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The LQAC-4, last update of the Large Quasar Astrometric Catalogue

Published online by Cambridge University Press:  07 March 2018

J. Souchay ,
A. H. Andrei ,
C. Barache ,
F. Taris ,
C. Gattano  and
B. Coelho
J. Souchay
Affiliation:
SYRTE, Observatoire de Paris PSL research Univ., CNRS Sorbonne Univ. Paris 06, LNE 61, avenue de l'observatoire, 75014 Paris, France email: Jean.Souchay@obspm.fr
A. H. Andrei
Affiliation:
Observ. do Valongo, Universidade Federal do Rio de Janeiro Ladeira Pedro Antonio 43, Saude, Rio de Janeiro-REJ, CEP 20080-90, Brazil email: bcoelho@astro.ufrj.br
C. Barache
Affiliation:
SYRTE, Observatoire de Paris PSL research Univ., CNRS Sorbonne Univ. Paris 06, LNE 61, avenue de l'observatoire, 75014 Paris, France email: Jean.Souchay@obspm.fr
F. Taris
Affiliation:
SYRTE, Observatoire de Paris PSL research Univ., CNRS Sorbonne Univ. Paris 06, LNE 61, avenue de l'observatoire, 75014 Paris, France email: Jean.Souchay@obspm.fr
C. Gattano
Affiliation:
SYRTE, Observatoire de Paris PSL research Univ., CNRS Sorbonne Univ. Paris 06, LNE 61, avenue de l'observatoire, 75014 Paris, France email: Jean.Souchay@obspm.fr
B. Coelho
Affiliation:
Observ. do Valongo, Universidade Federal do Rio de Janeiro Ladeira Pedro Antonio 43, Saude, Rio de Janeiro-REJ, CEP 20080-90, Brazil email: bcoelho@astro.ufrj.br
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Abstract

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Thanks to their point-like structure and to their lack of significant proper motion, quasars represent the ideal objects for modeling quasi-inertial directions in space. For that reason the present primary conventional reference frame, the ICRF-2, is constructed from the set of the celestial coordinates of a sample of extragalactic objects, whose the very large majority are quasars. Thus any newly discovered quasar must be considered as a potential future ideal astrometric marker. Therefore compiling all the recorded quasars at a given epoch looks as a useful task. This constitutes the aim of the LQAC (Large Quasar Astrometric Catalogue). We present here the contents of the future release of this catalogue quoted as the LQAC-4, insisting on the related strategy of compilation. Preliminary results concerning the cross-identification with the Gaia DR1 catalogue are emphasized

Keywords

quasars : generalcatalogssurveys
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S330: Astrometry and Astrophysics in the Gaia sky , April 2017 , pp. 75 - 78
Copyright
Copyright © International Astronomical Union 2018 

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