Algiers AC Zone Data Reduced to ACRS (Urban+ 1995)

Details Algiers AC Zone Data Reduced to ACRS (Urban+ 1995) Algiers AC Zone Data Reduced to ACRS (Urban+ 1995)

Nov 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995ycat.1223....0u&link_type=abstract

VizieR On-line Data Catalog: I/223. Originally published in: unpublished (1995)

Astronomy and Astrophysics

Astronomy

Astrographic Zones, Combined Data, Cross Identifications, Finding Lists, Historical Catalog, Magnitudes: Photographic, Photographic Catalog, Plate Areas, Plate Data, Positional Data, Regional Catalog, Surveys

Scientific paper

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 Algiers Zone, whose plates are centered between declinations -2 and +4 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 199,000 stars on eq. J2000.0, epoch of observation. The plate were exposed between 1891 and 1912. For cross-identification purposes, all stars have been matched with the Tycho Input Catalog (revised); those numbers have been added to each record. (2 data files).

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