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: http://www.stsci.edu/science/goods/catalogs/r1.1z_readme.html
Дата изменения: Wed May 5 00:40:37 2004 Дата индексирования: Sat Dec 22 15:19:43 2007 Кодировка: Поисковые слова: m 8 |
On Friday, April 9 2004, at 5pm EDT, the GOODS Teams released the version r1.1 of the ACS multi-band source catalogs.
These catalogs, prepared using the SExtractor package (Bertin & Arnouts 1996, A&A 117, 393), are based on the version v1.0 of the reduced, calibrated, stacked and mosaiced images acquired with HST and ACS as part of the GOODS ACS Treasury program.
The catalogs are z-band based, that is, source detection has been
made using
the z-band images. A variety of photometric apertures defined during
the
detection process have then been used as "fixed apertures" in the i, v
and
b-band images to derive the multi-band photometry.
The r1.1z release of the multi-band source catalogs comprises: eight (8) primary ASCII files (the updated catalogs); one (1) updated file required to configure SExtractor; and this "README" file.
The eight primary files are named:
Groups of letters, numbers or punctuation symbols separated by underscore ("_") are used to specify the main parameter of the catalogs.
The prefix "h" is used in the STScI multimission archive to indicate HST data products.
The second group the survey identifier.
The first letter of the following two-letter group indicates which GOODS field is catalogued (values are either "s" for GOODS-S, or "n" for GOODS-N), while the second letter indicates the photometric passband (values are "b", "v", "i" and "z").
The group "r1.1z" specifies that this is the release 1.1 of the catalogs and that detections are based on the z band.
The following group "_cat" specifies the nature of the data product (source catalog).
The extension ".txt" specifies that the catalogs consist of text ASCII files.
The updated SExtractor configuration file is
This file specifies the list of
columns output by SExtractor in its photometry runs, replacing the
prior release file h_goods_r1.0z_phot_param.txt.
All other r1.0z SExtractor configuration files (listed in the r1.0z release notes) are still valid, and
have not been
replaced or copied to r1.1z filenames.
We refer the reader to the original documentation provided with the
SExtractor
package for the meaning and content of the various configuration files.
3.0 Changes from the r1.0z release
The r1.1z release is based upon the r1.0z SExtractor run, and merely corrects errors and omissions in the r1.0z catalog files. The catalogued sources are identical, in both number and ordering, to the r1.0z release.# 1 ID_IAU
# 2 ALPHA_J2000
# 3 DELTA_J2000
# 4 SECT_REFNUM
# 5 X_SECT
# 6 Y_SECT
# 7 X_MOSAIC
# 8 Y_MOSAIC
# 9 XPEAK_MOSAIC
# 10 YPEAK_MOSAIC
# 11 XPEAK_WORLD
# 12 YPEAK_WORLD
# 13 XMIN_MOSAIC
# 14 YMIN_MOSAIC
# 15 XMAX_MOSAIC
# 16 YMAX_MOSAIC
# 17 ISOAREAF_IMAGE
# 18 ISOAREA_IMAGE
# 19 THETA_IMAGE
# 20 ELLIPTICITY
# 21 ELONGATION
# 22 ERRTHETA_IMAGE
# 23 KRON_RADIUS
# 24 FLUX_RADIUS
# 27 FWHM_IMAGE
# 28 CLASS_STAR
# 29 FLAGS
# 30 IMAFLAGS_ISO
# 31 NIMAFLAGS_ISO
# 32 BACKGROUND
# 33 FLUX_MAX
# 34 MAG_ISO
# 35 MAGERR_ISO
# 36 FLUX_ISO
# 37 FLUXERR_ISO
# 38 MAG_ISOCOR
# 39 MAGERR_ISOCOR
# 40 FLUX_ISOCOR
# 41 FLUXERR_ISOCOR
# 42 MAG_AUTO
# 43 MAGERR_AUTO
# 44 FLUX_AUTO
# 45 FLUXERR_AUTO
# 46 MAG_BEST
# 47 MAGERR_BEST
# 48 FLUX_BEST
# 49 FLUXERR_BEST
# 50 MAG_APER
# 61 MAGERR_APER
# 72 FLUX_APER
# 83 FLUXERR_APER
# 94 X2_IMAGE
# 95 Y2_IMAGE
# 96 XY_IMAGE
# 97 ERRX2_IMAGE
# 98 ERRY2_IMAGE
# 99 ERRXY_IMAGE
# 100 A_IMAGE
# 101 B_IMAGE
# 102 ERRA_IMAGE
# 103 ERRB_IMAGE
# 104 ID_MOSAIC
A description of the GOODS observations and data products is given
in "The Great Observatories Origins Deep Survey: Initial Results from
Optical and Near-Infrared Imaging" by M. Giavalisco and the GOODS Team
[2004, ApJ, 600, L93]. Another paper describing in more details
the GOODS HST/ACS data and source catalogs is in preparation and, for
the time being, should be referenced as "M. Giavalisco and the GOODS
Team, 2004, in preparation".