Electronic Telegram No. 2694
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 2011bl IN UGC 8554 = PSN J13341470+3712348
     Further to CBET 2678, I. Nayak, S. B. Cenko, W. Li, and A. V. Filippenko
report the LOSS discovery of an apparent supernova on unfiltered KAIT images:

 SN       2011 UT       R.A. (2000.0) Decl.      Mag.      Offset
 2011bl   Apr. 5.41   13 34 14.70  +37 12 34.8   16.9    0".4 W, 6".2 N

This object was designated PSN J13341470+3712348 when posted on the Central
Bureau's TOCP webpage and is here designated SN 2011bl based on the
spectroscopic report below.  Additional unfiltered CCD magnitudes for 2011bl:
Mar. 10.46 UT, [19.3 (KAIT); Apr. 6.21, 16.6 (KAIT); 8.232, 16.0 (Joseph
Brimacombe, Cairns, Australia; remotely using a 51-cm RCOS telescope + STL11K
camera at New Mexico Skies Observatory, Mayhill, NM, U.S.A.; position end
figures 14s.66, 35".0); 8.335, 16.5 (R. A. Koff, Bennett, CO, U.S.A.; position
end figures 14s.60, 33".5).  Brimacombe has posted his image at website URL
http://www.flickr.com/photos/43846774@N02/5602376520/.

     E. Gall, S. Taubenberger, and I. Maurer, Max-Planck-Institut fuer
Astrophysik; R. Pakmor, Heidelberger Institut fuer Theoretische Studien; and
S. Valenti and S. Benetti, Instituto Nazionale di Astrofisica, Osservatorio
Astronomico di Padova, on behalf of a larger collaboration, report that
optical spectra (range 380-820 nm; resolution 1.1 nm) of PSN J13341470+3712348
= SN 2011bl were obtained with the Ekar-Copernicus 1.82-m telescope (+ AFOSC)
on Apr. 11.1 UT.  After cross-correlation with a library of supernova spectra
via the "GELATO" code (Harutyunyan et al. 2008, A.Ap. 488, 383; available at
website URL https://gelato.tng.iac.es/login.cgi), 2011bl is identified as a
very young type-Ib/c supernova, around 10 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      superseded by text appearing later in the printed IAU Circulars.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 April 12                    (CBET 2694)              Daniel W. E. Green