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Grb 081029: a gamma-ray burst with a multi-component afterglow
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Holland, Stephen T. Schady, Patricia D'Avanzo, Paolo D'Elia, Valerio Sakamoto, Takanori Jin, Zhi-Ping Mao, Jirong Pandey, Shashi Bhushan De Pasquale, Massimiliano Covino, Stefano Antonelli, Angelo Cobb, Bethany E. Ohincarini, Guido Fiore, Fabrizio Fan, Yi-Zhong |
| Copyright Year | 2012 |
| Description | We present an analysis of the unusual optical light curve of the gamma-ray burst GRB 081029, a long-soft burst with a redshift of z = 3.8479. We combine X-ray and optical observations from the Swift X-Ray Telescope and the Swift Ultra Violet/Optical Telescope with ground-based optical and infrared data obtained using the REM, ROTSE, and CTIO 1.3-m telescopes to construct a detailed data set extending from 86 s to approx.100,000 s after the BAT trigger. Our data covers a wide energy range, from 10 keV to 0.77 eV (1.24 A to 16000 A). The X-ray afterglow shows a shallow initial decay followed by a rapid decay starting at about 18,000 s. The optical and infrared afterglow, however, shows an uncharacteristic rise at about 3000 s that does not correspond to any feature in the X-ray light curve. Our data are not consistent with synchrotron radiation from a jet interacting with an external medium, a two-component jet, or continuous energy injection from the central engine. We find that the optical light curves can be broadly explained by a collision between two ejecta shells within a two-component jet. A growing number of gamma-ray burst afterglows are consistent with complex jets, which suggests that some (or all) gamma-ray burst jets are complex and will require detailed modelling to fully understand them.injection |
| File Size | 6961432 |
| Page Count | 29 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20120016039 |
| Archival Resource Key | ark:/13960/t37132b7z |
| Language | English |
| Publisher Date | 2012-11-28 |
| Access Restriction | Open |
| Subject Keyword | Astrophysics Ejecta Afterglows Visual Observation Telescopes Light Curve Gamma Ray Bursts X Ray Optics Synchrotron Radiation X Ray Telescopes Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
