M15, an astrometric standard for CCD observations

¹ Observatoire de Bordeaux, URA 352, CNRS/INSU, F-33270 Floirac, France
² Sternwarte der Universität Bonn, Auf dem Hügel 71, 53121 Bonn, Germany

Send offprint request to: J. Colin

Received: 4 May 1995
Accepted: 7 March 1996

Abstract

CCD observations of stars in the region of the globular cluster M15 have been used to obtain astrometric positions of 1092 stars in the central part of the cluster within the FK5 system. The purpose of this catalogue is to calibrate astrometrically CCD observations by means of measuring the positions of stars in M15. The comparison with other catalogues and with measurements of photographic plates of the central part of M15 indicates a mean accuracy of about 50 to 70 mas for each star of our catalogue.