J/AZh/79/675 B-band photometry of BL Lac object ON 231 (Babadzhanyants+, 2002)
Optical monitoring of the BL Lac object ON 231 in 1971-1990.
Babadzhanyants M.K., Belokon' E.T.
<Astron. Zh. 79, 675 (2002)>
=2002AZh....79..675B 2002AZh....79..675B
=2002ARep...46..609B 2002ARep...46..609B
ADC_Keywords: Radio sources; QSOs; Photometry, UBV
Abstract:
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.
Objects:
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RA (2000) DE Designation(s)
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12 21 31.69 +28 13 58.5 ON 231 = QSO B1219+285 = W Com
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File Summary:
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File name Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 40 251 B-band photometry of ON 231
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Byte-by-byte Description of files: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 "DD/MM/YYYY" Date Observation date
15- 25 F11.3 d HJD Heliocentric Julian date
28 A1 --- l_Bmag [>] Limit flag on Bmag
29- 33 F5.2 mag Bmag B magnitude
36- 39 F4.2 mag e_Bmag ? Uncertainty in B magnitude
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(End) Veta Avedisova (INASAN) 15-Feb-2003