Swift late GRB emission and GLAST

Nathaniel Butler

doi:10.1063/1.2757278

Swift late GRB emission and GLAST

Nathaniel Butler

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Scopus citations

Abstract

Recent observations of early X-ray afterglows of GRBs by the Swift satellite - prior to t ∼ 10³s but well after the end of the burst - show most GRBs to be followed by highly time and energy variable emission. This was unexpected prior to Swift and physical mechanisms remain largely mysterious. The spectra exhibit a strong hard-to-soft evolution which tracks the flux, consistent with a well-established hardness intensity correlation for the prompt Gamma-ray emission. The light curves show dramatic flares or rapid logarithmic time decays. In the simplest interpretation, this emission is GRB-like and indicates a long lived energy source with the possibility of interacting shells of widely varying bulk Lorentz factor. We review the phenomenology in order to ascertain how GLAST observations of this early emission, either detected directly or through the detection of inverse-Compton emission, can help to rule on possible models.

Original language	English (US)
Title of host publication	First GLAST Symposium
Pages	103-105
Number of pages	3
DOIs	https://doi.org/10.1063/1.2757278
State	Published - Dec 1 2007
Externally published	Yes
Event	1st Gamma-ray Large Area Space Telescope Symposium, GLAST - Stanford, CA, United States Duration: Feb 5 2007 → Feb 8 2007

Publication series

Name	AIP Conference Proceedings
Volume	921
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Other

Other	1st Gamma-ray Large Area Space Telescope Symposium, GLAST
Country/Territory	United States
City	Stanford, CA
Period	2/5/07 → 2/8/07

Keywords

Gamma rays: Bursts
X-rays: General

ASJC Scopus subject areas

General Physics and Astronomy

Access to Document

10.1063/1.2757278

Cite this

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title = "Swift late GRB emission and GLAST",

abstract = "Recent observations of early X-ray afterglows of GRBs by the Swift satellite - prior to t ∼ 103s but well after the end of the burst - show most GRBs to be followed by highly time and energy variable emission. This was unexpected prior to Swift and physical mechanisms remain largely mysterious. The spectra exhibit a strong hard-to-soft evolution which tracks the flux, consistent with a well-established hardness intensity correlation for the prompt Gamma-ray emission. The light curves show dramatic flares or rapid logarithmic time decays. In the simplest interpretation, this emission is GRB-like and indicates a long lived energy source with the possibility of interacting shells of widely varying bulk Lorentz factor. We review the phenomenology in order to ascertain how GLAST observations of this early emission, either detected directly or through the detection of inverse-Compton emission, can help to rule on possible models.",

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author = "Nathaniel Butler",

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series = "AIP Conference Proceedings",

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note = "1st Gamma-ray Large Area Space Telescope Symposium, GLAST ; Conference date: 05-02-2007 Through 08-02-2007",

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PY - 2007/12/1

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N2 - Recent observations of early X-ray afterglows of GRBs by the Swift satellite - prior to t ∼ 103s but well after the end of the burst - show most GRBs to be followed by highly time and energy variable emission. This was unexpected prior to Swift and physical mechanisms remain largely mysterious. The spectra exhibit a strong hard-to-soft evolution which tracks the flux, consistent with a well-established hardness intensity correlation for the prompt Gamma-ray emission. The light curves show dramatic flares or rapid logarithmic time decays. In the simplest interpretation, this emission is GRB-like and indicates a long lived energy source with the possibility of interacting shells of widely varying bulk Lorentz factor. We review the phenomenology in order to ascertain how GLAST observations of this early emission, either detected directly or through the detection of inverse-Compton emission, can help to rule on possible models.

AB - Recent observations of early X-ray afterglows of GRBs by the Swift satellite - prior to t ∼ 103s but well after the end of the burst - show most GRBs to be followed by highly time and energy variable emission. This was unexpected prior to Swift and physical mechanisms remain largely mysterious. The spectra exhibit a strong hard-to-soft evolution which tracks the flux, consistent with a well-established hardness intensity correlation for the prompt Gamma-ray emission. The light curves show dramatic flares or rapid logarithmic time decays. In the simplest interpretation, this emission is GRB-like and indicates a long lived energy source with the possibility of interacting shells of widely varying bulk Lorentz factor. We review the phenomenology in order to ascertain how GLAST observations of this early emission, either detected directly or through the detection of inverse-Compton emission, can help to rule on possible models.

KW - Gamma rays: Bursts

KW - X-rays: General

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Swift late GRB emission and GLAST

Abstract

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Keywords

ASJC Scopus subject areas

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