Eearly spectroscopic identification of SN 2008D
. (2009) Eearly spectroscopic identification of SN 2008D. Astrophysical Journal Letters, Vol.692 (No.2). L84-L87. ISSN 2041-8205 Full text not available from this repository.
Official URL: http://dx.doi.org/10.1088/0004-637X/692/2/L84
SN 2008D was discovered while following up an unusually bright X-ray transient (XT) in the nearby spiral galaxy NGC 2770. We present early optical spectra ( obtained 1.75 days after the XT) which allowed the first identification of the object as a supernova ( SN) at redshift z = 0.007. These spectra were acquired during the initial declining phase of the light curve, likely produced in the stellar envelope cooling after shock breakout, and rarely observed. They exhibit a rather flat spectral energy distribution with broad undulations, and a strong, W-shaped feature with minima at 3980 and 4190 angstrom ( rest frame). We also present extensive spectroscopy and photometry of the SN during the subsequent photospheric phase. Unlike SNe associated with gamma-ray bursts, SN 2008D displayed prominent He features and is therefore of Type Ib.
|Item Type:||Journal Article|
|Subjects:||Q Science > QB Astronomy|
|Divisions:||Faculty of Science > Physics|
|Journal or Publication Title:||Astrophysical Journal Letters|
|Publisher:||IOP Publishing Ltd|
|Date:||20 February 2009|
|Number of Pages:||4|
|Access rights to Published version:||Restricted or Subscription Access|
|Funder:||DNRF, Spanish research programs, EU, Icelandic Research Fund|
|Grant number:||AYA2004-01515, ESP2005-07714-C03-03, MEIF-CT2006-041363, PERG03-GA-2008-226653|
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