Nova Centauri 2013 brightens to 160 mJy at 35 GHz
ATel #6058; K. W. Bannister (CASS), L. Chomiuk (Michigan State), M. Rupen (NRAO), J. Sokoloski (U. Columbia)
on 9 Apr 2014; 23:13 UT
Credential Certification: Keith Bannister (keith.bannister@csiro.au)
Referred to by ATel #: 15310
We observed observed Nova Centauri 2013 (IAUC # 9265 , ATel #5649, ATel #5685) with the Australia Telescope Compact Array (ATCA) for 5 hrs on 2014-04-1.4 with the H168 array (a very compact, hybrid configuration). It was observed with 2x2 GHz bands centered at 5.5, 9, 33 and 35 GHz.
Fitting a beam to the deconvolved map yields the following detections in all bands:
5 GHz: 6.5 ± 0.2 mJy
9 GHz: 16.7 ± 0.2 mJy
33 GHz: 143 ± 1.4 mJy
35 GHz: 160 ± 1.7 mJy
We find no evidence for Nova Cen being resolved in the 35 GHz image which does not include antenna 6 (beam 9x6 arcsec, PA 64 degrees).
Given the very high flux density, we conclude that Nova Cen 2013 is nearby and undergone a very massive ejection, or that there is significant synchrotron emission.
We encourage continued follow-up at all wavelengths.
The next opportunity to observe this source with the ATCA will be on 2014 April 11.
