Evidence for TeV Emission from GRB 970417a
Abstract
Milagrito, a detector sensitive to very high energy gamma rays, monitored the northern sky from February 1997 through May 1998. With a large field of view and a high duty cycle, this instrument was well suited to perform a search for TeV gamma-ray bursts (GRBs). We report on a search made for TeV counterparts to GRBs observed by BATSE. BATSE detected 54 GRBs within the field of view of Milagrito during this period. An excess of events coincident in time and space with one of these bursts, GRB 970417a, was observed by Milagrito. The excess has a chance probability of of being a fluctuation of the background. The probability for observing an excess at least this large from any of the 54 bursts is . No significant correlations were detected from the other bursts.
Keywords
Cite
@article{arxiv.astro-ph/0001111,
title = {Evidence for TeV Emission from GRB 970417a},
author = {The Milagro Collaboration and R. Atkins and W. Benbow and D. Berley and M. L. Chen and D. G. Coyne and B. L. Dingus and D. E. Dorfan and R. W. Ellsworth and D. Evans and A. Falcone and L. Fleysher and R. Fleysher and G. Gisler and J. A. Goodman and T. J. Haines and C. M. Hoffman and S. Hugenberger and L. A. Kelley and I. Leonor and M. McConnell and J. F. McCullough and J. E. McEnery and R. S. Miller and A. I. Mincer and M. F. Morales and P. Nemethy and J. M. Ryan and B. Shen and A. Shoup and C. Sinnis and A. J. Smith and G. W. Sullivan and T. Tumer and K. Wang and M. O. Wascko and S. Westerhoff and D. A. Williams and T. Yang and G. B. Yodh},
journal= {arXiv preprint arXiv:astro-ph/0001111},
year = {2007}
}
Comments
10 pages, 3 figures