[IAUC] CBET 2885: 20111101 : SUPERNOVA 2011he

[quai en eps.harvard.edu]

                                                  Electronic Telegram No. 2885
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 2011he
     A. J. Drake, S. G. Djorgovski, A. Mahabal, M. J. Graham, and R. Williams,
California Institute of Technology; J. L. Prieto, Princeton University; 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.      Offset
 2011he   Oct. 20.23   22 36 46.72  +20 21 31.2   18.1    2".3 W, 0".7 N

Further CSS magnitudes for 2011he:  June 7.40 UT, [20.4; Sept. 19.38, 18.2.

     L. Tomasella, A. Pastorello, S. Valenti, and S. Benetti, Istituto
Nazionale di Astrofisica (INAF), Osservatorio Astronomico di Padova, on behalf
of a larger collaboration, report that a spectrogram of 2011he, obtained on
Oct. 29.78 UT with the Ekar-Copernico 1.82-m telescope (+ AFOSC; range
360-810 nm; resolution 2.2 nm), suggests that it is a type-Ia supernova at z
= 0.05 and several weeks after its B-band maximum brightness.  The spectrum
shares similarity with those of type-Ia supernovae of the 1991T-like subgroup.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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                         (C) Copyright 2011 CBAT
2011 November 1                  (CBET 2885)              Daniel W. E. Green