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Astrometric Positions of Quasars by CCD Observations1

Published online by Cambridge University Press:  12 April 2016

M. Assafin ,
R. Vieira Martins  and
A.H. Andrei
M. Assafin
Affiliation:
Observatório do Valongo, Univ. Federal do Rio de Janeiro Rio de Janeiro, Brazil
R. Vieira Martins
Affiliation:
Observatório Nacional Rio de Janeiro – RJ, Brazil
A.H. Andrei
Affiliation:
Observatório Nacional Rio de Janeiro – RJ, Brazil

Abstract

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We present results of CCD observations for 85 quasars with −80° ≤ δ ≤ +20° declination, belonging to the International Celestial Reference System (ICRS). The positions are referred to the Carlsberg Series (CAMC) and PPM catalogues. We discuss a method which allows one to obtain precise positions based only on CCD observations, on the use of the Digitized Sky Survey of ST ScI and on the Guide Star Catalogue. The results are compared with the VLBI positions.

Type
Observational Techniques and Catalogues
Information
International Astronomical Union Colloquium , Volume 165: Dynamics and Astrometry of Natural and Artificial Celestial Bodies , 1997 , pp. 547 - 550
Copyright
Copyright © Kluwer 1997

Footnotes

1

Based on observations made at Laboratório Nacional de Astrofísica/CNPq/MCT

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