[IAUC] CBET 2550: 20101116 : SUPERNOVAE 2010ju, 2010jv, AND 2010jw
quai en eps.harvard.edu
quai en eps.harvard.edu
Mie Sep 14 16:19:26 ART 2011
Electronic Telegram No. 2550
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 en eps.harvard.edu (alternate cbat en iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network
SUPERNOVAE 2010ju, 2010jv, AND 2010jw
R. Kirshner and P. Challis, Harvard-Smithsonian Center for Astrophysics
(CfA); and T. Matheson, National Optical Astronomical Observatory, on behalf
of the CfA Supernova Group, report on spectroscopic observations (range
320-850 nm) obtained on Nov. 16.3 UT with the MMT (+ blue-channel
spectrograph) of the three apparent supernovae announced on CBET 2549.
Cross-correlation with a library of supernova spectra using the "Supernova
Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) indicates
that 2010ju is a type-Ia supernova about one week before maximum light; the
velocity of the Si II minimum is blueshifted by about 16000 km/s in the
supernova's restframe. The spectrogram of 2010jv shows the spectrum of a
type-Ia supernova at maximum, with a blueshift of 11000 km/s at the Si II
line. The spectrogram of 2010jw has a spectrum that resembles the type-Ic
supernova 2004eu at five days past maximum light.
NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.
(C) Copyright 2010 CBAT
2010 November 16 (CBET 2550) Daniel W. E. Green
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