arXiv:1703.09284·v1·High Energy Astrophysical Phenomena
Search for Gamma Ray Bursts with the ARGO-YBJ Detector in Shower Mode
B. Bartoli🇮🇹 · P. Bernardini🇮🇹 · X. J. Bi🇨🇳 · Z. Cao🇨🇳 · S. Catalanotti🇮🇹 · S. Z. Chen · T. L. Chen · S. W. Cui🇨🇳 · B. Z. Dai🇨🇳 · A. D Amone · Danzeng Luobu · I. De Mitri🇮🇹
Abstract
The ARGO-YBJ detector, located at the Yangbajing Cosmic Ray Laboratory (4300 m a. s. l., Tibet, China), was a full coverage air shower array dedicated to gamma ray astronomy and cosmic ray studies. The wide field of view (~ 2 sr) and high duty cycle (> 86%), made ARGO-YBJ suitable to search for short and unexpected gamma ray emissions like gamma ray bursts (GRBs). Between 2007 November 6 and 2013 February 7, 156 satellite-triggered GRBs (24 of them with known redshift) occurred within the ARGO-YBJ field of view. A search for possible emission associated to these GRBs has been made in the two energy ranges 10-100 GeV and 10-1000 GeV. No significant excess has been found in time coincidence with the satellite detections nor in a time window of one hour after the bursts. Taking into account the EBL absorption, upper limits to the energy fluence at 99% of confidence level have been evaluated,with values ranging from ~ 10-5 erg cm-2 to ~10-1 erg cm-2.
Comments: 24pages and 12 figures