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Evidence of the exponential decay emission in the swift gamma-ray bursts
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Swindell, S. Sato, G. Hill, J. E. Sakamoto, T. Yamazaki, R. Takami, K. Krimm, H. A. Osborne, J. P. |
| Copyright Year | 2007 |
| Description | We present a systematic study of the steep decay emission of gamma-ray bursts (GRBs) observed by the Swift X-Ray Telescope (XRT). In contrast to the analysis in recent literature, instead of extrapolating the data of Burst Alert Telescope (BAT) down into the XRT energy range, we extrapolated the XRT data up to the BAT energy range, 15-25 keV, to produce the BAT and XRT composite light curve. Based on our composite light curve fitting, we have confirmed the existence of an exponential decay component which smoothly connects the BAT prompt data to the XRT steep decay for several GRBs. We also find that the XRT steep decay for some of the bursts can be well fitted by a combination of a power-law with an exponential decay model. We discuss that this exponential component may be the emission from an external shock and a sign of the deceleration of the outflow during the prompt phase. |
| File Size | 44963799 |
| Page Count | 30 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20070023462 |
| Archival Resource Key | ark:/13960/t4wh7jh5j |
| Language | English |
| Publisher Date | 2007-01-02 |
| Access Restriction | Open |
| Subject Keyword | Astronomy Swift Observatory Extrapolation Afterglows Spectrum Analysis Particle Decay Light Curve Models Curve Fitting Gamma Ray Bursts 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 |
