DETECTION OF X-RAYS FROM SN 1993J WITH ASCA

Authors
KOHMURA Y INOUE H AOKI T ISHIDA M ITOH M KOTANI T TANAKA Y ISHISAKI Y MAKISHIMA K MATSUSHITA K GOTTHELF E RICKER G TSUSAKA Y
Citation
Y. Kohmura et al., DETECTION OF X-RAYS FROM SN 1993J WITH ASCA, Publications of the Astronomical Society of Japan, 46(4), 1994, pp. 120000157-120000161
Citations number
33
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Publications of the Astronomical Society of Japan → ACNP
ISSN journal
00046264
Volume
46
Issue
4
Year of publication
1994
Pages
120000157 - 120000161
Database
ISI
SICI code
0004-6264(1994)46:4<120000157:DOXFS1>2.0.ZU;2-C
Abstract
ASCA observed SN 1993J seven times between April 5 and October 24 in 1 993. The 1-10 keV luminosity 10 d after the explosion was (15+/-4)x10( 39) erg s(-1) and decreased monotonicly to (1.3+/-0.4)x10(39) erg s(-1 ) 210 d after the explosion, when a distance of 3.6 Mpc was assumed. T he hardness ratio (2-10 keV/0.5-2 keV) significantly decreased during the course of the observations. The spectrum obtained from a sky regio n including not only SN 1993J but also the nearby X-ray source clearly shows an iron emission line. The correlation between the iron line fl ux with the SN 1993J flux suggests that the iron line emission origina ted in SN 1993J These observational results are discussed in the conte xt 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.