[IAUC] CBET 2778: 20110803 : SUPERNOVA 2011ej

[quai en eps.harvard.edu]

                                                  Electronic Telegram No. 2778
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)
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SUPERNOVA 2011ej
     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 discovery of an apparent supernova
in unfiltered Catalina Sky Survey (CSS) images:

 SN       2011 UT       R.A. (2000.0) Decl.      Mag.
 2011ej   July 3.36   22 00 42.26  - 8 15 42.0   18.8

Further CSS magnitudes for 2011ej:  June 4.44 UT, [20.3; 23.39, 18.9.

     A. S. Moskvitin, T. A. Fatkhullin, V. N. Komarova, V. V. Sokolov, and
T. N. Sokolova, Special Astrophysical Observatory (SAO), Russian Academy of
Sciences, report that a CCD spectrogram (range 380-790 nm; 1-nm resolution)
was taken of 2011ej with the 6-m BTA telescope (+ Scorpio) on July 7 UT.
The spectrum reveals strong H I and Fe II lines.  Cross-correlation with a
library of supernova spectra using the "Supernova Identification" code (SNID;
Blondin and Tonry 2007, Ap.J. 666, 1024) shows matches with the spectrum of
the type-II-P supernova 2004et at phase +6 days, redshifted to z = 0.042 +/-
0.004.  The authors report magnitude V = 18.91 +/- 0.03 for 2011ej, obtained
with the same instrument on July 7.988.


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                         (C) Copyright 2011 CBAT
2011 August 3                    (CBET 2778)              Daniel W. E. Green