Electronic Telegram No. 2588
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 2010kt
     J. Maza, M. Hamuy, R. Antezana, L. Gonzalez, R. Cartier, F. Forster, and
S. Silva, Universidad de Chile; G. Pignata and M. Cifuentes, Universidad Andres
Bello; P. Gonzalez, 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,
report the discovery of an apparent supernova (mag approximately 16.8 +/-
0.5) in the galaxy cluster NGC 1759 on an unfiltered CCD image taken on Dec.
10.31 UT with the 0.41-m 'PROMPT 1' telescope located at Cerro Tololo.  The
new object, which is also present a mag approximately 17.0 in images taken on
Dec. 12.04 and 13.20, is located at R.A. = 5h00m39s.19 +/- 0".2, Decl. =
-38o40'46".1 +/- 0".2 (equinox 2000.0).  Nothing is visible at this position
on archival images taken on Oct. 15.28 (limiting mag 18.0) and Sept. 7.25
(limiting mag 18.5).

     G. Pignata, Universidad Andres Bello; and G. Folatelli, IPMU, University
of Tokyo; on behalf of the Millennium Center for Supernova Science, report on
an optical spectrogram (range 355-887 nm) of 2010kt obtained on Dec. 13.14 UT
with the SOAR telescope (+ Goodman HTS).  The spectrum shows 2010kt to be a
normal type-Ia supernova at about two weeks after maximum light.  Cross-
correlation with a library of supernova spectra using the "Supernova
Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) provides
good matches with spectra of SNe 1989B, 1994D, and 1996X between +12 and +14
days.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2010 CBAT
2010 December 13                 (CBET 2588)              Daniel W. E. Green