Radio Non-Detection of the Type IIP Supernova 2012A in NGC 3239
ATel #3861; C. J. Stockdale (Marquette), S. D. Ryder (AAO), S. D. Van Dyk (Spitzer), F. E. Bauer (Pontificia Universidad Catolica), J. M. Marcaide (Valencia), S. Immler (NASA/GSFC), D. Pooley (Texas), C. L. M. Williams (MIT), K. W. Weiler (NRL), A. Horesh (Cal Tech)
on 12 Jan 2012; 17:10 UT
Credential Certification: Christopher J. Stockdale (email@example.com)
Subjects: Radio, Supernovae
The Type IIP Supernova 2012A (CBET #2974,2975) in the galaxy NGC 3239 has been observed with the Karl G. Jansky Very Large Array on 2012 Jan 9.4 at frequencies of 29 and 37 GHz. No radio emission was detected at the supernova location, with 3-sigma upper limits of 0.18 mJy at 29 GHz, and 0.26 mJy at 37 GHz, with a combined limit of 0.15 mJy centered at 33GHz. Adopting a host galaxy distance of 8.1 Mpc from NED, this implies an upper limit on the luminosity at 33 GHz of 1.1E25 erg/s/Hz.
An independent analysis of our VLA data by L. Chomiuk and A. M. Soderberg (CfA) also yielded a non-detection.
We would like to extend our thanks to the VLA staff for enabling these observations, especially M. P. Rupen and D. Frail. We also thank J. C. Wheeler and the University of Texas for their invaluable assistance in providing access to computational facilities to analyze the data. The National Radio Astronomy Observatory is facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc.