Intranight Variability During the 1997 Outburst of BL Lac

Details Intranight Variability During the 1997 Outburst of BL Lac Intranight Variability During the 1997 Outburst of BL Lac

Feb 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998taas....2..685c&link_type=abstract

NASA University Research Centers Technical Advances in Aeronautics, Space Sciences and Technology, Earth Systems Sciences, Globa

Physics

Variability, Bl Lacertae Objects, Active Galactic Nuclei, Charge Coupled Devices, Ccd Star Tracker, Ccd Cameras, Observatories, Telescopes

Scientific paper

The blazar BL Lac underwent a major outburst this summer. To search for intranight variability during the outburst, observations of BL Lac were made with the 30 inch telescope at the University of Florida's Rosemary Hill Observatory. During ten nights in July, nearly 300 CCD observations were made. BL Lac was seen to vary by more than 1.5 magnitudes over those ten nights. Substantial intranight variability was also observed. For example, on July 29, BL Lac increased in brightness by more than 0.5 magnitude in less than 2.5 hours. The observations of BL Lac taken in July are reported here and discussed in relation to the models intended to explain intranight variability.

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