Short time scale variability of the BL Lac object OJ 287 in the near-infrared

Details Short time scale variability of the BL Lac object OJ 287 in the near-infrared Short time scale variability of the BL Lac object OJ 287 in the near-infrared

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989stin...9016603l&link_type=abstract

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Astronomy and Astrophysics

Astronomy

Bl Lacertae Objects, Extragalactic Radio Sources, Infrared Photometry, Infrared Sources (Astronomy), Near Infrared Radiation, Astronomical Photometry, Galaxies, Luminous Intensity, Root-Mean-Square Errors, Stellar Spectra, Temporal Distribution

Scientific paper

The results of a near infrared photometric monitoring of the BL Lacertae object OJ 287 are presented. The standard photometry of the J, H and K bands shows variability of maximum amplitude about 0.7 mag over the entire observing period of 23 months and about 0.3 mag on time intervals as short as 3 hours. No spectral variability is found. A fast monitoring performed in the H band, with a sampling period of approximately 4 minutes, provides evidence that variations can occur in this object. These variations show slow increasing and fast decreasing trends, but no clear indication of periodicity is available.

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