The Optical/Gamma Ray Variability of the Blazar OE 110

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

Significant optical variability has been observed during the past two years for the blazer, OE 110. This included a major outburst in 2010-11 with the maximum brightness detected of R=16.7. This represents a luminous state comparable the baseline state reported by Leacock et al. (1976). The optical outburst was accompanied by a quasi-simultaneous gamma-ray outburst. The historical optical light curves extending back to the mid-1970s show only one prior major outburst. However, only intermittent monitoring of OE 110 from 1975 - present is available due to the generally faint state of this source. Thus many of the reported detections in the past are not the true quiescent state for OE 110, but are peaks of rather modest 2 - 3 mag. optical flares from a quiescent state near R 22 mag. The results of the more than 30 years optical monitoring of this source is reported in addition to the correlated optical-gamma-ray variations detected during the 2010-2011 flare. This blazer exhibits the second largest range observed for any blazer of 6.2 mag.

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