Detection of X-rays from SN 1993J with ASCA

Details Detection of X-rays from SN 1993J with ASCA Detection of X-rays from SN 1993J with ASCA

Aug 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994pasj...46l.157k&link_type=abstract

PASJ: Publications of the Astronomical Society of Japan (ISSN 0004-6264), vol. 46, no. 4, p. L157-L161

Astronomy and Astrophysics

Astronomy

27

Ejecta, Iron, Shock Spectra, Stellar Winds, Supernovae, X Ray Astronomy, X Ray Spectra, Charge Coupled Devices, Imaging Spectrometers, Rosat Mission, Satellite-Borne Instruments, X Ray Telescopes

Scientific paper

ASCA observed SN 1993J seven times between April 5 and October 24 in 1993. The 1-10 keV luminosity 10d after the explosion was (15 +/- 4) x 1039 erg/s and decreased monotonicly to (1.3 +/- 0.4) x 1039 erg/s 210 d after the explosion, when a distance of 3.6 Mpc was assumed. The hardness ratio (2-10 keV/0.5-2 keV) significantly decreased during the course of the observations. The spectrum obtained from a sky region including not only SN 1993J but also the nearby X-ray source clearly shows an iron emission line. The correlation between the iron line flux with the SN 1993J flux suggests that the iron line emission originated in SN 1993J. These observational results are discussed in the context of thermal X-ray emission from a hot region behind the shock due to the collision of the supernova ejecta with the pre-supernova stellar wind.

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