Swift follow-up of the gamma-ray flaring BL Lac CGRaBS J0211+1051
Abstract
Following the gamma-ray flare of the BL Lac object CGRaBS J0211+1051 (also known as MG1 J021114+1051, and 1FGL J0211.2+1049, Abdo et al. 2010, ApJS, 188, 405) detected by Fermi LAT on 2011 January 23 (ATel #3120), we performed a Swift target of opportunity observation on January 25. Swift/UVOT observations found CGRaBS J0211+1051 about 1.3 mag brighter in U band (U = 13.77+/-0.03) and 1.4 mag in W2 band (W2 = 14.44+/-0.04) compared to the UVOT observation performed on 2010 March 5 (U = 15.02+/-0.03; W2 = 15.82+/-0.06).
- Publication:
-
The Astronomer's Telegram
- Pub Date:
- January 2011
- Bibcode:
- 2011ATel.3129....1D
- Keywords:
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- Optical;
- Ultra-Violet;
- X-ray;
- Blazar