THE GUIDE STAR CATALOG v1.0
An all-sky astrometric and photometric catalog prepared for the operation of the Hubble Space Telescope. (Copyright, 1989, Association of Universities for Research in Astronomy, Inc.). This set of CD-ROMs contains the Guide Star Catalog - Version 1, with an issue date of 1 June 1989. The Guide Star Catalog (GSC) was prepared by the Space Telescope Science Institute (ST ScI), 3700 San Martin Drive, Baltimore, MD 21218, USA. ST ScI is operated by the Association of Universities for Research in Astronomy, Inc. (AURA), under contract with the National Aeronautics and Space Administration (NASA).
The Guide Star Catalog is subdivided into regions, which are bounded by small circles of right ascension and great circles of declination, and which are numbered consecutively from 0001 to 9537. Data for each region are stored as separate files; these files are contained in subdirectories, each of which subtends a 7.5 degree zone of declination.
The Guide Star Catalog is distributed as a two CD-ROM set, divided at a declination of -7.5 degrees. This description file and supporting tables are duplicated on both discs. All data files (i.e., with the exception of this file and the directory files) are in FITS (Flexible Image Transport System) table format.
The root directory contains the following files:
Directory GSC contains subdirectories for the 7.5 degree zones in declination; these subdirectories in turn contain the GSC region files in FITS format for the respective zone, with file identifiers of the form nnnn.GSC;1, where nnnn is the 4-digit decimal region number, with leading zeroes used as required to fill the field. The subdirectories are named as follows:
Subdirectory Declination Regions Disc
From To From To
Directory TABLES contains the following supporting files for the GSC, written in FITS table format:
- Introduction and general comments.
Additional information on the Guide Star Catalog may be found in accompanying scientific publications and in comments in the FITS headers of the supporting tables.
Last Updated Jan 2001
Copyright © 1989-2001 The Association of Universities for Research in Astronomy, Inc. All Rights Reserved.