OSSE Observations of Supernovae 1987a

Details OSSE Observations of Supernovae 1987a OSSE Observations of Supernovae 1987a

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...180.1306k&link_type=abstract

American Astronomical Society, 180th AAS Meeting, #13.06; Bulletin of the American Astronomical Society, Vol. 24, p.750

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The Oriented Scintillation Spectrometer Experiment (OSSE) on the COMPTON Gamma Ray Observatory observed SN 1987a from 1991 July 25 through August 8 (1617 to 1628 days after the explosion) and from 1991 Dec 10 to 1992 Jan 10 (1767 to 1781 days after the explosion). At these times (57) Co radioactivity is expected to be a significant source of power into the supernova remnant. Suntzeff et al. (1992) and Dwek et al. (1992), based on the bolometric luminosity, suggest that the production ratio of (57) Ni/(56) Ni is about 5 times solar. The OSSE data indicate a lower production of (57) Ni and are inconsistent with the value of 5 times solar at greater than the 3sigma level. Therefore another source of power is required for the observed luminosity at these times. OSSE results on the gamma-ray observations of (57) Co emission will be presented. Dwek et al., submitted to Ap.J. (Letters) Suntzeff et al., Ap.J. (Letters) 384, L33

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