SERVS 1-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).
Objects in the single band catalogs are not required to have any counterparts in the other band. They are cut at CSNR > 5 and also have the low coverage areas at the edges of the survey omitted (POLY=1), resulting in a single-band reliability flag REL=1. They are thus deeper than the 2-band high reliability catalogs. These should be used if you are matching with a reliable catalog from another band (e.g. near-infrared), and simply want as many matches as possible, or are doing a statistical study. Catalogs with objects having REL=0 are excluded from the catalogs supplied to IRSA, they may be obtained by direct application to the SERVS PI.
Name | Intype | Units | Description |
---|---|---|---|
NAME | char | Source name | |
ID | int | ID number | |
ra | double | degrees | Right ascension (J2000) |
dec | double | degrees | Declination (J2000) |
FLUX_APER_1 | double | microJy | Flux in 1.4" radius aperture |
FLUX_APER_2 | double | microJy | Flux in 1.9" radius aperture |
FLUX_APER_3 | double | microJy | Flux in 2.9" radius aperture |
FLUX_APER_4 | double | microJy | Flux in 4.9" radius aperture |
FLUX_APER_5 | double | microJy | Flux in 5.8" radius aperture |
FLUXERR_APER_1 | double | microJy | Flux error in 1.4" radius aperture |
FLUXERR_APER_2 | double | microJy | Flux error in 1.9" radius aperture |
FLUXERR_APER_3 | double | microJy | Flux error in 2.9" radius aperture |
FLUXERR_APER_4 | double | microJy | Flux error in 4.9" radius aperture |
FLUXERR_APER_5 | double | microJy | Flux error in 5.8" radius aperture |
SNR_1 | double | Signal to noise ratio in 1.4" radius aperture | |
SNR_2 | double | Signal to noise ratio in 1.9" radius aperture | |
SNR_3 | double | Signal to noise ratio in 2.9" radius aperture | |
SNR_4 | double | Signal to noise ratio in 4.9" radius aperture | |
SNR_5 | double | Signal to noise ratio in 5.8" radius aperture | |
FLUX_ISO | double | microJy | Isophotal flux |
FLUX_AUTO | double | microJy | Kron flux |
FLUXERR_ISO | double | microJy | Uncertainty in FLUX_ISO |
FLUXERR_AUTO | double | microJy | Uncertainty in FLUX_AUTO |
SNR_ISO | double | Signal to noise ratio in FLUX_ISO | |
SNR_AUTO | double | Signal to noise ratio in FLUX_AUTO | |
KRON_RADIUS | float | pixels | Kron radius |
CLASS_STAR | float | Stellaricity (on a scale from 0, definitely a re- solved object, to 1, definitely unresolved) | |
FLAGS | int | Flags: 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 | int | Mask: 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 | double | Coverage of 100s frames | |
CSNR | double | Coverage-weighted SNR in aperture 2 | |
POLY | int | High coverage polygon flag: 1 if within high coverage polygon, 0 otherwise | |
REL | int | Reliability flag: 1 if both CSNR>1 and POLY=1, otherwise 0 |