Gamma-ray Observations of Cas A SNR
L.-S. The, M. D. Leising, D. H. Hartmann, D. Clayton
J. D. Kurfess
R. Lingenfelter, R. Rothschild
S. E. Woosley
Gamma-ray observations of Cas A SNR have been stimulated by recent
COMPTEL detection of the 1.157 MeV gamma-line flux of 44Ti decays
and by the hard X-ray power-law continuum measurements.
Measuring the 44Ti mass provides the unique opportunity to constrain
the synthesis and ejection of a specific isotope from the innermost
part of a single supernova.
The hard X-ray power-law continuum is interpreted
as the synchrotron radiation from accelerated electrons with
energies of ~ 100 TeV near the shock fronts.
The correlation of the hard X-ray spectra with Cas A's radio spectra
provides strong evidence for supernovae as sites of charged
particle acceleration and sources of cosmic rays.
We present the results of nine viewing periods of OSSE/CGRO Cas A SNR
we summarize and compare various measurements of Cas A's 44Ti line flux
and hard X-ray continuum measurements of various instruments.
File translated from TEX by TTH, version 2.32.
On 16 Jul 1999, 09:19.