Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990cha%26a..14..117z&link_type=abstract
Chinese Astronomy and Astrophysics, Volume 14, Issue 1, p. 117-117.
Astronomy and Astrophysics
Astrophysics
Quasars: Survey Of --
Scientific paper
This is the last in the series of papers on our visual search for QSO candidates, using low dispersion objective prism plates obtained with the UK Schmidt Telescope. We discuss and summarize some results at the current stage of this project. As a supplement to the Q >= 4 candidates published in the previous papers we give in this paper the subset of Q = 3 candidates which have ultraviolet excess. Our survey may suffer from many types of contamination since any object was considered as a QSO candidate if we could not unambiguously classify it as a star, a galaxy or some other known type of object. Despite this, many of our candidates are interesting enough for follow-up slit spectroscopy. This will also provide us with useful information for improving our selection criteria.
Present address: Department of Astronomy, University of Toronto, 60 St. George Street, Toronto, Ontario M5S 1A7, Canada.
Chen Jian-Sheng
Zhan Yin
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