/ftp/cats/I/263



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J/AJ/118/2488       ACR catalog around Celestial Equator        (Stone+, 1999)
The following files can be converted to FITS (extension .fit .fgz or .fiZ)
	acr_*.dat table1.dat table8.dat
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Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=I/263
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drwxr-xr-x 317 cats archive 8192 Feb 28 11:16 [Up] drwxr-xr-x 2 cats archive 4096 Jan 13 2023 [TAR file] -rw-r--r-- 1 cats archive 482 Dec 19 2022 .message -r--r--r-- 1 cats archive 9675 Jun 13 2000 ReadMe -rw-r--r-- 1 cats archive 1235 Feb 16 2013 +footg5.gif -rw-r--r-- 1 cats archive 5150 Feb 16 2013 +footg8.gif -r--r--r-- 1 cats archive 567545 Jan 20 2000 acr_a.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 553118 Jan 20 2000 acr_b.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 769465 Jan 20 2000 acr_c.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 1137419 Jan 20 2000 acr_d.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 7582145 Jan 20 2000 acr_e.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 3103786 Jan 20 2000 acr_f.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 756658 Jan 20 2000 acr_g.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 649320 Jan 20 2000 acr_h.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 645600 Jan 20 2000 acr_i.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 724463 Jan 20 2000 acr_j.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 1356176 Jan 20 2000 acr_k.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 1878264 Jan 20 2000 acr_l.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 7014513 Jan 20 2000 acr_m.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 7473622 Jan 20 2000 acr_n.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 1321825 Jan 20 2000 acr_o.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 873361 Jan 20 2000 acr_p.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 600 Feb 23 2000 table1.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 248 Feb 23 2000 table8.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html]
Beginning of ReadMe : I/263 ACR catalog around Celestial Equator (Stone+, 1999) ================================================================================ Improved astrometric calibration regions along the celestial equator. Stone R.C., Pier J.R., Monet D.G. <Astron. J. 118, 2488 (1999)> =1999AJ....118.2488S ================================================================================ ADC_Keywords: Fundamental catalog ; Positional data ; Proper motions ; Magnitudes Keywords: astrometry - stars: general Abstract: We present improved and highly accurate International Celestial Reference System (ICRS) equatorial positions for 1,268,732 stars in 16 astrometric calibration regions located around the celestial equator. Each region is about 7.6degx3.2deg in area ( 24.3 deg^2^), contains a large number of stars (18,767 to 263,810), has stellar densities ranging from 765 to 10,772 stars deg^-2^, covers a wide range in magnitude (9.5<R<17.8, or equivalently 10.0<V<18.3), and is complete to magnitude R 17.2 (V 17.7). All of the observations were taken in 1994-1998 (mean epoch J1996.0) with the Flagstaff Astrometric Scanning Transit Telescope. Furthermore, each region was observed many times with overlapped CCD strip scans, and these data were reduced to star positions using differential reductions. The reference-star positions were taken from the ACT catalog of accurate star positions and proper motions. The star positions presented herein are typically accurate to +/-26mas (+/-12mas precision) in both right ascension and declination, except for the faintest stars, whose errors are about 2 times larger. Similarly, magnitudes were determined for the astrometric calibration stars using standard photometric reductions, and accuracies of +/-18mmag (+/-10mmag precisions) were achieved (about +/-46mmag for the faintest stars)