/ftp/cats/I/255



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I/255           The HST Guide Star Catalog, Version GSC-ACT (Lasker+ 1996-99)
Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=I/255
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drwxr-xr-x 317 cats archive 8192 Feb 28 11:16 [Up] drwxr-xr-x 2 cats archive 231 Jan 12 2023 [TAR file] -rw-r--r-- 1 cats archive 298 Dec 19 2022 .message drwxr-xr-x 28 cats archive 4096 Sep 14 2010 GSC_ACT -r--r--r-- 1 cats archive 7271 Aug 12 2019 ReadMe -r--r--r-- 1 cats archive 6900 Sep 15 1999 out.sam -r--r--r-- 1 cats archive 49244 Mar 9 1999 regions.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html]
Beginning of ReadMe : I/255 The HST Guide Star Catalog, Version GSC-ACT (Lasker+ 1996-99) ================================================================================ The Guide Star Catalog Version 1.1-ACT (GSC-ACT Catalogue) Lasker B.M., Russel J.N., Jenkner H. <The Association of Universities for Research in Astronomy, Inc. ([c] 1989, 1992, 1996)> The Guide Star Catalog Version 1.0 is described in a series of papers: I. Astronomical foundations and image processing Lasker B.M., Sturch C.R., McLean B.J., Russell J.L., Jenkner H., Shara M.M. <Astron. J., 99, 2019 (1990)> =1990AJ.....99.2019L II. Photometric and astrometric models and solutions Russell J.L., Lasker B.M., McLean B.J., Sturch C.R., Jenkner H. <Astron. J., 99, 2059-2081 (1990)> =1990AJ.....99.2059R III. Production, database organization, and population statistics Jenkner H., Lasker B.M., Sturch C.R., McLean B.J., Shara M.M., Russell J.L. <Astron. J., 99, 2082 (1990)> =1990AJ.....99.2082J ================================================================================ ADC_Keywords: Surveys ; Positional data Description: The Guide Star Catalog (GSC), which has been constructed to support the operational need of the Hubble Space Telescope contains nearly 19 million objects brighter than sixteenth magnitude, of which more than 15 million are classified as stars. This catalog provides positions and magnitudes for these stars. The original version of this catalog, GSC 1.0, is described in a series of papers: Lasker et al. (1990AJ.....99.2019L); Russell et al. (1990AJ.....99.2059R); and Jenkner et al. (1990AJ.....99.2082J) The reference material for the GSC 1.2 reduction is the "Positions and Proper Motions Catalogue": PPM-North, Roeser S. and Bastian U., 1988, Cat. I/146 PPM-South, Bastian U. and Roeser S., 1993, Cat. I/193 PPM-Suppl, Roeser S., Bastian U. and Kuzmin A., 1994, Cat. I/208 and the Astrographic Catalogue (AC) which was used to remove the mean systematics common to all the plates. The GSC GSC-ACT is a recalibration of GSC1.1 using the ACT (Astrographic Catalog/Tycho, catalog I/246) performed by the Project Pluto ("See also" section below). The "plate RMS" values are given at http://www.projectpluto.com/results.txt, with most plates coming in at under .3 arcseconds