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I/268 ==OBSOLETE version of Catalogue==
31-Oct-2003: (by Francois Ochsenbein) See I/289
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Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=I/268
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drwxr-xr-x 317 cats archive 8192 Feb 28 11:16 [Up]
drwxr-xr-x 2 cats archive 317 Jan 13 2023 [TAR file]
-rw-r--r-- 1 cats archive 388 Dec 19 2022 .message
-rw-r--r-- 1 cats archive 48 Oct 31 2003 =obsolete=
-r--r--r-- 1 cats archive 5076 Mar 13 2002 ReadMe
drwxr-xr-x 6 cats archive 4096 Sep 14 2010 UCAC1
-r--r--r-- 1 cats archive 18181 Jun 11 2001 intro.txt
-r--r--r-- 1 cats archive 8900 Jun 8 2001 out.sam Beginning of ReadMe :I/268 UCAC1 Catalogue (Zacharias+ 2000)
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First U.S. Naval Observatory CCD Astrograph Catalog (UCAC1)
Zacharias N., Urban S.E., Zacharias M.I., Hall D.M., Wycoff G.L.,
Rafferty T.J., Germain M.E., Holdenried E.R., Pohlman J.W., Gauss F.S.,
Monet D.G., Winter L.
<Astron. J. 120, 2131-2147 (2000)>
=2000AJ....120.2131Z
================================================================================
ADC_Keywords: Surveys ; Positional data ; Proper motions
Description:
The UCAC1 is a high density, highly accurate, astrometric catalog of
over 27 million stars in the Southern Hemisphere in the magnitude
range of about 8 to 16. This version is the first release of an
ongoing project to observe the entire sky; for up-to-date information
see the Web page at http://ad.usno.navy.mil/ad/ucac/ .
The UCAC1 is a preliminary catalog. By avoiding all "problem cases"
(see details in the "intro.txt" file) it is not complete. Positions,
proper motions and errors are provided, together with approximate
magnitudes in the 579-642nm range. The positional precision is about
20 mas for 9 to 14 mag and 70 mas at 16th mag. The errors of the
proper motions are very heterogeneous, ranging from 1 to 35 mas/yr.
The UCAC is an observational program using the U.S. Naval Observatory
Twin Astrograph and a 4kx4k CCD camera, covering just over 1 square
degree per frame with a scale of 0.9"/pixel. Observations started in
January 1998 at Cerro Tololo Interamerican Observatory (CTIO) and are
continuing. This first catalog contains data observed through 07
November 1999 at which time about 80% of the Southern Hemisphere was
completed. Full sky coverage is expected by early 2003 after a
re-location of the instrument to the Northern Hemisphere planned for
early 2001.
The UCAC1 is also available on CD-ROM from the US Naval Observatory.
Direct request to with UCAC1 in the
subject string.
Notice:
The data are freely available; however, any publication utilizing
these data should make proper reference to USNO and the paper
by Zacharias et al. (2000AJ....120.2131Z)