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VERITAS Discovery of VHE Gamma-Ray Emission from BL Lac object RGB J0710+591

ATEL # 1941; Rene Ong (UCLA) for the VERITAS Collaboration
on 25 Feb 2009; 0:32 UT
Distributed as an Instant Email Notice (Request for Observations)
Password Certification: Philip Kaaret (

Subjects: >GeV, Request for Observations, AGN

The VERITAS collaboration reports the discovery of very high energy (VHE; E>100 GeV) gamma-ray emission from the BL Lac object RGB J0710+591 (z=0.125). This new VHE source was observed for ~18 hours good-quality live time between 3 January and 23 February 2009 (UT) with the VERITAS atmospheric-Cherenkov telescope array. Preliminary analysis of these data yields a detection of ~100 gamma-rays from RGB J0710+591 corresponding to a significance of >5 standard deviations. The VHE flux is ~1.6% of the Crab above 300 GeV, and there is no evidence of flux variability. VERITAS will continue to observe RGB J0710+591 and contemporaneous multi-wavelength observations of this blazar are encouraged.

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R. E. Rutledge , Editor
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