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XMM–Newton and Swift observations of the Type IIb supernova 2011dh in Messier 51
Article first published online: 3 OCT 2012
DOI: 10.1111/j.1745-3933.2012.01347.x
© 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS
Issue
Monthly Notices of the Royal Astronomical Society: Letters
Volume 427, Issue 1, pages L70–L74, November 2012
Additional Information
How to Cite
Campana, S. and Immler, S. (2012), XMM–Newton and Swift observations of the Type IIb supernova 2011dh in Messier 51. Monthly Notices of the Royal Astronomical Society: Letters, 427: L70–L74. doi: 10.1111/j.1745-3933.2012.01347.x
Publication History
- Issue published online: 7 NOV 2012
- Article first published online: 3 OCT 2012
- Accepted 2012 September 3. Received 2012 August 3; in original form 2012 March 9
- Abstract
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- References
- Cited By
Keywords:
- supernovae: individual: SN 2011dh;
- galaxies: ISM;
- X-rays: individual: SN 2011dh
ABSTRACT
The Type IIb supernova (SN) 2011dh exploded in the nearby galaxy M51 (the Whirlpool galaxy) and provides us with one of the best laboratories to study early high-energy emission from SNe. We give here a comprehensive view of the X-ray properties of SN 2011dh from the analyses of two pointed XMM–Newton early observations as well as the full Swift X-ray Telescope (XRT) data set (163 ks). Due to the high XMM–Newton throughput, we were able to satisfactorily fit the X-ray spectrum with two hot diffuse gas components including an additional absorption component to our Galaxy. A power-law model provided a worse description of the data. In addition, the early Swift XRT light curve hints of a flux excess at early times (≲3 d), consistent with the adiabatic cooling of stellar’s photosphere a few days after the shock breakout.