Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-03-31
Astrophys.J. 624 (2005) L41-L44
Astronomy and Astrophysics
Astrophysics
Accepted for publication in The Astrophysical Journal Letters High resolution Images of Fig.1 are appended
Scientific paper
10.1086/430499
A Chandra observation of the isolated hard X-ray source XMMU J061804.3+222732, located in the region of apparent interaction of the supernova remnant IC 443 with a molecular cloud, resolved the complex structure of the source in a few bright clumps embedded in an extended emission of a ~ 30 arcsec size. The X-ray spectra of the clumps and the extended emission are dominated by a hard power-law component with a photon index of 1.2--1.4. In addition, we see some indications of an optically thin thermal plasma of a ~ 0.3 keV temperature. The observed X-ray morphology and spectra are consistent with those expected for an isolated supernova ejecta fragment interacting with a dense ambient medium. A possible alternative interpretation is a pulsar wind nebula associated with either IC 443 or another SNR, G189.6+3.3.
Bocchino Fabrizio.
Bykov Andrei M.
Pavlov George G.
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