[vsnet-alert 16812] Re: PSN J09554214+6940260: bright (11.7 mag) supernova in M82

Patrick Schmeer pasc1312-aavso at yahoo.de
Wed Jan 22 18:13:56 JST 2014

"Classification of Supernova in M82 as a young, reddened Type Ia Supernova

ATel #5786; Y. Cao (Caltech), M. M. Kasliwal (Carnegie/Princeton), A. McKay (UT Austin), A. Bradley (APO) report on behalf of the intermediate Palomar Transient Factory Collaboration
on 22 Jan 2014; 08:47 UT
Credential Certification: Yi Cao (ycao at astro.caltech.edu)

Subjects: Optical, Supernovae

At UT 2014 Jan 22.305, we obtained a spectrum of PSN_J09554214+6940260 (discoverer: S. J. Fossey) with the Dual Imaging Spectrograph on the ARC 3.5m telescope. We classify this as a Type Ia supernova with a Si II velocity of 20000 km/s. The best superfit match is SN2002bo at -14d. The supernova has a red continuum and deep Na D absorption.

We further note that at UT 2014 Jan 21.158, the supernova is visible in Palomar 48-inch images but it is too saturated to measure a magnitude. iPTF upper limits (R=20.4 mag) are prior to Jan 13.

Panchromatic follow-up is encouraged."


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