The X-ray spectrum and light curve of Supernova 1995N

December 2000 • 2000MNRAS.319.1154F

Authors • Fox, D. W. • Lewin, W. H. G. • Fabian, A. • Iwasawa, K. • Terlevich, R. • Zimmermann, H. U. • Aschenbach, B. • Weiler, K. • Van Dyk, S. • Chevalier, R. • Rutledge, R. • Inoue, H. • Uno, S.

Abstract • We report on multi-epoch X-ray observations of the Type IIn (narrow emission line) Supernova (SN) 1995N with the ROSAT and ASCA satellites. The 1998 January ASCA X-ray spectrum is well fitted by a thermal bremsstrahlung (kT~10keV, N_H~6×10²⁰cm^-2) or power-law (α~1.7, N_H~10²¹cm^-2) model. The X-ray light curve shows evidence for significant flux evolution between 1996 August and 1998 January: the count rate from the source decreased by 30per cent between our 1996 August and 1997 August ROSAT observations, and the X-ray luminosity most likely increased by a factor of ~2 between our 1997 August ROSAT and 1998 January ASCA observations, although evolution of the spectral shape over this interval is not ruled out. The high X-ray luminosity, L_X~10⁴¹ergs^-1, places SN 1995N in a small group of Type IIn supernovae with strong circumstellar interaction, and the evolving X-ray luminosity suggests that the circumstellar medium is distributed inhomogeneously.

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• PREPRINT http://arxiv.org/abs/astro-ph/0008410
• NED https://ned.ipac.caltech.edu/uri/NED::InRefcode/2000MNRAS.319.1154F
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• ELECTR http://dx.doi.org/10.1046/j.1365-8711.2000.03941.x
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• ARTICLE http://articles.adsabs.harvard.edu/full/2000MNRAS.319.1154F?defaultprint=YES
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