Speaker
Floriana Zefi
(LLR - Ecole Polytechnique)
Description
We report on evidence of simultaneous gamma-ray flaring from the BL Lac source B2 1215+30, detected by VERITAS (E > 100 GeV) and the Fermi Large Area Telescope (100 MeV < E <100 GeV). The source was observed by VERITAS during an exceptional flaring state in 2014 February 08. Investigations of flux variability in the energy range covered by Fermi-LAT, show that the GeV flare occurred contemporaneously with the TeV flare. From the variability time scale we constrain the size of the emission region and derive a limit on the Doppler factor of the relativistic jet of B2 1215+30.
Author
Floriana Zefi
(LLR - Ecole Polytechnique)
Co-authors
Prof.
Reshmi Mukherjee
(Barnard College, New York)
Dr
Stephen Fegan
(LLR-Ecole Polytechnique)
