Electronic Telegram No. 481
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html


SUPERNOVAE 2006bo and 2006bq
     S. Blondin, M. Modjaz, R. Kirshner, and P. Challis,
Harvard-Smithsonian Center for Astrophysics, report that a spectrum
(range 350-740 nm) of SN 2006bo (cf. CBET 468, IAUC 8699), obtained on
Apr. 25.51 UT by J. Hernandez (University of Michigan) with the F. L.
Whipple Observatory 1.5-m telescope (+ FAST), shows it to be a reddened
type-IIn supernova around maximum light.  The spectrum consists of a
blue continuum, and narrow emission lines of H_alpha (800 km/s FWHM)
and H_beta (700 km/s FWHM), characteristic of type-IIn supernovae.
      Blondin et al. add that a spectrum (range 350-740 nm) of SN
2006bq (cf. CBET 479), obtained on Apr. 25.49 UT by Hernandez, shows it
to be a type-Ia supernova with a spectral-feature age (Riess et al.
1997, A.J. 114, 722) of 1 day past maximum light.  Adopting a recession
velocity of 4601 km/s for the host galaxy (O'Neil 2004, A.J. 128, 2080),
the maximum absorption in the Si II line (rest 635.5 nm) is blueshifted
by 12000 km/s.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2006 CBAT
2006 April 26                    (CBET 481)               Daniel W. E. Green