[AAVSO-HEN] Spectroscopic classification of SN 2008D (Transient in NGC 2770)

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TITLE:   GCN CIRCULAR
NUMBER:  7171
SUBJECT: Spectroscopic classification of SN 2008D (Transient in NGC 2770)
DATE:    08/01/11 22:07:31 GMT
FROM:    Stefano Valenti at U di Ferrara,Italy  <valenti at fe.infn.it>

S.  Valenti  (Universita'  di  Ferrara);  D.   Fugazza,  E.   Maiorano
(Istituto Nazionale di Astrofisica - INAF - Osservatorio Astronomico di
Bologna); V.  D'Elia, L.A.  Antonelli (INAF-Ossevatorio Astronomico di
Roma);   S.    Covino   (INAF-Osservatorio  Astronomico   di   Brera);
A. Magazzu' and  N.  Pinilla-Alonso (INAF-Telescopio Nazionele Galileo
(TNG)); M.  Della Valle (INAF-Osservatorio Astrofisico di Arcetri); G.
Chincarini  (Universita' degli  Studi  di Milano  Bicocca); E.   Pian,
P.A.    Mazzali    (INAF-Osservatorio    Astronomico   di    Trieste);
A.  Harutyunyan, S. Benetti  (INAF-Osservatorio Astronomico di Padova)
and behalf of the CIBO collaboration report:

The preliminary reduction of a spectrum
of SN 2008D (Transient in NGC 2770) taken with TNG+LRS
(range 350 - 780 nm) on Jan 11.1 resembles
that of the energetic type Ic SN 2006aj 3 days after explosion (Pian et
al, 2006, Nature 442 1011). The SiII-635.5nm  feature shows  an  higher
expansion velocity  than in  SN  2006aj.  The  bluer  bumbs seen  in SN
2006aj spectrum, centered at  about 440  and 500  nm, are not  yet well
developed, also
suggesting an higher expansion velocity.