[IAUC] CBET 2832: 20110928 : SUPERNOVA 2011fz IN UGC 12271 = PSN J22582030+0217299

[quai en eps.harvard.edu]

                                                  Electronic Telegram No. 2832
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 2011fz IN UGC 12271 = PSN J22582030+0217299
     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 Catalina
Sky Survey (CSS).

 SN       2011 UT        R.A. (2000.0) Decl.      Mag.      Offset
 2011fz   Sep. 18.28   22 58 20.30  + 2 17 29.9   16.6    13".3 W, 23".0 S

The new object was designated PSN J22582030+0217299 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2011fz based on the
spectroscopic report below.  Additional unfiltered CCD magnitudes for 2011fz:
July 2.38 UT, 19.0 (CSS); Sept. 19.381, 17.9 (Joseph Brimacombe, Cairns,
Australia; position end figures 20s.26, 29".2; image posted at website URL
http://www.flickr.com/photos/43846774@N02/6170077719/); 19.89, 17.1 (Nick
James, Chelmsford, Essex, England; Celestron 11 telescope + ST9XE camera;
position end figures 20s.26, 29".0; UCAC-3 reference stars).

     S. Valenti, S. Benetti, L. Tomasella, and P. Ochner, Osservatorio
Astronomico di Padova, Istituto Nazionale di Astrofisica; and A. Pastorello,
Dipartimento di Astronomia, Universita di Padova, on behalf of a larger
collaboration, report that a spectrogram of PSN J22582030+0217299 = SN 2011fz,
obtained on Sept. 24.95 UT, suggests that it is a type-Ib/c supernova observed
several weeks after maximum.  Using the distance module of 34.14 for UGC 12271
(Mould et al. 2000, Ap.J. 529, 786; via the NED website) and an apparent
magnitude of 17.7, 2011fz has an absolute magnitude of -16.45, which is
consistent with magnitudes of type-Ib/c supernovae at this phase.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2011 CBAT
2011 September 28                (CBET 2832)              Daniel W. E. Green