/ftp/cats/I/228



*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
I/228   ==OBSOLETE version of Catalogue==
11-Nov-1998: Superseded by AC2000, I/247
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
Query from: http://vizier.cds.unistra.fr/cgi-bin/VizieR?-source=I/228
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*

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 381 Dec 19 2022 .message -rw-r--r-- 1 cats archive 41 Nov 11 1998 =obsolete= -r--r--r-- 1 cats archive 6073 Sep 13 2001 ReadMe -r--r--r-- 1 cats archive 4236249 Apr 2 1996 bordac.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 8031 Jul 26 1996 notes.gz [Uncompressed]
Beginning of ReadMe : I/228 Bordeaux AC Zone Data Reduced to ACRS (Urban+ 1996) ================================================================================ Bordeaux AC Zone Data Reduced to ACRS Urban S. E., Jackson E. S., and Corbin T. E. <U.S. Naval Obs., unpublished (1996)> ================================================================================ ADC_Keywords: Astrographic zones ; Historical catalog ; Magnitudes, photographic ; 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 Bordeaux Zone, whose plates are centered between declinations +11 and +17 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 223,000 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.