Corrected GSC: Reference catalogue for CCD observations

Author(s): Lopez Garcia, A; Yagudin, LI

Book Editor(s): FerrazMello, S; Morando, B; Arlot, JE

Conference: 172nd Symposium of the International-Astronomical-Union on Dynamics, Ephemerides and Astrometry of the Solar System Location: PARIS, FRANCE Date: JUL 03-08, 1995

Sponsor(s): Int Astron Union

Source: DYNAMICS, EPHEMERIDES AND ASTROMETRY OF THE SOLAR SYSTEM  Book Series: IAU SYMPOSIA   Issue: 172   Pages: 483-486   Published: 1996

Astrometrical properties of the Hubble Space Telescope Guide Star Catalogue (GSC) were recently investigated by the same authors through its comparison with the PPM catalogue. In this paper, a new systematic plate-based magnitude dependent error produced by telescope optics and by the incompleteness of plate reduction model has been found after applying a simplified block adjustment procedure. New subroutine for correction of all systematic errors is developed and GSC can be used now as a dense reference catalogue on about 0.4» accuracy level.