Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003ycat..80790675b&link_type=abstract
VizieR On-line Data Catalog: J/AZh/79/675. Originally published in: 2002AZh....79..675B; 2002ARep...46..609B
Astronomy and Astrophysics
Astronomy
Radio Sources, Qsos, Photometry: Ubv
Scientific paper
The results of 19-year optical monitoring of ON 231 are presented. Photographic B-band observations were obtained during 123 nights from April 1972 to March 1990 as part of the quasar monitoring program carried out the Astronomical Institute of St. Petersburg State University.
(1 data file).
Babadzhanyants M. K.
Belokon' E. T.
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