[IAUC] CBET 2740: 20110610 : SUPERNOVA 2011dj IN PGC 45427 = PSN J13070669-0110440

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                                                  Electronic Telegram No. 2740
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 2011dj IN PGC 45427 = PSN J13070669-0110440
     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; E. C. Beshore and S. M.
Larson, Lunar and Planetary Laboratory, University of Arizona; and E.
Christensen, Gemini Observatory, report the Catalina Real-time Transient
Survey's discovery of an apparent supernova in unfiltered Catalina Sky Survey
(CSS) images, as tabulated below.  The variable was designated PSN
J13070669-0110440 when posted on the Central Bureau's TOCP webpage and is
here designated SN 2011dj based on the spectroscopic report below.

 SN       2011 UT       R.A. (2000.0) Decl.      Mag.      Offset
 2011dj   June 4.21   13 07 06.69  - 1 10 44.0   15.8    15".7 E, 7".2 S

Additional CCD magnitudes for 2011dj:  May 25.28 UT, [20.0 (CSS); June 4.563,
R = 15.7 (Joseph Brimacombe, Coral Towers Observatory, Cairns, Australia;
30-cm reflector + STL6K camera; five 600-s stacked images; position end
figures 06s.67, 45".5); 7.567, R = 15.1 (S. Baroni, L. Buzzi, P. Concari, S.
Foglia, G. Galli, and M. Tombelli; remotely using a 0.18-m f/2.8 reflector
at the Tzec Maun Observatory, Moorook, Australia; position end figures 06s.69,
45".0); 9.424, R = 15.4 (Baroni et al.).  Foglia adds that nothing is visible
at the position of 2011dj in NEAT images from 2002 Apr. 14 and 2003 Apr. 9
(no limiting magnitudes provided).  Brimacombe's image is posted at website
URL http://www.flickr.com/photos/43846774@N02/5799770906/.  Foglia notes that
their image from June 7 is posted at the following website URL:
URL http://www.apan.it/pianetini/pub/psn/pgc45427.htm.

     L. Tomasella, P. Ochner, S. Valenti, and S. Benetti, Istituto Nazionale
di Astrofisica, Osservatorio Astronomico di Padova; and A. Pastorello,
Dipartimento di Astronomia, Universita di Padova, on behalf of a larger
collaboration, report that a spectrogram (range 390-810 nm; resolution 2.2 nm)
of PSN J13070669-0110440 = SN 2011dj, obtained on June 6.87 UT with the
Ekar-Copernicus 1.82-m telescope (+ AFOSC), shows it to be a type-Ia supernova,
a couple of days before maximum.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2011 CBAT
2011 June 10                     (CBET 2740)              Daniel W. E. Green