Electronic Telegram No. 324
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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SUPERNOVA 2005ls IN MCG +07-7-1
     M. Modjaz, S. Blondin, R. Kirshner, and P. Challis, Harvard-Smithsonian
Center for Astrophysics, report that a spectrum (range 450-740 nm) of SN
2005ls (cf. IAUC 8643), obtained on Dec. 21.21 UT by M. Calkins with
the F. L. Whipple Observatory 1.5-m telescope (+ FAST), shows it to be a
type-Ia supernova, with a spectral-feature age (Riess et al. 1997, A.J.
114, 722) of about 8 (+/- 2) days after maximum light.  Adopting a
recession velocity of 6331 km/s for the host galaxy (Falco et al. 1999,
PASP 111, 438), the maximum absorption in the Si II line (rest 635.5 nm)
is blueshifted by 11000 km/s.  Interstellar Na I D absorption at the
redshift of the host galaxy is visible in the spectrum with an equivalent
width of 0.2 nm.


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                         (C) Copyright 2005 CBAT
2005 December 21                 (CBET 324)               Daniel W. E. Green