Electronic Telegram No. 2872
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 2011gz = PSN J00374627-3339514
     J. Maza, M. Hamuy, R. Antezana, L. Gonzalez, R. Cartier, S. Silva, F.
Carrasco, P. Sanchez, C. Hervias, D. Iturra, and R. Ramirez, Universidad de
Chile; G. Pignata and M. Cifuentes, Universidad Andres Bello; C. Farias,
Pontificia Universidad Catolica de Chile; B. Conuel, Wesleyan University;
G. Folatelli, IPMU, University of Tokyo; and D. Reichart, K. Ivarsen, J.
Haislip, A. Crain, D. Foster, M. Nysewander, and A. LaCluyze, University of
North Carolina at Chapel Hill, on behalf of the CHASE project (which is part
of the Millennium Center for Supernova Science collaboration), report the
discovery of an apparent supernova (mag approximately 15.9) on an unfiltered
image taken on Oct. 3.02 UT with the 0.41-m 'PROMPT 3' telescope located at
Cerro Tololo.  The new object, which is also present at mag approximately
15.7 in an image taken on Oct. 6.03, is located at R.A. = 0h37m46s.27 +/-
0".2, Decl. = -33o39'51".4 +/- 0".2 (equinox 2000.0), which is about 0".1
west and 0".3 north of center of the presumed host galaxy.  Nothing is
visible at this position on archival images taken on 2010 Oct. 23.12 and
30.09 (limiting mag 18.0).  The object was designated PSN J00374627-3339514
when it was posted on the Central Bureau's TOCP webpage and is here designated
SN 2011gz based on the spectroscopic confirmation reported below.

     G. Pignata, Universidad Andres Bello; J. Anderson, T. De Jaeger and S.
Gonzalez Universidad de Chile on behalf of the Millennium Center for Supernova
Science, report on optical spectroscopy (range 350-880 nm) of PSN
J00374627-3339514 = SN 2011gz, obtained on Oct. 17.1 UT with the SOAR
telescope (+ Goodman instrument).  Cross-correlation with a library of
supernova spectra using the "Supernova Identification" code (SNID; Blondin and
Tonry 2007, Ap.J. 666, 1024) gives good matches to type-Ia supernovae about a
week after B-band maximum brigthness.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2011 CBAT
2011 October 25                  (CBET 2872)              Daniel W. E. Green