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Issue A&A
Volume 406, Number 3, August II 2003
Page(s) 969 - 974
Section Stellar atmospheres
DOI http://dx.doi.org/10.1051/0004-6361:20030687



A&A 406, 969-974 (2003)
DOI: 10.1051/0004-6361:20030687

XMM-Newton observation of SN 1993J in M 81

H.-U. Zimmermann and B. Aschenbach

Max-Planck-Institut für Extraterrestrische Physik, Postfach 1312, 85471 Garching, Germany
(Received 3 March 2003 / Accepted 18 April 2003)

Abstract
In April 2001 SN 1993J was observed with both the PN and MOS cameras of the XMM-Newton observatory, resulting in about $7\times 10^4~$s of acceptable observation time. Fit results with both the PN and MOS2 camera spectra studying different spectral models are presented. The spectra are best fitted in the energy range between 0.3 and ~10 keV by a 2-component thermal model with temperatures of $kT_1 = 0.34\pm 0.04$ keV and $kT_2 = 6.54\pm 4$ keV, adopting ionization equilibrium. A fit with a shock model also provides acceptable results. Combining the XMM-Newton data with former X-ray observations of the supernova, we discuss the general trend of $L_{\rm x}\propto t^{-0.30}$ and the bump of the X-ray light curve as well as former and recent spectral results in the light of the standard SN model as first proposed by Chevalier in 1982.


Key words: X-rays: stars -- stars: supernovae: individual: SN 1993J

Offprint request: H.-U. Zimmermann, zim@mpe.mpg.de

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