Electronic Telegram No. 2886
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@eps.harvard.edu (alternate cbat@iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


SUPERNOVA 2011hf
     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
 2011hf   Oct. 17.11   22 16 51.14  - 3 15 55.0   17.7

Nothing was visible at this position on a CSS image taken on Sept. 27.18 UT
(limiting mag 20.0).

     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 2011hf, obtained on
Oct. 29.84 UT with the Ekar-Copernico 1.82-m telescope (+ AFOSC; range 360-810
nm; resolution 2.2 nm), is that of a type-Ia supernova at a redshift 0.054.
Cross-correlation with a library of supernova spectra using the "Supernova
Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) suggests
a normal type-Ia supernova about 10 after its B-band maximum brightness.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2011 CBAT
2011 November 1                  (CBET 2886)              Daniel W. E. Green