Fermi Gamma-ray Space Telescope

Constraints on Very High Energy Emission from GRB 130427A

Jeremy Perkins
Taylor Aune, Sylvia Zhu and Peter Veres for the Fermi LAT and VERITAS Collaborations

Abstract:

VERITAS, a ground-based imaging atmospheric Cherenkov telescope array, began follow-up observations of GRB 130427A ∼71 ks (∼20 hours) after the onset of the burst. The GRB was not detected with VERITAS; however, the high elevation of the observations, coupled with the low redshift of the GRB, makes VERITAS a very sensitive probe of the emission from GRB 130427A for E > 100 GeV. The non-detection and consequent derived upper limit place constraints on the synchrotron self-Compton model of high-energy gamma-ray emission from this burst. This contribution will provide an overview of the VERITAS GRB observing program and describe the high- and very-high-energy observations of GRB 130427A.