The Microvariability of BL Lac During the 1997-1999 Outburst

Details The Microvariability of BL Lac During the 1997-1999 Outburst The Microvariability of BL Lac During the 1997-1999 Outburst

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...195.1604f&link_type=abstract

American Astronomical Society, 195th AAS Meeting, #16.04; Bulletin of the American Astronomical Society, Vol. 31, p.1396

Astronomy and Astrophysics

Astronomy

Scientific paper

A substantial change in the character of the variability of BL Lacertae was observed near the beginning of the 1997 observing season. The source was observed to undergo a major outburst of more than 3-mag beginning in May, 1997. This outburst is known to have been accompanied by at least one major gamma-ray event observed by EGRET. The source has remained at this elevated level for most of the past three years. Superposed on this major outburst were many extremely rapid variations which have amplitudes of 0.1-1.0 mag. and durations spanning timescales of less than one hour to several days. The results of our monitoring of this source will be presented and the nature of the variations discussed. Implications of these variations for the source structure and physical emission processes will also be discussed. The authors gratefully acknowledge support from the RPE fund at Georgia State University and support from NASA.

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