GCN Circular 7221
Subject
Transient 080109/SN 2008D: Spectroscopic Evolution
Event
Date
2008-01-25T19:26:17Z (19 years ago)
Edited On
2026-04-24T17:52:16Z (5 months ago)
From
Stefano Valenti at U di Ferrara,Italy <valenti@fe.infn.it>
Edited By
Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov>
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