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SN2007bg : GMRT Radio observations

ATEL # 2133; Atish Kamble (U of Amsterdam), Sabyasachi Pal (U of Western Australia), Dipankar Bhattacharya (IUCAA), Ralph Wijers (U of Amsterdam) and Ishwara Chandra (NCRA) report on behalf of a larger collaboration
on 16 Jul 2009; 23:20 UT
Password Certification: Atish Kamble (a.p.kamble@uva.nl)

Subjects: Radio, Gamma-Ray Bursts, Nova, Supernova, Transients

The GMRT observed SN2007bg (Quimby et al. 2007, CBET #927; Prieto et al. GCN #9444; Soderberg A. M., ATel #2066) on 26th June and 1st July 2009 at 610 and 1280 MHz, respectively. The SN was not detected at 610 MHz to a three sigma upper limit of 225 microJy. The measured brightness of SN2007bg are as follows :

   date              Freq. (MHz)  days since discovery  Flux (mJy)   26 Jun 2009         610             ~ 802            < 0.225 (3 sigma)   01 July 2009       1280             ~ 806            1.2 +/- 0.14         The 'days since discovery' are estimated following Prieto et al. (GCN #9444). These results are indicative that the source is optically thick at 610 MHz.      This message may be cited. 


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R. E. Rutledge , Editor
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