Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...395..637s&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 395, no. 2, Aug. 20, 1992, p. 637-641. Research supported by NASA, SERC, CN
Astronomy and Astrophysics
Astronomy
1
Balloon-Borne Instruments, Gamma Ray Astronomy, Particle Acceleration, Supernova 1987A, Balloon Flight, Compton Effect, Spark Chambers, Supernovae
Scientific paper
Analysis of the data obtained from two flights of a balloonborne gamma-ray detector to observe SN 1987A was completed. The detector, which included a spark chamber to determine the arrival directions of the photons, was sensitive in the energy range 50-500 MeV. The 95 percent confidence upper limit to the flux on day 55 after the explosion has been established to be 1.1 x 10 exp -5 photons/sq cm/s and on day 407 to be 3.4 x 10 exp -5 photons/sq cm/s. These limits are compared with various theoretical predictions.
Bazzano Angela
Frye G.
Jenkins Teresa
Kendziorra Eckhard
Rochester G. K.
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