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QSOs from a Variability-and-Proper Motion Survey

Published online by Cambridge University Press:  12 April 2016

Helmut Meusinger ,
Jens Brunzendorf ,
Ralf-Dieter Scholz  and
Mike Irwin
Helmut Meusinger
Affiliation:
Thüringer Landessternwarte Tautenburg, D-07778 Tautenburg, Germany
Jens Brunzendorf
Affiliation:
Thüringer Landessternwarte Tautenburg, D-07778 Tautenburg, Germany
Ralf-Dieter Scholz
Affiliation:
Astrophysikalisches ches Insatitut Potsdam, An der Sternwarte 16, D-14482 Potsdam, Germany
Mike Irwin
Affiliation:
Institute of Astronomy, Madingley Road, Cambridge CB3 1HA, UK

Abstract

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We report on a search for QSOs via variability and zero-proper motion. Candidates were selected by means of indices for overall variability, long-term variability, proper motion and image structure measured on a large number of Schmidt plates with a time-baseline of three decades. Spectroscopic follow-up observations of the candidates brighter than the pre-estimated completeness limit, Blim ≈ 19.7, of the survey revealed about 200 QSOs and Seyfert 1s with redshifts z ≈ 0 — 3. We describe the survey strategy and discuss the properties of the resulting QSO sample.

Type
Part 1. Optical Surveys for AGN
Information
International Astronomical Union Colloquium , Volume 184: AGN Surveys , 2002 , pp. 69 - 74
Copyright
Copyright © Astronomical Society of the Pacific 2002

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