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Archival Chandra observations of the new radio transient in M82

ATEL # 2080; A.K.H. Kong, Y.-K. Chiang (NTHU, Taiwan)
on 12 Jun 2009; 15:05 UT
Password Certification: Albert Kong (akong@cfa.harvard.edu)

Subjects: Radio, X-ray, Nova, Supernova, Transients

We report archival Chandra observations of the new radio transient in M82 discovered by Muxlow et al. (ATel #2073). In their discovery, they claimed that there is a weak Chandra X-ray source within 0.5 arcsec of the radio transient and hence it may be associated with the radio transient. We re-examined an astrometry corrected (by matching with the 2MASS catalog) Chandra image (Kong et al. 2007, ApJ, 671, 349) and found that the X-ray source is > 1 arcsec from the radio position. We therefore suggest that the Chandra source is not the counterpart of the radio transient. Instead, the X-ray source is associated with a radio supernova remnant (source 34) reported in Fenech et al. (2008, MNRAS, 391, 1384).


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