AAS 205th Meeting, 9-13 January 2005
Session 70 Supernovae and Supernovae Remnants
Poster, Tuesday, January 11, 2005, 9:20am-6:30pm, Exhibit Hall

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[70.03] Chandra observation of the Lobe of the SNR CTB 109

M. Sasaki (Harvard-Smithsonian CfA), R. Kothes (Dominion Radio Astrophysical Observatory), R.A. Fesen, D.J. Patnaude (Dartmouth College), P.P. Plucinsky, T.J. Gaetz, R.J. Edgar (Harvard-Smithsonian CfA), R.K. Smith, P.O. Slane (NASA/GSFC & JHU)

We observed the unusually bright diffuse feature interior to the Galactic supernova remnant CTB 109 (G109.1--1.0) with Chandra ACIS-I. This feature, known as the 'Lobe', has previously been suggested as emission associated with the anomalous X-ray pulsar 1E 2259+586. We find that a more likely explanation is that the feature is enhanced emission from the interaction of the remnant with a nearby molecular cloud complex. The deep ACIS-I image (exposure of 80 ksec) reveals filamentary structures in the Lobe and a large number of point sources that were not resolved in previous observations. Spatially resolved spectral analysis of the diffuse emission indicates variations in foreground absorption, plasma temperature, and ionization timescale in and around the Lobe.

This work was supported by the NASA grant G02-3092A and NASA contract NAS8-03060.

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© 2004. The American Astronomical Society.