[IAUC] CBET 2774: 20110728 : SUPERNOVA 2011eg IN UGC 11343 = PSN J18425421+5302415

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                                                  Electronic Telegram No. 2774
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 2011eg IN UGC 11343 = PSN J18425421+5302415
     J. Newton, A. Sehgal, and T. Puckett report the discovery of an apparent
supernova (mag 17.5) on an unfiltered CCD image (limiting mag 19.3) taken with
a 0.50-m reflector at Osoyoos, British Columbia, on July 23.288 UT in the
course of the Puckett Observatory Supernova Search.  The new object is
located at R.A. = 18h42m54s.21, Decl. = +53o02'41".5 (equinox 2000.0), which
is 30".2 west and 6".2 south of the center of UGC 11343.  Nothing is visible
at this position on images taken by Puckett on 2011 Mar. 10 (limiting mag
19.1).  The variable was designated PSN J18425421+5302415 when it was posted on
the Central Bureau's TOCP webpage and is here designated SN 2011eg based on
the spectroscopic report below.  Puckett has posted an image at website URL
http://possdata.com/PSNJ18425421+5302415.jpg.  Additional magnitudes for
2011eg:  July 24.281, 17.4 (Sehgal); July 24, 17.5 (Joseph Brimacombe, Cairns,
Australia; remotely with a 51-cm RCOS telescope + STL11K camera at the New
Mexico Skies observatory near Mayhill, NM, U.S.A., position end figures 54s.20,
41".4).  Brimacombe's image is posted at the following website URL:
http://www.flickr.com/photos/43846774@N02/5969743681/.

     D. D. Balam, Dominion Astrophysical Observatory, National Research Council
of Canada (NRCC); M. L. Graham, Las Cumbres Observatory Global Telescope,
University of California at Santa Barbara; E. Y. Hsiao, Lawrence Berkeley
Laboratory; and D. W. E. Green, Harvard University, report that a spectrogram
(range 383-717 nm, resolution 0.3 nm) of PSN J18425421+5302415 = SN 2011eg,
obtained on July 23.48 UT with the 1.82-m Plaskett Telescope of the NRCC, shows
it to be a type-II-plateau supernova several days past maximum light.
Cross-correlation with a library of supernova spectra using the "Supernova
Identification" code (Blondin and Tonry 2007, Ap.J. 666, 1024) indicates that
2011eg is most similar to the type-II-plateau supernova 2004et at 4 days past
maximum light.  A second spectrogram taken on July 28.35 shows 2011eg to be
a type-IIp supernova most similar to SN 1999em within several weeks of
maximum light.


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

                         (C) Copyright 2011 CBAT
2011 July 28                     (CBET 2774)              Daniel W. E. Green