[vsnet-grb-info 5558] Transient 080109/SN 2008D: Spectroscopic Evolution

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  7221
SUBJECT: Transient 080109/SN 2008D: Spectroscopic Evolution
DATE:    08/01/25 19:26:17 GMT
FROM:    Stefano Valenti at U di Ferrara,Italy  <valenti at fe.infn.it>

S.   Valenti   (Universita'  degli  studi  di   Ferrara),  V.   D'Elia
(INAF-Ossevatorio    Astronomico   di    Roma),   M.     Della   Valle
(INAF-Osservatorio Astronomico di Capodimonte, Napoli), S.     Benetti
(INAF-Osservatorio Astronomico di  Padova), G.  Chincarini (Universita
degli  Studi  di  Milano  Bicocca),  P.A.  Mazzali  (INAF-Osservatorio
Astronomico   di  Trieste)   and   L.  A.  Antonelli (INAF-Ossevatorio
Astronomico di Roma) and behalf of a larger collaboration report:

We obtained an optical spectrum of SN2008D (crf. Li & Filippenko, CBET
1202; Soderberg et  al., GCN 7165; Malesani et  al., GCN 7169; Valenti
et al., GCN 7171; Blondin et  al., CBET 1205, see also GCN 7160-7168).
The spectrum (range 350-1000 nm) taken on Jan 25.21 with the VLT+FORS2
dereddened by an E(B-V)= 0.5 is identical to the spectrum of SN 1999ex
-1 day  before maximum (Hamuy M. et  al.,2002, AJ,124,417H), dereddend
by E(B-V)=  0.3 (Stritzinger, M.  AJ 2002,124,2100).   We confirm that
the spectrum of SN 2008D in now more similar to that of a normal SN Ib
as  reported by Modjaz  et al  (GCN7212).  A  comparison is  shown at:
http://www.eso.org/~svalenti/homepage/comparison_99ex_08D_2.jpg