[vsnet-alert 16813] Re: PSN J09554214+6940260: bright (11.7 mag) supernova in M82

walcom77 walcom77 at gmail.com
Wed Jan 22 19:17:47 JST 2014

Hi All

We performed some follow-up of this object through a 0.50-m f/6.8
astrograph + CCD + f/4.5 focal reducer from MPC Code H06 (iTelescope,
New Mexico). On our images taken on January 22.3, 2014 we can confirm
the presence of an optical counterpart with unfiltered CCD magnitude
11.3 and R-filtered magnitude 11.0 at coordinates:

R.A. = 09 55 42.17, Decl.= +69 40 25.9

(equinox 2000.0; UCAC-3 catalogue reference stars).

Our confirmation image of bright new supernova in M82:


An animation showing a comparison between our confirmation image and
the archive POSS2/UKSTU plate (R Filter - 1998):


Ernesto Guido, Nick Howes & Martino Nicolini

On Wed, Jan 22, 2014 at 10:13 AM, Patrick Schmeer
<pasc1312-aavso at yahoo.de> wrote:
> "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."
> http://www.astronomerstelegram.org/?read=5786

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