SUPERNOVA
2011ic = PSN J10153321-2034060 [Editor's note: this
text replaces that on CBET 2912.]
J. Maza, M. Hamuy, R. Antezana, L. Gonzalez, R. Cartier,
F. Forster, S. Silva, F. Carrasco, P. Sanchez, C.
Hervias, and R. Ramirez, Universidad de Chile; G.
Pignata, M. Cifuentes, Y. Apostolovski, and M. Vidal,
Universidad Andres Bello; C. Farias and F. Aros, 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 16.0)
on unfiltered images taken on Nov. 18.30 and 20.33
UT with the 0.41-m 'PROMPT 5' telescope located at
Cerro Tololo. The new object is located at R.A. =
10h15m33s.21 +/- 0".2, Decl. = -20°34'06".0 +/- 0".2
(equinox 2000.0), which is about 7".5 east and 55".4
north of the center of the presumed host galaxy. Nothing
is visible at this position on archival images taken
on May 15.98 (limiting mag 18.5). The variable was
designated PSN J10153321-2034060 when it was posted
on the Central Bureau's TOCP webpage and is here designated
SN 2011ic based on the spectroscopic confirmation
reported below.
M. Stritzinger, Oskar Klein Centre, Stockholm University,
on behalf of the Millennium Center for Supernova Science,
reports that he obtained a spectrogram on May 21.2
UT of PSN J10153321-2034060 = SN 2011ic with the Gemini-South
telescope (+ GMOS). The spectrum reveals 2011ic to
be a type-Ia supernova around a month past maximum.
Comparison with a library of supernova spectra using
the SNID program (Blondin and Tonry 2007, Ap.J. 666,
1024) provides excellent matches with SN 2002bo between
40 and 50 days past maximum.
NOTE: These 'Central Bureau Electronic
Telegrams' are sometimes superseded by text appearing
later in the printed IAU Circulars.