Evidence for TeV emission from GRB 970417a

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, J. A. Goodman, T. J. Haines, C. M. Hoffman, S. Hugenberger, L. A. Kelley, I. Leonor, M. Mcconnell & 19 others J. F. Mccullough, J. E. Mcenery, R. S. Miller, A. I. Mincer, M. F. Morales, P. Nemethy, J. M. Ryan, 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

    Research output: Contribution to journalArticle

    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 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 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.

    Original languageEnglish (US)
    JournalAstrophysical Journal
    Volume533
    Issue number2 PART 2
    StatePublished - Apr 20 2000

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    field of view
    gamma ray bursts
    bursts
    northern sky
    energy
    gamma rays
    cycles
    detectors
    detector

    Keywords

    • Gamma rays: bursts
    • Gamma rays: observations

    ASJC Scopus subject areas

    • Space and Planetary Science

    Cite this

    Atkins, R., Benbow, W., Berley, D., Chen, M. L., Coyne, D. G., Dingus, B. L., ... Yodh, G. B. (2000). Evidence for TeV emission from GRB 970417a. Astrophysical Journal, 533(2 PART 2).

    Evidence for TeV emission from GRB 970417a. / 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.; Goodman, J. A.; Haines, T. J.; Hoffman, C. M.; Hugenberger, S.; Kelley, L. A.; Leonor, I.; Mcconnell, M.; Mccullough, J. F.; Mcenery, J. E.; Miller, R. S.; Mincer, A. I.; Morales, M. F.; Nemethy, P.; Ryan, J. M.; Shen, B.; Shoup, A.; Sinnis, C.; Smith, A. J.; Sullivan, G. W.; Tumer, T.; Wang, K.; Wascko, M. O.; Westerhoff, S.; Williams, D. A.; Yang, T.; Yodh, G. B.

    In: Astrophysical Journal, Vol. 533, No. 2 PART 2, 20.04.2000.

    Research output: Contribution to journalArticle

    Atkins, R, Benbow, W, Berley, D, Chen, ML, Coyne, DG, Dingus, BL, Dorfan, DE, Ellsworth, RW, Evans, D, Falcone, A, Fleysher, L, Fleysher, R, Gisler, G, Goodman, JA, Haines, TJ, Hoffman, CM, Hugenberger, S, Kelley, LA, Leonor, I, Mcconnell, M, Mccullough, JF, Mcenery, JE, Miller, RS, Mincer, AI, Morales, MF, Nemethy, P, Ryan, JM, Shen, B, Shoup, A, Sinnis, C, Smith, AJ, Sullivan, GW, Tumer, T, Wang, K, Wascko, MO, Westerhoff, S, Williams, DA, Yang, T & Yodh, GB 2000, 'Evidence for TeV emission from GRB 970417a', Astrophysical Journal, vol. 533, no. 2 PART 2.
    Atkins R, Benbow W, Berley D, Chen ML, Coyne DG, Dingus BL et al. Evidence for TeV emission from GRB 970417a. Astrophysical Journal. 2000 Apr 20;533(2 PART 2).
    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. ; Goodman, J. A. ; Haines, T. J. ; Hoffman, C. M. ; Hugenberger, S. ; Kelley, L. A. ; Leonor, I. ; Mcconnell, M. ; Mccullough, J. F. ; Mcenery, J. E. ; Miller, R. S. ; Mincer, A. I. ; Morales, M. F. ; Nemethy, P. ; Ryan, J. M. ; Shen, B. ; Shoup, A. ; Sinnis, C. ; Smith, A. J. ; Sullivan, G. W. ; Tumer, T. ; Wang, K. ; Wascko, M. O. ; Westerhoff, S. ; Williams, D. A. ; Yang, T. ; Yodh, G. B. / Evidence for TeV emission from GRB 970417a. In: Astrophysical Journal. 2000 ; Vol. 533, No. 2 PART 2.
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    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 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 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.",
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    AU - Atkins, R.

    AU - Benbow, W.

    AU - Berley, D.

    AU - Chen, M. L.

    AU - Coyne, D. G.

    AU - Dingus, B. L.

    AU - Dorfan, D. E.

    AU - Ellsworth, R. W.

    AU - Evans, D.

    AU - Falcone, A.

    AU - Fleysher, L.

    AU - Fleysher, R.

    AU - Gisler, G.

    AU - Goodman, J. A.

    AU - Haines, T. J.

    AU - Hoffman, C. M.

    AU - Hugenberger, S.

    AU - Kelley, L. A.

    AU - Leonor, I.

    AU - Mcconnell, M.

    AU - Mccullough, J. F.

    AU - Mcenery, J. E.

    AU - Miller, R. S.

    AU - Mincer, A. I.

    AU - Morales, M. F.

    AU - Nemethy, P.

    AU - Ryan, J. M.

    AU - Shen, B.

    AU - Shoup, A.

    AU - Sinnis, C.

    AU - Smith, A. J.

    AU - Sullivan, G. W.

    AU - Tumer, T.

    AU - Wang, K.

    AU - Wascko, M. O.

    AU - Westerhoff, S.

    AU - Williams, D. A.

    AU - Yang, T.

    AU - Yodh, G. B.

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    AB - 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 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 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.

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    KW - Gamma rays: observations

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