| 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.
= -38°40'46".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sometimes superseded by text appearing later in the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.
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