Supernova SN2012C Discovered January 4, 2012

Image courtesy of Doug Rich

Image courtesy of Doug Rich

Discovery overview

Discovering party: Doug Rich
Official name: SN2012C
Category: Supernova
Subcategory: type Ic
Location: Galaxy NGC 2926 in the constellation Leo

Confirmation

Spectra of SN2012C were obtained with the 2.5 meter Isaac Newton Telescope in the Canary Islands and the 6.5 meter MMT Telescope in southern Arizona).

Official CBAT report

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 2012C IN NGC 2926 = PSN J09373048+3250315
     D. Rich, Hampden, ME, U.S.A, reports his discovery of an apparent
supernova (mag about 16.8) on unfiltered CCD frames (limiting mag 18.8) taken
with a 0.41-m reflector on Jan. 4.177 UT.  The new object is located at R.A. =
9h37m30s.48, Decl. = +32o50'31".5 (equinox 2000.0) which is about 6".5 west
and 2".5 north of the center of NGC 2926.  The variable was designated PSN
J09373048+3250315 when it was posted at the Central Bureau's TOCP webpage and
is here designated SN 2012C based on the spectroscopic confirmation reported
below.  Additional magnitudes for 2012C (from unfiltered CCD images unless
noted otherwise):  1996 Mar. 18, [21.0 (Digital Sky Survey image, blue plate;
via Rich); 1998 Apr. 16, 20.5 (Palomar DSS image, red plate; via Rich); 2011
Mar. 25.136, [19.0 (Rich); 2012 Jan. 6.178, 16.7 (Rich); 6.213, 15.6 (L.
Elenin, Lyubertsy, Russia; three co-added 300-s images obtained remotely at
the ISON-NM Observatory near Mayhill, NM, USA, with a 0.45-m f/2.8 telescope
+ KAF09000 CCD; limiting mag about 19.8; position end figures 30s.64, 31".6,
estimated uncertainty +/- 0".1; UCAC3 reference stars); 6.532, 17.5 (Joseph
Brimacombe, Cairns, Australia; remotely using a 51-cm RCOS telescope + STL11K
camera + luminance filter at the New Mexico Skies Observatory near Mayhill;
four stacked 10-min exposures; position end figures 30s.45, 32".5; image
posted at website URL http://www.flickr.com/photos/43846774@N02/6650598249/);
6.633, 15.6 (Brimacombe; 41-cm RCOS telescope + STL6K camera + infrared
filter, range > 700 nm; eleven 10-min stacked images; position end figures
30s.43, 32".3; image at http://www.flickr.com/photos/43846774@N02/6717903451/);
9.047, 17.4 (Federica Luppi and Luca Buzzi, Varese, Italy, 0.38-m f/6.8
reflector; position end figures 30s.49, 31".6; reference stars from CMC-14
catalogue; image posted at http://www.astrogeo.va.it/pub/TOCP/PSN_N2926.jpg).
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