Hard X-Radiation from Supernova 1987A - Roentgen Observatory Observations from 1987 TO 1989

Details Hard X-Radiation from Supernova 1987A - Roentgen Observatory Observations from 1987 TO 1989 Hard X-Radiation from Supernova 1987A - Roentgen Observatory Observations from 1987 TO 1989

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990sval...16..171s&link_type=abstract

Soviet Astronomy Letters, Vol.16, NO. 3/MAY, P. 171-176, 1990

Astronomy and Astrophysics

Astronomy

16

Scientific paper

Two years of observations of the hard X-ray radiation from SN1987A with the HEXE instrument of the Roentgen observatory on the Kvant module are summarized. By May-June 1989 the hard radiation flux from SN1987A had decreased by more than eight times in comparison with the flux at the X-ray brightness curve maximum. An upper limit for the Co-57/Co-56 abundance ratio has been found at the three standard deviation level. It is 1.5 times greater than the Fe-57/Fe-56 abundance ratio on the Earth.

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