Multiband CCD photometry of BL Lacertae

Details Multiband CCD photometry of BL Lacertae Multiband CCD photometry of BL Lacertae

Jan 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001iaus..205...82k&link_type=abstract

Galaxies and their Constituents at the Highest Angular Resolutions, Proceedings of IAU Symposium #205, held 15-18 August 2000 at

Physics

2

Scientific paper

We present preliminary results of the optical observations of BL Lacertae during the period from 1997 to 1999 carried out with ST-6 CCD Camera attached to the newtonian focus of the 70-cm meniscus telescope of the Abastumani Observatory. The frames were obtained in BVRI filters, which match the standart system well. The aim of these observations is to study long-term, intranight and microvariability of BL Lac. The intranight and microvariability were studied on the bases of more than hundred nights observations, while the long-term variability during 150 nights. On the bases these observations it were demonstrated that BL Lacertae shows the short time scale variability in R band within 0.071 (.007)-0.30 (.02) mag. The maximum amplitude in BVR bands are equal to 2.99, 2.67 and 2.52 respectively.

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