NEW REDUCTIONS OF THE ASTROGRAPHIC CATALOG - CONVENTIONAL PLATE ADJUSTMENT OF THE CAPE-ZONE

Citation
Se. Urban et Te. Corbin, NEW REDUCTIONS OF THE ASTROGRAPHIC CATALOG - CONVENTIONAL PLATE ADJUSTMENT OF THE CAPE-ZONE, Astronomy and astrophysics, 305(3), 1996, pp. 989-998
Citations number
17
Categorie Soggetti
Astronomy & Astrophysics
Journal title
ISSN journal
00046361
Volume
305
Issue
3
Year of publication
1996
Pages
989 - 998
Database
ISI
SICI code
0004-6361(1996)305:3<989:NROTAC>2.0.ZU;2-D
Abstract
The U. S. Naval Observatory is in the process of making new reductions of the Astrographic Catalogue using a modern reference star system, t he ACRS, created specifically for that purpose. The application of tha t system to the plates of the Cape Zone is discussed as well as the so ftware that has been developed to make the reductions. An analysis of scale, rotation, tilt, coma, magnitude equation, radial distortion and distortions introduced by the use of reseaux in the Carte du Ciel pro gram is made for each plate. The result is a catalog of 544 629 stars from plates taken at the Cape Observatory between 1897 and 1911 on the system of FK5 J2000. The average standard deviations of an individual plate image after reduction are 0 ''.31 in right ascension and 0 ''.2 8 in declination. Thus the positions of the Cape Zone, and of the othe r zones subsequently to be reduced, can be combined with modern astrom etric catalogs to give accurate proper motions for large numbers of st ars.