Hard X-Radiation from Supernova 1987A - Roentgen Observatory Observations from 1987 TO 1989
Abstract
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.
- Publication:
-
Soviet Astronomy Letters
- Pub Date:
- May 1990
- Bibcode:
- 1990SvAL...16..171S