The high-energy gamma-ray fluence and energy spectrum of GRB 970417a from observations with Milagrito

R. Atkins, W. Benbow, D. Berley, M. L. Chen, D. G. Coyne, B. L. Dingus, D. E. Dorfan, R. W. Ellsworth, D. Evans, A. Falcone, L. Fleysher, R. Fleysher, G. Gisler, M. M. Gonzalez, J. A. Goodman, T. J. Haines, C. M. Hoffman, S. Hugenberger, L. A. Kelley, S. KleinI. Leonor, J. F. McCullough, J. E. McEnery, R. S. Miller, A. I. Mincer, M. F. Morales, P. Nemethy, J. M. Ryan, F. W. Samuelson, B. Shen, A. Shoup, C. Sinnis, A. J. Smith, G. W. Sullivan, T. Tumer, K. Wang, M. O. Wascko, S. Westerhoff, D. A. Williams, T. Yang, G. B. Yodh

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Abstract

Evidence of TeV emission from GRB 970417a has been previously reported using data from the Milagrito detector. Constraints on the TeV fluence and the energy spectrum are now derived using additional data from a sealer system that recorded the rate of signals from the Milagrito photomultipliers. This analysis shows that if emission from GRB 970417a has been observed, it must contain photons with energies above 650 GeV. Some consequences of this observation are discussed.

Original languageEnglish (US)
Pages (from-to)824-832
Number of pages9
JournalAstrophysical Journal
Volume583
Issue number2 I
DOIs
StatePublished - Feb 1 2003

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All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Atkins, R., Benbow, W., Berley, D., 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., Gonzalez, M. M., Goodman, J. A., Haines, T. J., Hoffman, C. M., Hugenberger, S., Kelley, L. A., ... Yodh, G. B. (2003). The high-energy gamma-ray fluence and energy spectrum of GRB 970417a from observations with Milagrito. Astrophysical Journal, 583(2 I), 824-832. https://doi.org/10.1086/345499