[IAUC] CBET 2759: 20110704 : SUPERNOVA 2011dx IN NGC 1376 = PSN J03370500-0501560

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                                                  Electronic Telegram No. 2759
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 2011dx IN NGC 1376 = PSN J03370500-0501560
     L. A. G. Monard, Calitzdorp, Western Cape, South Africa, reports his
discovery of an apparent supernova (magnitude 16.5) on unfiltered CCD images
taken on June 27.182 UT at the Klein Karoo Observatory.  The new object
(which was designated PSN J03370500-0501560 when posted at the Central Bureau's
TOCP webpage and is here designated SN 2011dx based on the spectroscopic
confirmation reported below) is located at R.A. = 3h37m05s.61, Decl. =
-5d01'56".3 (equinox 2000.0), which is 6" west and 40" north of the core of
the Scd-type galaxy NGC 1376.  Nothing is seen at this position in Digitized
Sky Survey images down to limiting red magnitude 20.5.  Additional CCD
magnitudes for 2011dx:  Mar. 29.742, [18.5 (Monard); June 28.173, 16.6;
July 1.815, 16.9 (Joseph Brimacombe, Cairns, Australia; red filter used;
position end figures 05s.58, 56".1).  Brimacombe's image is posted at website
URL http://www.flickr.com/photos/43846774@N02/5892368075/.

     J. L. Prieto, Carnegie Observatories, reports that a spectrogram (range
380-920 nm; resolution 0.7 nm) of PSN J03370500-0501560 = SN 2011dx was
obtained on July 3 UT with WFCCD mounted on the du Pont 2.5-m telescope at
Las Campanas Observatory.  The SNID cross-correlation software (Blondin and
Tonry 2007, Ap.J. 666, 1024) was used to aid identification and age/redshift
estimation.  PSN J03370500-0501560 is an old type-Ia supernova.  The best
template fit to the spectrum is the peculiar supernova 2000cx at 1 month
after maximum light; however, there are also good fits using supernova-
1991T-like spectra at similar epochs.


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                         (C) Copyright 2011 CBAT
2011 July 4                      (CBET 2759)              Daniel W. E. Green