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Title:
Detection of X-rays from SN 1987A with ROSAT
Authors:
Gorenstein, Paul; Hughes, John P.; Tucker, Wallace H.
Affiliation:
AA(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, US), AB(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, US), AC(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, US)
Publication:
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 420, no. 1, p. L25-L28 (ApJ Homepage)
Publication Date:
01/1994
Category:
Astronomy
Origin:
STI
NASA/STI Keywords:
ASTRONOMICAL MODELS, B STARS, EJECTA, MAGELLANIC CLOUDS, STELLAR WINDS, SUPERNOVAE, X RAY ASTRONOMY, X RAY BINARIES, GINGA SATELLITE, LUMINOSITY, MIR SPACE STATION, PROPORTIONAL COUNTERS, ROSAT MISSION, STELLAR COLOR
DOI:
10.1086/187154
Bibliographic Code:
1994ApJ...420L..25G

Abstract

Soft X-rays (0.5-2 keV) were detected with the ROSAT Position-Sensitive Proportional Counter (PSPC) from the direction of SN 1987A, which falls within an association in the Large Magellanic Cloud (LMC) that is rich in B stars. The emission is consistent with two point sources in the LMC with total luminosity of approximately 1034 ergs/s. The brighter source is identified with SN 1987A on the basis of its positional agreement. We interpret the emission as arising from the interaction of supernova ejecta with the pre-existing blue giant wind. The second source may be an unidentified Be/X-ray binary. Another possibility is that the second source is an X-ray echo from the supernova outburst. The X-ray echo interpretation requires that the supernova emitted approximately 1047 ergs in a burst of soft X-rays.

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