The X‐ray spectrum and light curve of Supernova 1995N
Identifieur interne : 000519 ( Main/Exploration ); précédent : 000518; suivant : 000520The X‐ray spectrum and light curve of Supernova 1995N
Auteurs : D. W. Fox [États-Unis] ; W. H. G. Lewin [États-Unis] ; A. Fabian ; K. Iwasawa ; R. Terlevich ; H. U. Zimmermann [Allemagne] ; B. Aschenbach [Allemagne] ; K. Weiler [États-Unis] ; S. Van Dyk [États-Unis] ; R. Chevalier [États-Unis] ; R. Rutledge [États-Unis] ; H. Inoue [Japon] ; S. Uno [Japon]Source :
- Monthly Notices of the Royal Astronomical Society [ 0035-8711 ] ; 2000-12.
English descriptors
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 or power‐law 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 30 per 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, 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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DOI: 10.1046/j.1365-8711.2000.03941.x
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The 1998 January ASCA X‐ray spectrum is well fitted by a thermal bremsstrahlung or power‐law 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 30 per 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, 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.</div></front></TEI><affiliations><list><country><li>Allemagne</li><li>Japon</li><li>États-Unis</li></country></list><tree><noCountry><name sortKey="Fabian, A" sort="Fabian, A" uniqKey="Fabian A" first="A." last="Fabian">A. 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