[IAUC] CBET 3088: 20120422 : SUPERNOVA 2012bu IN NGC 3449 = PSN J10525661-3256071

[quai en eps.harvard.edu]

                                                  Electronic Telegram No. 3088
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 2012bu IN NGC 3449 = PSN J10525661-3256071
     S. Howerton, Arkansas City, KS, U.S.A.; A. J. Drake, S. G. Djorgovski,
A. Mahabal, M. J. Graham, and R. Williams, California Institute of Technology;
J. L. Prieto, Princeton University; M. Catelan, Pontificia Universidad Catolica
de Chile; R. H. McNaught and G. Garradd, Australian National University; E. C.
Beshore and S. M. Larson, Lunar and Planetary Laboratory, University of
Arizona; and E. Christensen, Gemini Observatory, report the discovery of an
apparent supernova in public images from the Siding Spring Survey (SSS).

 SN       2012 UT       R.A. (2000.0) Decl.      Mag.      Offset
 2012bu   Jan. 16.69   10 52 56.61  -32 56 07.1   18.4    37".2 E, 27".7 S

The variable was designated PSN J10525661-3256071 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2012bu based on the
spectroscopic confirmation reported below.  Further CCD magnitudes for 2012bu:
2010 June 26.40 UT, [19.2 (SSS); 2012 Jan. 18.436, 17.9 (Joseph Brimacombe,
Cairns, Australia; 51-cm RCOS telescope + STL11K camera + luminance filter at
the New Mexico Skies Observatory near Mayhill, NM, U.S.A.; position end
figures 56s.53, 07".7); 18.45, 18.3 (L. Elenin, Lyubertsy, Russia; remotely
taken at the ISON-NM Observatory near Mayhill with a 0.45-m f/2.8 telescope;
position end figures 56s.52, 07".7; UCAC3 reference stars; limiting mag about
20.0).  The image by Brimacombe is posted at the following website URL:
http://www.flickr.com/photos/43846774@N02/6722843895/.

     N. Morrell, Las Campanas Observatory; P. Lopez and P. Lira, Universidad
de Chile; and G. Pignata and F. Bufano, Universidad Andres Bello, report that
an optical spectrogram (range 370-910 nm) of PSN J10525661-3256071 = SN 2012bu,
obtained on Mar. 30.14 UT with the du Pont 2.5-m telescope (+ WFCCD) at Las
Campanas Observatory, shows it to be a type-II supernova.  Adopting a
recession velocity of 3274 km/s for NGC 3449 (Theureau et al., 1998, A.Ap.
Suppl. 130, 333; via NED), the best fits to this spectrum found by GELATO
(Harutyunyan et al. 2008, A.Ap. 488,383; publicly available at website URL
https://gelato.tng.iac.es) is with spectra of evolved type-II-plateau
supernovae.


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

                         (C) Copyright 2012 CBAT
2012 April 22                    (CBET 3088)              Daniel W. E. Green