CCD Photometry and Optical Variability of Gamma-Ray-loud BL Lacertae Object OJ 287 in a Low, Fainter State

Details CCD Photometry and Optical Variability of Gamma-Ray-loud BL Lacertae Object OJ 287 in a Low, Fainter State CCD Photometry and Optical Variability of Gamma-Ray-loud BL Lacertae Object OJ 287 in a Low, Fainter State

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aj....133.1995z&link_type=abstract

The Astronomical Journal, Volume 133, Issue 5, pp. 1995-2000.

Astronomy and Astrophysics

Astronomy

11

Bl Lacertae Objects: Individual: Oj 287, Galaxies: Active, Galaxies: Photometry

Scientific paper

We present optical photometry (V, R, and I) of the BL Lac object OJ 287 (0851+203, z=0.306), which was observed in a low, fainter state with the 1 m telescope at Yunnan Astronomical Observatory. Our results show significant short-term variability in the R band over 31 minutes. We find a strong correlation between the V-R color index and the magnitude in the R band. Our CCD photometry of OJ 287 is in good agreement with the prediction of Sillanpää and coworkers of an optical variability period of about 11.6 yr.

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