SN1987A: Emergence of the soft X-ray source

Details SN1987A: Emergence of the soft X-ray source SN1987A: Emergence of the soft X-ray source

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...281l..45b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 281, no. 1, p. L45-L48

Astronomy and Astrophysics

Astrophysics

36

Shock Wave Interaction, Stellar Envelopes, Stellar Winds, Supernova 1987A, X Rays, Magellanic Clouds, Neutron Stars, Radio Emission, Rosat Mission, Stellar Luminosity

Scientific paper

We report the first soft X-ray detection of SN1987A. The source was found at 2.7 10-3 cts/s (0.5 - 2.0 keV) in a deep 1992 exposure with the ROSAT Position Sensitive Proportional Counter (PSPC), it was marginally present also in a shorter 1991 exposure. The luminosity in the 0.5-2.0 keV band is L approximately equal to 1034 erg/s. The X-ray emission may originate from the central object or from the shock-heated ejecta and circumstellar material. We favor an origin from the interaction of the supernova blast wave with the termination shock of the fast wind from the progenitor star. This interpretation connects the emergence of the soft X-rays with the re-appearance of radio emission from SN1987A in mid 1990.

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