Electronic Telegram No. 3008
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@eps.harvard.edu (alternate cbat@iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


SUPERNOVA 2012V IN NGC 6829 = PSN J19471032+5954599
     Giancarlo Cortini, Predappio, Italy, reports his discovery of an apparent
supernova (mag 16.1) on unfiltered CCD images taken on Jan. 25.79 UT with a
Celestron 14 telescope (+ SXVRH9 camera).  The new object is located at R.A. =
19h47m10s.32, Decl. = +59d54'59".9 (equinox 2000.0), which is 18" east and 36"
north of the center of NGC 6829.  Nothing is visible at this position on
Palomar Sky Survey red and blue plates (no limiting magnitudes provided).  The
variable was designated PSN J19471032+5954599 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2012V based on the
spectroscopic confirmation reported below.  Additional CCD magnitudes for
2012V (unfiltered unless noted otherwise):  Jan. 12.75, [18.5 (Cortini); 17.70,
[18.5 (Cortini); 25.995, R = 15.5 (Xing Gao, Urumqi, China; Xingming 0.36-m
reflector, Mt. Nanshan; position end figures 10s.28, 59".9; image posted at
URL http://www.flickr.com/photos/75232843@N06/6764372619/in/photostream);
26.098, 16.0 (Joseph Brimacombe, Cairns, Australia; remotely using a 51-cm
RCOS telescope + STL11K camera + luminance filter at the New Mexico Skies
Observatory near Mayhill, NM, U.S.A.; position end figures 10s.31, 59".5;
image posted at URL http://www.flickr.com/photos/43846774@N02/6765075879/);
26.504, 15.4 (R. A. Koff, Bennett, CO, USA; Meade 0.25-m f/10 reflector +
Apogee AP-47p camera; limiting magnitude 17.8; position end figures 10s.35,
59".7; UCAC3 reference stars).

     S. Valenti, A. Pastorello, L. Tomasella, and S. Benetti, Osservatorio
Astronomico di Padova, Istituto Nazionale di Astrofisica, report that a
spectrum (range 330-820 nm; resolution 2.4 nm) of PSN J19471032+5954599 = SN
2012V was obtained on Jan. 30.21 UT with the Ekar-Copernico 1.82-m telescope
(+ AFOSC).  Cross-correlation with a library of supernova spectra via the
"Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666,
1024) shows that 2012V is a type-Ia supernova similar to SN 1989B about one
week before the B-band maximum light.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2012 CBAT
2012 January 31                  (CBET 3008)              Daniel W. E. Green