The Late‐Time Light Curve of SN 1998bw Associated with GRB 980425
نویسندگان
چکیده
منابع مشابه
RADIO SUPERNOVA SN 1998bw AND ITS RELATION TO GRB 980425
SN 1998bw is an unusual Type Ic supernova that may be associated with the γ-ray burst GRB 980425. We use a synchrotron self-absorption model for its radio emission to deduce that the synchrotron-emitting gas is expanding into a circumstellar medium of approximately r−2 density profile, at a speed comparable to the speed of light. We assume that the efficiencies of production of relativistic ele...
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At z = 0.1055, the gamma-ray burst GRB 031203 is one of the two nearest GRBs known. Using observations from the Very Large Array (VLA) and Chandra X-ray Observatory we derive sub-arcsecond localizations of the radio and X-ray afterglow of this GRB. We present near-infrared observations of the supernova SN 2003lw, which exploded in the host galaxy of the GRB 031203. Our deep, high resolution Mag...
متن کاملThe Metamorphosis of Sn 1998bw
We present and discuss the photometric and spectroscopic evolution of the peculiar SN 1998bw, associated with GRB 980425, through an analysis of optical and near IR data collected at ESO-La Silla. The spectroscopic data, spanning the period from day −9 to day +376 (relative to B maximum), have shown that this SN was unprecedented, although somewhat similar to SN 1997ef. Maximum expansion veloci...
متن کاملThe galaxies in the field of the nearby GRB 980425 / SN 1998 bw
We present spectroscopic observations of ESO 184−G82, the host galaxy of GRB 980425/SN 1998bw, and six galaxies in its field. A host redshift of z = 0.0087± 0.0006 is derived, consistent with that measured by Tinney et al. (1998). Redshifts are obtained for the six surrounding galaxies observed. Three of these galaxies lie within 11 Mpc of each other, confirming the suggestion that some of thes...
متن کاملChandra Observations of the X - ray Environs of SN 1998 bw / GRB 980425
We report X-ray studies of the environs of SN 1998bw and GRB 980425 using the Chandra X-Ray Observatory 1281 days after the GRB. Eight X-ray point sources were localized, three and five each in the original error boxes S1 and S2 assigned for variable X-ray counterparts to the GRB by BeppoSAX. The sum of the discrete X-ray sources plus continuous emission in S2 observed by CXO on day 1281 is wit...
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ژورنال
عنوان ژورنال: Publications of the Astronomical Society of the Pacific
سال: 1999
ISSN: 0004-6280,1538-3873
DOI: 10.1086/316404