[IAUC] CBET 3235: 20120922 : SUPERNOVA 2012ey IN PGC 9159 = PSN J02245064+1610543

Sab Sep 22 16:23:11 ART 2012

                                                  Electronic Telegram No. 3235
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 2012ey IN PGC 9159 = PSN J02245064+1610543
     S. Howerton, Arkansas City, KS, U.S.A.; A. J. Drake, S. G. Djorgovski,
M. J. Graham, A. Mahabal, and R. Williams, California Institute of Technology;
J. L. Prieto, Princeton University; M. Catelan, Pontificia Universidad
Catolica de Chile; and E. Christensen and S. M. Larson, Lunar and Planetary
Laboratory, University of Arizona, report the discovery of an apparent
supernova in public images from the Mount Lemmon Survey (MLS).

 SN       2012 UT        R.A. (2000.0) Decl.      Mag.      Offset
 2012ey   Sept. 16.44   2 24 50.64  +16 10 54.3   18.6    8".2 W, 15".6 N

The variable was designated PSN J02245064+1610543 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2012ey based on the
spectroscopic confirmation reported below.  Additional magnitudes for 2012ey:
Feb. 25.12 UT, [21.0 (MLS); Sept. 18.103, 19.1 (Federica Luppi and Luca Buzzi,
Varese, Italy; 0.38-m f/6.8 reflector; position end figures 50s.53, 52".2;
reference stars from CMC14 catalogue; image posted at the following website
URL:  http://www.astrogeo.va.it/pub/TOCP/PSN_P9159.jpg).  Joseph Brimacombe,
Cairns, Australia obtained images of 2012ey remotely using a 51-cm RCOS
telescope (+ STL11K camera + luminance filter) at the New Mexico Skies
Observatory near Mayhill, NM, U.S.A. on Sept. 17.281; his image is posted at
website URL http://www.flickr.com/photos/43846774@N02/8000934977/.

     M. Turatto, M. L. Pumo, S. Vanni, S. Benetti, A. Pastorello, L. Tomasella,
P. Ochner, E. Cappellaro, and S. Valenti, Osservatorio Astronomico di Padova,
Istituto Nazionale di Astrofisica, report that a spectrogram of PSN
J02245064+1610543 = SN 2012ey, obtained on Sept. 18.02 UT with the Asiago
1.82-m Copernico Telescope (+ AFOSC; range 340-820 nm; resolution 1.4 nm),
shows broad Balmer lines with P-Cyg profiles.  Adopting for the host galaxy
(PGC 9159) the redshift z = 0.0272 (via LEDA), the best fit with the GELATO
software tool (Harutyuyan et al. 2008, A.Ap. 488, 383) using a library of
supernovae spectra is with a type-II or type-IIb supernova about one week
past maximum.

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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2012 CBAT
2012 September 22                (CBET 3235)              Daniel W. E. Green