Holland, Stephen T. 2011 GRB 081029的余辉观测

主要内容:


精彩摘抄:

文章信息:

· Find Similar Abstracts (with default settings below)

· Electronic Refereed Journal Article (HTML)

· Full Refereed Journal Article (PDF/Postscript)

· arXiv e-print (arXiv:1111.6484)

· References in the article

· Also-Read Articles (Reads History)

·

· Translate This Page

Title:		GRB 081029: A Gamma-Ray Burst with a Multi-component Afterglow
Authors:		Holland, Stephen T.; De Pasquale, Massimiliano; Mao, Jirong;
Affiliation:		AA(Astrophysics Science Division, Code 660.1,
Publication:		The Astrophysical Journal, Volume 745, Issue 1, article id. 41 (2012). (ApJ Homepage)
Publication Date:		01/2012
Origin:		IOP
Astronomy Keywords:		gamma-ray burst: general, gamma-ray burst: individual: GRB 081029
DOI:		10.1088/0004-637X/745/1/41
Bibliographic Code:		2012ApJ...745...41H

Abstract

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 UltraViolet/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 ~100000 s after the BAT trigger. Our data cover a wide energy range from 10 keV to 0.77 eV (1.24 Å-16000 Å). The X-ray afterglow shows a shallow initial decay followed by a rapid decay starting at about 18000 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 modeling to fully understand them.

---

Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)