Second Data Release - September 2002
NOTE: This page provides details specific to this data release. Please look at common ground for more information. ALL data will be reprocessed uniformly at the end of the survey.
Second Release (September 2002)
| Subfield | Catalog | FITS Images | JPEG (from BVR) |
JPEG (from Rz) |
| F2p11 | F2p11.cat.gz | B , V , R , z' | F2p11BVR.jpg (~ 3.0 MB) |
F2p11Rz.jpg (~ 2.5 MB) |
| F2p12 | F2p12.cat.gz | B , V , R , z' | F2p12BVR.jpg (~ 3.0 MB) |
F2p12Rz.jpg (~ 2.5 MB) |
| F4p11 | F4p11.cat.gz | B , V , R , z' | F4p11BVR.jpg (~ 3.0 MB) |
F4p11Rz.jpg (~ 2.5 MB) |
| F4p21 | F4p21.cat.gz | B , V , R , z' | F4p21BVR.jpg (~ 3.0 MB) |
F4p21Rz.jpg (~ 2.5 MB) |
| F4p33 | F4p33.cat.gz | B , V , R , z' | F4p33BVR.jpg (~ 3.0 MB) |
F4p33Rz.jpg (~ 2.5 MB) |
These catalogs differ in two ways from the previous release:
(1) Objects are detected individually in each band and thenmatched; and
(2) aperture magnitude are measured within a RADIUS =10 pixels (not 5!).
As a result not every object has information in all 4 bands.
The catalogs are produced by SExtractor (version 2.1.6) using the parameter files default.sex and default.conv.
More details about SExtractor can be found here. The catalog for each subfield is contained in a gzipped ascii file, one object per line, with the following space-separated columns:
| Column Name | Meaning |
| Alpha | right ascension (2000.0) |
| Delta | declination (2000.0) |
| X | x intensity weighted centroid |
| Y | y intensity weighted centroid |
| A | semi-major axis |
| B | semi-minor axis |
| THETA | position angle |
| FLAGS | SExtractor flags Note: use objects with FLAGS != 0 at your own risk! In particular, do not use the total magnitudes of objects with flags including 1. |
| MAG_APER | aperture magnitude (diameter = 20 pixels ~ 5.14 arcsec) |
| MAGERR_APER | aperture magnitude error |
| MAG | total magnitude |
| MAGERR | total magnitude error |
| MAG_ISO | isophotal magnitude |
| MAGERR_ISO | isophotal magnitude error |
| ISOAREA | isophotal area |
The columns are listed once for each photometric band in the order BVRz'.
