CGRO/OSSE observations of the Cassiopeia A Supernova remnant

Details CGRO/OSSE observations of the Cassiopeia A Supernova remnant CGRO/OSSE observations of the Cassiopeia A Supernova remnant

May 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...444..244t&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 444, no. 1, p. 244-250

Astronomy and Astrophysics

Astronomy

14

Emission Spectra, Gamma Ray Astronomy, Gamma Ray Spectra, Milky Way Galaxy, Stellar Spectra, Supernova Remnants, Abundance, Carbon, Gamma Ray Observatory, Nuclear Fusion, Particle Interactions, Titanium

Scientific paper

Cassipeia A, the youngest known supernova remnant in the Galaxy and a strong radio and X-ray source, was observed by OSSE 1992 July 16-August 6. Its close distance (approximately 3 kpc) and its young age (approximately 300 yr) make Cas A the best candidate among known supernova remnants for detecting Ti-44 gamma-ray lines. We find no evidence of emission at 67.9 keV, 78.4 keV, or 1.157 MeV, the three strongest Ti-44 decay lines. From simultaneous fits to the three lines our 99% confidence upper limit to the flux in each line is 5.5 x 10-5 gamma/sq cm s. We also report upper limits for the 4.44 MeV C-12 nuclear de-excitation line, which could be produced by interactions of acclerated particles in the supernova remnant, and for the hard X-ray continuum.

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