Reduction of the Astrographic Catalogue, zone of S. Fernando

¹ Centro de Investigaciones de Astronomía CIDA, 5101-A Mérida, Venezuela
² Universidad Centro-Occidental Lisandro Alvarado UCLA, Barquisimeto, Venezuela
³ Real Instituto y Observatorio de la Armada de S. Fernando R0A, 11100 S. Fernando, (Cádiz) Spain

Send offprint request to: C. Abad

Received: 26 March 1998
Accepted: 24 April 1998

Abstract

The San Fernando Zone of the Astrographic Catalogue is reduced to the HIPPARCOS system in order to test a reduction model previously presented by Abad (1993). A new method for the determination of field distortion and magnitude or color dependent systematic errors on photographic plates is discussed.