Electronic Telegram No. 2588

Central Bureau for Astronomical Telegrams
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138,
U.S.A. IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
URL http://www.cfa.harvard.edu/iau/cbat.html

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NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars.

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