EARLY SPECTROSCOPIC IDENTIFICATION OF SN 2008D
نویسندگان
چکیده
منابع مشابه
Vlbi Observations of Sn 2008d
We report on two epochs of VLBI observations of the Type Ib/c supernova SN 2008D, which was associated with the X-ray outburst XRF 080109, At our first epoch, at t = 30 days after the explosion, we observed at 22 and 8.4 GHz, and at our second, at t = 133 days, at 8.4 and 5.0 GHz. The VLBI observations allow us to accurately measure the source’s size and position at each epoch, and thus constra...
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We analyze the hitherto available space-based X-ray data as well as ground-based optical data of the X-ray transient 080109/SN 2008D. From the data we suggest that (i) The initial transient (800 sec) is attributed to the reverse shock emission of a mildly relativistic (Γ ∼ a few) outflow stalled by the dense stellar wind. (ii) The subsequent X-ray afterglow (2 × 10 4 sec) can be ascribed to the...
متن کاملSHOCK BREAKOUT EMISSION FROM A TYPE Ib/c SUPERNOVA: XRF 080109/SN 2008D
The X-ray flash 080109, associated with SN 2008D, can be attributed to the shock breakout emission from a normal Type Ib/c supernova. If the observed emission is interpreted as blackbody emission, the temperature and radiated energy are close to expectations, considering that scattering dominates absorption processes so that spectrum formation occurs deep within the photosphere. The Xray emissi...
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We present optical spectroscopic and photometric observations of supernova (SN) 2008D, associated with the luminous X-ray transient 080109, at > 300 days after the explosion (nebular phases). We also give flux measurements of emission lines from the H ii region at the site of the SN, and estimates of the local metallicity. The brightness of the SN at nebular phases is consistent with the predic...
متن کاملThe early spectral evolution of SN 2004dt
Aims. We study the optical spectroscopic properties of Type Ia Supernova (SN Ia) 2004dt, focusing our attention on the early epochs. Methods. Observation triggered soon after the SN 2004dt discovery allowed us to obtain a spectrophotometric coverage from day −10 to almost one year (∼353 days) after the B band maximum. Observations carried out on an almost daily basis allowed us a good sampling ...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2009
ISSN: 0004-637X,1538-4357
DOI: 10.1088/0004-637x/692/2/l84