[IAUC] CBET 539: 20060605 : SUPERNOVA 2006cs IN MCG +06-30-79

[IAUC mailing list]

                                                  Electronic Telegram No. 539
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS en CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT en CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html


SUPERNOVA 2006cs IN MCG +06-30-79
     S. Blondin, M. Modjaz, R. Kirshner, and P. Challis, Harvard-Smithsonian
Center for Astrophysics, report that a spectrum (range 350-740 nm) of 2006cs
(cf. CBET 536), obtained on June 5.29 UT by P. Berlind with the F. L.
Whipple Observatory 1.5-m telescope (+ FAST), shows it to be a type-Ia
supernova around maximum light.  Cross-correlation with a library of
type-Ia-supernova spectra indicates that 2006cs is most similar to the
subluminous supernova 1999by (see Garnavich et al. 2004, Ap.J., 613, 1120)
at -3 days.  Adopting a recession velocity of 7026 km/s for the host galaxy
(from "The Updated Zwicky Catalog", http://tdc-www.harvard.edu/uzc/), the
maximum absorption in the Si II line (rest 635.5 nm) is blueshifted by
roughly 10500 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      superseded by text appearing later in the printed IAU Circulars.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 June 5                      (CBET 539)               Daniel W. E. Green