bright and close enough to significantly bias the photometry, or bad pixels (more than 10% of the inte- grated area affected). 2 (Bit 1): The object was originally blended with another one. 4 (Bit 2): At least one pixel of the object is saturated (or very close to). Set using Table 3. 8 (Bit 3): The object is truncates (to close to an image boundary). 16 (Bit 4): Object's aperture data are incomplete or corrupted. 32 (Bit 5): Object's isophotal data are incomplete or corrupted. |
|
MASK_2 | int | Mask, 4.5 microns: 1 (Bit 0): Overall data quality (set if poor) 2 (Bit 1): Set if pixel contains radhit 4 (Bit 2): Set if optical ghost present 8 (Bit 3): Set if stray light present 16 (Bit 4): Set if saturation donut 32 (Bit 5): Set if pixel contains latent image 64 (Bit 6): Set if pixel is saturated 128 (Bit 7): Set if column pulldown present 256 (Bit 8): Set if mosaic coverage <4 (added to the catalogs post-extraction) 512 (Bit 9): Set if bright star is present |
|
COV_2 | double | Coverage of 100s frames, 4.5 microns | |
CSNR_2 | double | Coverage weighted SNR in aperture 2, 4.5 microns | |
POLY_2 | int | High coverage polygon flag, 4.5 microns: 1 if within high coverage polygon, 0 otherwise | |
REL_2 | int | Reliability flag, 4.5 microns: 1 if both CSNR>1 and POLY=1, otherwise 0 | |
Separation | double | arcsec | Position difference between 3.6 and 4.5 microns |