Observations of a Major Outburst of BL Lacertae in the Active Galactic Nuclei Monitoring Program in the Center for Automated Space Science

Details Observations of a Major Outburst of BL Lacertae in the Active Galactic Nuclei Monitoring Program in the Center for Automated Space Science Observations of a Major Outburst of BL Lacertae in the Active Galactic Nuclei Monitoring Program in the Center for Automated Space Science

Feb 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998taas....2...57c&link_type=abstract

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

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Active Galactic Nuclei, Bl Lacertae Objects, Astronomical Photometry, Optical Properties, Astronomical Observatories, Ccd Cameras, Photometers, Optical Measurement

Scientific paper

BL Lacertae (BL Lac) is the prototype for a class of Active Galactic Nuclei (AGN) known as BL Lac objects. These objects are characterized by a featureless optical continuum that is both highly polarized and extremely variable. Historically, this object is known to have an optical variability range of 5 magnitudes (Webb, et al., 1987, Carini, et al. 1992) and exhibits episodic periods in which the source is observed to be bright (V = 12.0) and other periods when the source is observed to be quite faint (V = 16.5). In May, 1997, we found, in the course of our routine monitoring of these objects, that BL Lac was in an elevated state, with a V magnitude peaking near V = 12.5. The purpose of this paper is to report on our observations of the behavior of the optical continuum flux of BL Lac during this major outburst.

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