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   PR # 41088
   Because of its proximity, SN1987A is providing us with a unique
   opportunity to study an SNR in their very early phase of evolution.
   ROSAT detected soft X-rays from the SN in 1991-1992 observations,
   whose origin is probably the shock formed by the colliding ejecta and
   the wind remnant of the progenitor. In 1995 April, ASCA also detected
   the X-ray emission with flux of about 1E-13 erg/cm2/sec. Given the
   distribution of the circumstellar matter around the SN, increase of
   the X-ray luminosity is expected as the ejecta expands. Time
   evolution of the luminosity and spectrum will give valuable
   information on the circumstellar matter and the mass loss history of
   the progenitor.
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