Fermi Gamma-ray Space Telescope

Prospects for Gamma-Ray Bursts detection by the Cherenkov Telescope Array

E. Bissaldi
T. Di Girolamo, F. Di Pierro, F. Longo, P. Vallania, C. F. Vigorito, for the CTA Consortium

Abstract:

The first Gamma-Ray Burst (GRB) catalog presented by the Fermi-Large Area Telescope (LAT) collaboration includes 28 GRBs, detected above 100 MeV over the first three years since the launch of the Fermi mission. However, more than 100 GRBs are expected to be found over a period of six years of data collection thanks to a new detection algorithm and to the development of the new LAT event reconstruction ?Pass 8?. Our aim is to provide revised prospects for GRB alerts in the Cherenkov Telescope Array (CTA) era in light of these new LAT discoveries. We initially focus on the possibility of high?energy GRB detection with the full CTA array by simulating the observation of two extremely bright test cases, GRB 130427A and GRB 090510. Furthermore we investigate how these GRBs would be seen by part of the array (e.g. only by the Large Size Telescopes, or by a subsample of the Mid?sized Telescopes) pointing initially towards different directions.