50--500 MeV. gamma. -ray emission in the early phase of SN1987A

Conference · Sun Sep 25 04:00:00 EDT 1988 · AIP Conf. Proc.; (United States)

OSTI ID:6833907

Sood, R K; Thomas, J A; Waldron, L; Manchanda, R K; Ubertini, P; Bazzano, A; La Padula, C D; Rochester, G K; Sumner, T J; Frye, G; others, and

SN1987A was observed on 19th April 1987 with a combined high energy ..gamma..-ray and hard x-ray payload, flown on a stratospheric balloon from Alice Springs, Australia. The ..gamma..-ray detector, sensitive in the energy range 50--500 MeV, was an optical spark chamber with 400cm/sup 2/ area, a field of view of 60/sup 0/ FWHM and a time resolution of 10 ..mu..s. The counting rate profile at approx.2.2 mb float altitude has lead to a 3sigma upper limit to the steady ..gamma..-ray flux of 7 x 10/sup -4/ ph cm/sup -2/ s/sup -1/ in the 50--500 MeV range. This upper limit is compared to our predictions for the time profile of ..gamma..-ray emission from SN1987A resulting from pulsar acceleration of particles to cosmic ray energies.

• Research Organization: University College, ADFA, Univ. of NSW, Canberra, Australia
• OSTI ID: 6833907
• Report Number(s): CONF-871245-
• Conference Information: Journal Name: AIP Conf. Proc.; (United States) Journal Volume: 170:1
• Country of Publication: United States
• Language: English

Related Subjects

640101 -- Astrophysics & Cosmology-- Cosmic Radiation
640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AIRSHIPS
BALLOONS
COSMIC RAY SOURCES
ENERGY RANGE
ERUPTIVE VARIABLE STARS
GALAXIES
GAMMA SPECTRA
GAS TRACK DETECTORS
MAGELLANIC CLOUDS
MEASURING INSTRUMENTS
MEV RANGE
MEV RANGE 10-100
MEV RANGE 100-1000
NUCLEOSYNTHESIS
RADIATION DETECTORS
SPARK CHAMBERS
SPECTRA
STARS
SUPERNOVAE
SYNTHESIS
VARIABLE STARS