Since the discovery of the supernova outburst in the LMC in 1987, two attempts (on day 55 and day 407) have been made to measure the high energy gamma-ray flux in the range 50-500 MeV, by using a balloon-borne spark chamber telescope. On day 55, no positive signal was seen from the source. A 3 sigma upper limit of 2.9 x 10 to the -5th ph/sq cm s was obtained after the analysis of the spark chamber data. Preliminary analysis of the quick look data obtained in the second flight shows that the gamma-ray flux even on day 407 was less than 9 x 10 to the -4th ph/sq cm s (3 sigma).


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    Title :

    50-500 MeV observations of LMC supernova 1987A


    Contributors:
    Sumner, T. J. (author) / Rochester, G. K. (author) / Sood, R. K. (author) / Thomas, J. (author) / Waldron, L. (author)

    Published in:

    Publication date :

    1990-01-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English




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