[IAUC] CBET 1610: 20081208 : SUPERNOVA 2008hy IN IC 334

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                                                  Electronic Telegram No. 1610
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 2008hy IN IC 334
     M. Dennefeld, Institut d'Astrophysique de Paris and University of
Paris 6; C. Adami and D. Russeil, Laboratoire d'Astrophysique de Marseille;
I. Agnoletto, Universita di Padova; and J. Sollerman, Stockholm Observatory,
report that two spectra of 2008hy (cf. CBET 1608), obtained on Dec. 7.948
and 7.962 UT with the Carelec spectrograph at the 1.93-m telescope at Haute
Provence Observatory (range 369-732 nm, resolution 0.7 nm), show it to be a
normal type-Ia supernova a few days past maximum.  The best fit to this
spectrum found by GELATO (Harutyunyan et al. 2008, http://lanl.arxiv.org/
abs/0804.1939) is with a spectrum of SN 1990N at 7 days after maximum.
Adopting a recession velocity of 2536 km/s for the host galaxy (de
Vaucouleurs et al. 1991, Third Reference Catalogue of Bright Galaxies;
Huchra et al. 1999, Ap.J. Suppl. 121, 287), the expansion velocity deduced
from the Si II 635.5-nm absorption is about 11000 km/s.
     M. Yamanaka, K. Sakimoto, and K. S. Kawabata, Hiroshima University;
report that they obtained optical spectra (range 500-900 nm) of 2008hy on
Dec. 7.8 UT with the KANATA 1.5-m telescope (+ TRISPEC) at Higashi-Hiroshima
Astronomical Observatory.  SN 2008hy exhibits strong Si II 635.5-nm and Si
II 597.2-nm absorption features that are blueshifted by about 12000 km/s.
The spectrum shows the W-feature profile of sulfur at 520-550 nm and the Fe
II multiplet absorption at 460-500 nm, and the O I 777.4-nm feature is seen
at 750 nm.  The spectrum is similar to that of SN 2003du at around maximum,
which suggests that 2008hy would be normal type-Ia supernova at maximum phase.


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                         (C) Copyright 2008 CBAT
2008 December 8                  (CBET 1610)              Daniel W. E. Green