XMM-Newton and Swift observations of the Type IIb SN 2011dh in Messier 51

Abstract

The Type IIb SN 2011dh exploded in the nearby galaxy M51 (the Whirlpool Galaxy) and provides us with one of the best laboratory 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 of the full Swift X-ray Telescope (XRT) dataset (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.

MNRAS in press (5 pages, 3 figures)

References in corpus (2)

• The Type IIb Supernova 2011dh from a Supergiant Progenitor
• Interstellar Sodium and Calcium Absorption toward SN 2011dh in M51

Cited by in corpus (8)

• Optical and near-infrared observations of SN 2011dh - The first 100 days
• The Progenitor of Supernova 2011dh Has Vanished
• One year of monitoring of the Type IIb supernova SN 2011dh
• Long-Lasting X-Ray Emission from Type IIb Supernova 2011dh and Mass-Loss History of The Yellow Supergiant Progenitor
• Nebular spectroscopy of the nearby type IIb supernova 2011dh
• Evolution of the progenitors of SNe 1993J and 2011dh revealed through late time radio and X-ray studies
• Low frequency radio observations of SN 2011dh and the evolution of its post-shock plasma properties
• Analysis of 14 Years of X-Ray Emission From SN 2011DH