/ftp/cats/aliases/U/UCAC1/.



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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.u-strasbg.fr/viz-bin/VizieR?-source=I/268
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drwxr-xr-x 282 cats archive 8192 May 27 16:03 [Up] drwxr-xr-x 2 cats archive 4096 Dec 15 2013 [TAR file] -rw-r--r-- 1 cats archive 386 Feb 4 2006 .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) ================================================================================ 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)

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