On the nature of the nonthermal emission from the supernova remnant IC 443

Details On the nature of the nonthermal emission from the supernova remnant IC 443 On the nature of the nonthermal emission from the supernova remnant IC 443

Oct 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..587..528s&link_type=abstract

GAMMA 2001: Gamma-Ray Astrophysics 2001. AIP Conference Proceedings, Volume 587, pp. 528-532 (2001).

Astronomy and Astrophysics

Astrophysics

Supernova Remnants, X-Ray, Molecular Clouds, H2 Clouds, Dense Clouds, And Dark Clouds

Scientific paper

The supernova remnant (SNR) IC 443 is a nearby (~1.5 kpc) remnant of intermediate age which appears to be interacting with a molecular cloud and is spatially coincident with the unidentified EGRET source 3EG J0617+2238. We present new spectra of IC 443 obtained using the PCA on RXTE. The spectrum is well fit by a two-component model consisting of a non-equilibrium ionization collisional plasma model with kT ~0.6 keV plus a power-law with index ~2.2. We compare our results with the earlier results of HEAO 1 A-2, Ginga, ASCA, and BeppoSAX, and find generally good agreement. We also discuss the possible association of 3EG J0617+2238 with IC 443 given that recent Chandra results indicate that much of its nonthermal X-ray emission originates from a pulsar wind nebula. We find that unless the calculation of the position of 3EG J0617+2238 is affected by nearby strong sources such as Geminga, the Chandra source is excluded from being associated with the EGRET source. .

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