/ftp/cats/I/224



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I/224   ==OBSOLETE version of Catalogue==
11-Nov-1998: See AC2000, I/247
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Query from: http://vizier.cds.unistra.fr/cgi-bin/VizieR?-source=I/224
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drwxr-xr-x 317 cats archive 8192 Feb 28 11:16 [Up] drwxr-xr-x 2 cats archive 216 Jan 12 2023 [TAR file] -rw-r--r-- 1 cats archive 371 Dec 19 2022 .message -rw-r--r-- 1 cats archive 31 Nov 11 1998 =obsolete= -r--r--r-- 1 cats archive 6023 Jul 13 1999 ReadMe -rw-r--r-- 1 cats archive 8285 Feb 24 1998 notes.gz [Uncompressed] -r--r--r-- 1 cats archive 5387947 Feb 26 1996 oxf1ac.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html]
Beginning of ReadMe : I/224 Oxford 1 AC Zone Data Reduced to ACRS (Urban+ 1996) ================================================================================ Oxford 1 AC Zone Data Reduced to ACRS Urban S. E., Martin J. C., and Corbin T. E. <U.S. Naval Obs., unpublished (1996)> ================================================================================ ADC_Keywords: Astrographic zones; Positional data; Historical catalog; Photographic catalog; Positional data; Regional catalog; Surveys; Cross identifications Abstract: The U.S. Naval Observatory is in the process of making new reductions of the Astrographic Catalogue (AC) using a modern reference system, the ACRS, which represents the system of the FK5. The data from the Oxford 1 Zone, whose plates are centered between declinations +25 and +31 degrees (eq. 1900), have been analyzed for scale, rotation, tilt, coma, magnitude equation, radial distortion and distortions introduced by the use of reseaux in the Carte du Ciel program. The result is a positional catalog of over 277,000 stars on eq. J2000.0, epoch of observation. Additionally, all stars have been matched with the Tycho Input Catalog (revised); those numbers have been added for additional identification purposes.