Electronic Telegram No. 2581
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


SUPERNOVAE 2010ji, 2010kq, AND 2010kr
     R. J. Foley and R. Chornock, Harvard-Smithsonian Center for Astrophysics,
on behalf of a larger collaboration, report that a spectrum (range 320-830 nm),
obtained on Dec. 10 UT with the Blue Channel Spectrograph on the 6.5-m MMT
telescope, shows that 2010ji (cf. CBET 2528) is a type-II supernova, a few
months after explosion; the absorption minimum of H-alpha is blueshifted by
5200 km/s.  SNe 2010kq (cf. CBET 2578) and 2010kr (cf. CBET 2579) are type-Ia
events.  Cross-correlation with a library of supernova spectra using the
"Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666,
1024) shows the best-fit ages for 2010kq and 2010kr are 1 day before and 23
days after maximum brightness, respectively.  SN 2010kq shows evidence for C
II 658.0-nm absorption blueshifted by 11800 km/s, which is a similar velocity
to that found for Si II 635.5-nm (11200 km/s).


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2010 CBAT
2010 December 10                 (CBET 2581)              Daniel W. E. Green