Evidence for TeV Emission from GRB 970417a

Authors

R Atkins, University of UtahFollow
W Benbow, University of California - Santa Cruz
M L. Chen, University of Maryland - College Park
D G. Coyne, University of California - Santa Cruz
B L. Dingus, University of UtahFollow
D E. Dorfan, University of California - Santa Cruz
R W. Ellsworth, George Mason University
D Evans, University of Maryland - College Park
A Falcone, University of New Hampshire - Main CampusFollow
L Fleysher, New York UniversityFollow
R Fleysher, New York UniversityFollow
G Gisler, Los Alamos National Laboratory
J A. Goodman, University of Maryland - College Park
T J. Haines, Los Alamos National LaboratoryFollow
C M. Hoffman, Los Alamos National Laboratory
S Hugenberger, University of California - Irvine
L A. Kelley, University of California - Santa Cruz
I Leonor, University of California - Irvine
Mark L. McConnell, University of New Hampshire - Main CampusFollow
J F. McCullough, University of California - Santa Cruz
J E. McEnery, University of UtahFollow
R S. Miller, University of New Hampshire - Main CampusFollow
A I. Mincer, New York University
M F. Morales, University of California - Santa CruzFollow
P Nemethy, New York University
James M. Ryan, University of New HampshireFollow
B Shen, University of California - Riverside
A Shoup, University of California - Irvine
C Sinnis, Los Alamos National Laboratory
A J. Smith, University of Maryland - College ParkFollow
G W. Sullivan, University of Maryland - College Park
O T. Tumer, University of California - Riverside
K Wang, University of California - Riverside
M O. Wascko, University of California - Riverside
S Westerhoff, University of California - Santa Cruz
D A. Williams, University of California - Santa CruzFollow
T Yang, University of California - Santa Cruz
G B. Yodh, University of California - Irvine

Abstract

Milagrito, a detector sensitive to very high energy gamma rays, monitored the northern sky from 1997 February through 1998 May. 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 thisperiod. 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 2.8 × 10^-5 of being a fluctuation of the background. The probability for observing an excess at least this large from any of the 54 bursts is 1.5 × 10^-3. No significant correlations were detected from the other bursts.

Department

Space Science Center, Physics

Publication Date

4-20-2000

Journal Title

The Astrophysical Journal Letters

Publisher

The American Astronomical Society

Document Type

Article

Recommended Citation

Atkins, R; Benbow, W; Chen, M L.; Coyne, D G.; Dingus, B L.; Dorfan, D E.; Ellsworth, R W.; Evans, D; Falcone, A; Fleysher, L; Fleysher, R; Gisler, G; Goodman, J A.; Haines, T J.; Hoffman, C M.; Hugenberger, S; Kelley, L A.; Leonor, I; McConnell, Mark L.; McCullough, J F.; McEnery, J E.; Miller, R S.; Mincer, A I.; Morales, M F.; Nemethy, P; Ryan, James M.; Shen, B; Shoup, A; Sinnis, C; Smith, A J.; Sullivan, G W.; Tumer, O T.; Wang, K; Wascko, M O.; Westerhoff, S; Williams, D A.; Yang, T; and Yodh, G B., "Evidence for TeV Emission from GRB 970417a" (2000). The Astrophysical Journal Letters. 35.
https://scholars.unh.edu/ssc/35

Rights

© 2000. The American Astronomical Society. All rights reserved. Printed in U.S.A.