Spitzer Extragalactic First Look Survey IRAC Four-Band Catalogs
Extragalactic FLS Overview
The Extragalactic First Look Survey is composed of 4 square degrees of imaging with MIPS and IRAC centered at J1718+5930,
with extensive ancillary data from ground-based optical and radio telescopes. As one of the first observations made with
Spitzer after the completion of Science Verification at the end of 2003 November, the aim of this 67 hr survey was to
characterize the extragalactic source populations observed with Spitzer down to sub-millijansky levels in the mid-infrared.
Details about the IRAC observations can be found in Lacy et al. (2005).
XFLS IRAC Four-Band Catalog Column Descriptions
IRSA serves XFLS IRAC Four-Band Catalogs for the Main and Verification fields of the XFLS
(19 columns, 12,224 data rows in the Verification field catalog, 103,193 data rows in the Main field).
| Name |
Intype |
Units |
Description |
| pix_x |
double |
|
x pixel coordinate in shortest wavelength mosaic |
| pix_y |
double |
|
y pixel coordinate in shortest wavelength mosaic |
| ra |
double |
deg |
Right Ascension (J2000) |
| dec |
double |
deg |
Declination (J2000) |
| ch1id |
int |
|
Source identification in 3.6 micron catalog |
| ch2id |
int |
|
Source identification in 4.5 micron catalog |
| ch3id |
int |
|
Source identification in 5.8 micron catalog |
| ch4id |
int |
|
Source identification in 8 micron catalog |
| ch1flux |
double |
microjy |
Flux density at 3.6 microns |
| errch1 |
double |
microjy |
Uncertainty in ch1flux |
| ch2flux |
double |
microjy |
Flux density at 4.5 microns |
| errch2 |
double |
microjy |
Uncertainty in ch2flux |
| ch3flux |
double |
microjy |
Flux density at 5.8 microns |
| errch3 |
double |
microjy |
Uncertainty in ch3flux |
| ch4flux |
double |
microjy |
Flux density at 8 microns |
| errch4 |
double |
microjy |
Uncertainty in ch4flux |
| aper |
double |
pixel |
Aperture used for flux density measurements |
| flag |
int |
|
Flag:
0 = More than 10\% area affected by bad pixels
1 = Object originally blended with another one
2 = At least one object pixel is saturated
3 = Object is truncated at image boundary
4 = Object's aperture data are incomplete or corrupted
5 = Object's isophotal data are incomplete or corrupted
6 = A memory overflow occurred during deblending
7 = A memory overflow occurred during extraction
8 = Region affected by muxbleed, pulldown, or banding
9 = Object in halo of bright star
10 = Object contaminated by latent image |
| dflg |
int |
|
Sum of detection flag bits:
0 = channel 1 detection
1 = channel 2 detection
2 = channel 3 detection
3 = channel 4 detection
|