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The nature of the prompt X-ray and radio emission from SN 2002ap

Sutaria, FK and Chandra, P and Bhatnagar, S and Ray, A (2003) The nature of the prompt X-ray and radio emission from SN 2002ap. In: Astronomy & Astrophysics, 397 (3). pp. 1011-1018.

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We report on the combined X-ray and radio observations of the type Ic SN 2002ap, using XMM-Newton TOO observation of M 74 and the Giant Metrewave Radio Telescope ( GMRT). We account for the presence of a nearby source in the pre-supernova Chandra field of view in our measurements of the X-ray flux (0.3-10 KeV) 5.2 days after the explosion. The X-ray spectrum is well fitted by a power law spectrum with photon index alpha = 2.6. Our results suggest that the prompt X-ray emission originates from inverse Compton scattering of photospheric thermal emission by energetic electrons. Radio observations with the GMRT at 610 MHz (8 days after the explosion) and 1420 MHz (70 days after the explosion) are combined with the high frequency VLA observations of SN 2002ap reported by Berger et al. ( 2002), and the early radiospheric properties of SN 2002ap are compared with similar data from two other supernovae. Finally, the GMRT radio map reveals four other X-ray sources in the field of view of M 74 with radio counterparts.

Item Type: Journal Article
Publication: Astronomy & Astrophysics
Publisher: EDP Sciences
Additional Information: Copyright of this article belongs to EDP Sciences.
Keywords: supernovae;individual;SN 2002ap -- supernovae: general -- radiation mechanisms;non-thermal -- circumstellar matter
Department/Centre: Division of Physical & Mathematical Sciences > Joint Astronomy Programme
Date Deposited: 25 Aug 2011 04:41
Last Modified: 25 Aug 2011 04:41
URI: http://eprints.iisc.ac.in/id/eprint/40274

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