[IAUC] CBET 651: 20060928 : SUPERNOVA 2006gz IN IC 1277

[IAUC mailing list]

                                                  Electronic Telegram No. 651
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 2006gz IN IC 1277
     J. L. Prieto and D. Depoy, Ohio State University; and P.
Garnavich, University of Notre Dame, report that spectra of 2006gz
(cf. IAUC 8754) were obtained with the Hiltner 2.4-m telescope (+
CCDS spectrograph) at MDM Observatory on Sept. 28.1 UT.  The reduced
spectra show a blue continuum with broad absorption features,
consistent with a type-Ia supernova.  Si II (635 nm) and S II (547,
563 nm) are clearly present, but the widths of the S II features are
narrow compared to that seen in spectra of a normal type-Ia supernova,
and the Si II feature shows an extrordinay double absorption.  Assuming
a recession velocity for the host galaxy of 8398 km/s (Haynes and
Giovanelli 1997, A.J. 113, 1197), the minima of the Si II absorptions
occur at 15000 and 6500 km/s.  Further observations of this unusual
event are urged.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2006 CBAT
2006 September 28                (CBET 651)               Daniel W. E. Green