Bochum 1998 – scientific programme

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HK: Hadronen und Kerne

HK 53: Nuclear Astrophysics IV

HK 53.8: Talk

Wednesday, March 18, 1998, 16:00–16:15, G

Measurements of Gamma-Ray Lines from Supernovae — •Lichti Giselher — Max-Planck-Institut fuer extraterrestrische Physik, Giessenbachstrasse, 85748 Garching

Since the launch of the Compton Gamma-Ray Observatory in 1991 only two supernovae exploded close enough and were detected early enough to make a search for gamma-ray line emission with the low-energetic Compton telescope COMPTEL promising, namely SN 1991T and SN 1993J. Both supernovae have been observed with COMPTEL, one of the four gamma instruments on board of CGRO. In the case of SN 1991T the 56Co gamma-ray lines at 846.8 keV and 1.2383 MeV were marginally detected (Morris et al., 1995), whereas for SN 1993J only upper limits could be given (Lichti et al., 1996). The results of these two observations are reviewed and compared with theoretical models. The prospects for observing supernovae with the next gamma-ray telescope, the gamma-ray spectrometer SPI on board of ESA’s INTEGRAL satellite, will be discussed.

Literature: ==========

Morris, D. et al.: Annals of New York Acad. of Sci. 759, 397-400, 1995 Lichti, G. G. et al.: A&A Suppl. Ser. 120, 353, 1996