[IAUC] CBET 2750: 20110626 : SUPERNOVA 2011dr IN PGC 64099 = PSN J20062026-4245581

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                                                  Electronic Telegram No. 2750
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 2011dr IN PGC 64099 = PSN J20062026-4245581
     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, Carnegie Observatories; 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), with the discovery observation tabulated below:

 SN       2011 UT       R.A. (2000.0) Decl.      Mag.      Offset
 2011dr   May 25.82   20 06 20.26  -42 45 58.1   17.8    9".7 W, 7".0 S

The variable was designated PSN J20062026-4245581 when posted on the Central
Bureau's TOCP webpage and is here designated SN 2011dr based on the
spectroscopic confirmation below.  Additional magnitudes for 2011dr:  Apr.
30.73 UT, [19.2 (SSS); May 26.732, 17.0 (Joseph Brimacombe, Coral Towers
Observatory, Cairns, Australia; 30-cm telescope + STL6K camera + red filter;
position end figures 20s.28, 56".5).  Brimacombe's image is posted at website
URL http://www.flickr.com/photos/43846774@N02/5763117132/.

     S. Valenti and S. Benetti, Istituto Nazionale di Astrofisica, Osservatorio
Astronomico di Padova, on behalf of a larger collaboration, report that a
spectrogram (range 330-750 nm; resolution 1.5 nm) of PSN J20062026-4245581
= SN 2011dr, obtained on June 26.40 UT with the European Southern Observatory's
New Technology Telescope (+ EFOSC), is that of a type-IIP supernova.  After
cross-correlation with a library of supernova spectra via the "GELATO" code
(Harutyunyan et al. 2008, A.Ap. 488, 383; available at website URL
https://gelato.tng.iac.es/login.cgi), the spectrum of SN 2011dr appears to be
very similar to that of SN 1999gi (Leonard et al. 2002, A.J. 124, 2490)
at one month after explosion.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2011 CBAT
2011 June 26                     (CBET 2750)              Daniel W. E. Green