[IAUC] CBET 3331: 20121205 : SUPERNOVA 2012hh IN UGC 2180 = PSN J02423962+3931555

Mie Dic 5 13:25:30 ART 2012

                                                  Electronic Telegram No. 3331
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
CBAT Director:  Daniel W. E. Green; Hoffman Lab 209; Harvard University;
 20 Oxford St.; Cambridge, MA  02138; U.S.A.
e-mail:  cbatiau en eps.harvard.edu (alternate cbat en iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


SUPERNOVA 2012hh IN UGC 2180 = PSN J02423962+3931555
     J. Newton and T. Puckett report the discovery of an apparent supernova
(mag 17.5) on unfiltered CCD images (limiting mag 19.2) taken with a 0.40-m
reflector at Portal, AZ, U.S.A.,on Nov. 22.3503 UT in the course of the
Puckett Observatory Supernova Search.  The new object is located at R.A. =
2h42m39s.62, Decl. = +39o31'55".5 (equinox 2000.0), which is 4".3 west and
7".9 south of the center of UGC 2180.  Puckett has posted an image of the
variable at website URL http://www.possdata.com/PSNJ02423962+3931555.jpg.
The variable was designated PSN J02423962+3931555 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2012hh based on the
spectroscopic confirmation reported below.  Additional CCD magnitudes for
2012hh:  2011 Oct. 19, [19.2 (Puckett); 2012 Nov. 23.058, 17.4 (R. Post,
Trenton, ME, U.S.A.; 0.43-m reflector; limiting mag 19.4; communicated by
Puckett); 24.126, 16.6 (R. A. Koff, Bennett, CO, USA; Meade 0.25-m f/10
reflector + Apogee U-47 camera; limiting magnitude 19.5; position end figures
39s.57, 54".7; UCAC3 reference stars; image posted at website URL
http://antelopehillsobservatory.org/SNpictures/PSNJ02423962+3931555final.jpg);
25.210, R = 17.3 (Joseph Brimacombe, Cairns, Australia; remotely using a 51-cm
RCOS telescope at the New Mexico Skies Observatory near Mayhill, NM, U.S.A.;
position end figures 39s.56, 54".2; image posted at the following website URL:
http://www.flickr.com/photos/43846774@N02/8221737229/); Dec. 3.957, R_c = 17.1
(Massimiliano Martignoni, Magnago, Italy, 0.25-m f/10 Schmidt-Cassegrain
reflector; position end figures 39s.52, 54".0); 4.908, R_c = 16.7 (Martignoni;
position end figures 39s.58, 54".0).  Unfiltered exposures obtained by
Federica Luppi and Luca Buzzi with a 0.38-m f/6.8 reflector at Varese, Italy,
around Dec. 2.983 yield position end figures 39s.53, 55".1 (reference stars
from the CMC-14 catalogue); their image is posted at the following website
URL:  http://www.astrogeo.va.it/pub/TOCP/PSN_U2180.jpg.

     L. Tomasella, S. Benetti, E. Cappellaro, P. Ochner, A. Pastorello, and M.
Turatto, Osservatorio Astronomico di Padova, Istituto Nazionale di Astrofisica,
report that optical spectroscopy (range 340-820 nm; resolution 1.3 nm),
obtained on Dec. 5.04 UT with the Asiago 1.82-m Copernico Telescope (+ AFOSC;
range 350-820 nm, resolution 1.3 nm), indicates that PSN J02423962+3931555 =
2012hh is a type-Ia supernova about two weeks after maximum light at redshift
z = 0.031188 (Theureau et al. 1998, A.Ap. Supple. 130, 333; via NED).  The
expansion velocity, deduced from the Si II 635.5-nm absorption, is about
10000 km/s.  The Asiago classification spectra are posted at website URL
http://graspa.oapd.inaf.it; classification was made via GELATO (Harutyunyan
et al. 2008, A.Ap. 488, 383) and SNID (Blondin and Tonry 2007, Ap.J. 666,
1024).


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                         (C) Copyright 2012 CBAT
2012 December 5                  (CBET 3331)              Daniel W. E. Green