Comments on the precessing binary model of the BL Lac object OJ 287

Details Comments on the precessing binary model of the BL Lac object OJ 287 Comments on the precessing binary model of the BL Lac object OJ 287

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...195...25c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 195, no. 1-2, April 1988, p. 25, 26.

Astronomy and Astrophysics

Astronomy

5

Accretion Disks, Bl Lacertae Objects, Black Holes (Astronomy), Eclipsing Binary Stars, Light Curve, Quasars, Stellar Flares

Scientific paper

Photometric observations of OJ 287, obtained on 103 aO plates with a GG 13 blue filter using the 1-m Cassegrain reflector of the Lindheimer Astronomical Research Center at Northwestern University during February-May 1987, are reported. The data are presented in a table and a light curve and briefly characterized. A possible broad minimum with total depth greater than 1 mag in B is noted, although the light curve can also be interpreted as random fluctuations during a relatively quiescent period. It is pointed out that the validity of the precessing-binary model proposed by Sillanpaa et al. (1986 and 1987) for this object would be confirmed if the present apparent minimum were followed by another in June 1988.

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