z0MGS Catalog Definitions
Overview
The z = 0 Multiwavelength Galaxy Synthesis (z0MGS) Data Release 1
includes GALEX and WISE imaging for a sample of 15,748 local galaxies (D ≲ 50 Mpc) as well as best-effort masks that can be used to help remove stars and other galaxies from the images.
The z0MGS Index contains an overview of the dataset and the integrated stellar mass and star formation rate measured for each galaxy. The z0MGS 7.5" Simple Index contains the same information as the main Index for the 7.5" resolution images, but does not include the Integrated Photometry, Sample Definition Parameters, or Derived Parameters (columns after GALAXY_OVERLAP_FLAG, below).
For more information about z0MGS, see Leroy et al. (2019) and the Delivery Document.
In the table below, band = GALEX FUV, NUV, WISE W1, W2, W3, W4.
| Name |
Intype |
Units |
Description |
| PGC_NAME |
char |
|
Galaxy name: PGC name with no leading 0s |
| PGC |
long |
|
PGC number |
| ra |
double |
deg |
Right Ascension (J2000) |
| dec |
double |
deg |
Declination (J2000) |
| GL_DEG |
double |
deg |
Galactic longitude |
| GB_DEG |
double |
deg |
Galactic latitude |
| RESOLUTION |
char |
|
Resolution |
| HAS_band |
int |
|
Data availability flag: band. Flag value 0 for no data, 1 for data exists |
| TIME_FUV |
double |
s |
Mean integration time: FUV |
| TIME_NUV |
double |
s |
Mean integration time: NUV |
| AFUV |
double |
mag |
Applied extinction value: FUV |
| ANUV |
double |
mag |
Applied extinction value: NUV |
| RMS_band |
double |
MJy/sr |
RMS of background pixels in band |
| STD_band |
double |
MJy/sr |
Standard deviation of background pixels in band |
| SAT_EFFECTS_band |
int |
|
Saturation flag: band |
| STAR_AREA_band |
double |
|
Fraction of galaxy area contaminated by foreground stars: band |
| STAR_FLUX_band |
double |
|
Fraction of galaxy flux contaminated by foreground stars: band
Note: STAR_FLUX = sum(mask*image)/sum(image) over the relevant, so the value can be < 0 or > 1 in the case of nondetections and/or extreme noise spikes. |
| STAR_FLAG_band |
int |
|
Flag indicating that STAR_FLUX_band > 20% |
| GALAXY_MASK_OVERLAP |
double |
|
Fraction of galaxy flagged due to presence of other galaxies |
| GALAXY_OVERLAP_FLAG |
int |
|
Flag indicating that GALAXY_MASK_OVERLAP > 10% |
| FLUX_band |
double |
Jy |
band flux |
| RMS_FLUX_band |
double |
Jy |
band flux uncertainty based on background RMS |
| STD_FLUX_band |
double |
Jy |
band flux uncertainty based on background standard deviation |
| DIST_MPC |
double |
Mpc |
Distance to galaxy |
| E_DIST_DEX |
double |
'dex' |
Distance uncertainty |
| MTOL |
double |
solMass/solLum |
W1 mass-to-light ratio |
| METHOD_MTOL |
char |
|
Method used to determine MTOL, see Leroy et al. (2019) |
| LOGMASS |
double |
log(solMass) |
Logarithm of the derived stellar mass |
| E_LOGMASS |
double |
'dex' |
Uncertainty in stellar mass |
| LOGSFR |
double |
log(solMass/yr) |
Derived star formation rate |
| E_LOGSFR |
double |
'dex' |
Uncertainty in star formation rate |
| METHOD_SFR |
char |
|
Method used to determine LOGSFR, see Leroy et al. (2019) |
| DELTAMS |
double |
'dex' |
Offset from the star-forming main sequence |
| ABSBTC |
double |
mag |
Absolute B magnitude from LEDA computed from the "btc" corrected total apparent magnitude |
| COMPLETE_SAMPLE |
int |
|
Flag indicating whether the galaxy is part of the formal z0MG sample, i.e. is within d < 50 Mpc and M_B < -18 |
| summary_url |
char |
|
z0MG galaxy summary page |