Emery, SWK;
Page, MJ;
Breeveld, AA;
Brown, PJ;
Kuin, NPM;
Oates, SR;
De Pasquale, M;
(2019)
The early optical afterglow and non-thermal components of GRB 060218.
Monthly Notices of the Royal Astronomical Society
, 484
(4)
pp. 5484-5498.
10.1093/mnras/stz373.
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Abstract
We re-examine the UV/optical and X-ray observations of GRB 060218 during the prompt and afterglow phases. We present evidence in the UV/optical spectra that there is a synchrotron component contributing to the observed flux in the initial 1350 s. This result suggests that GRB 060218 is produced from a low-luminosity jet, which penetrates through its progenitor envelope after core collapse. The jet interacts with the surrounding medium to generate the UV/optical external shock synchrotron emission. After 1350 s, the thermal radiation in the UV/optical and X-ray becomes the dominant contribution to the observed flux. The UV/optical and X-ray spectra at 1350–10 000 s can be fitted with a spherically outflowing blackbody model, with an additional power-law component to the model at X-ray energies.
| Type: | Article |
|---|---|
| Title: | The early optical afterglow and non-thermal components of GRB 060218 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/stz373 |
| Publisher version: | https://doi.org/10.1093/mnras/stz373 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Physical Sciences, Astronomy & Astrophysics, radiation mechanisms: non-thermal, radiation mechanisms: thermal, gamma-ray burst: general, gamma-ray burst: individual: GRB 060218, GAMMA-RAY BURST, SHOCK BREAKOUT, NEUTRON-STAR, SUPERNOVA, SPECTRA, SWIFT, LUMINOSITY, GRB-060218, POLARIZATION, CALIBRATION |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10072445 |
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