Extending the plateau luminosity-duration anticorrelation

V. Mangano, Boris Sbarufatti, G. Stratta

Research output: Contribution to journalConference article

2 Citations (Scopus)

Abstract

X-ray light curves of Swift Gamma-ray Bursts (GRBs) often show a plateau phase between the initial steep decay and the standard afterglow decay. The plateau luminosity and the rest frame plateau end time are known to be anticorrelated. Our aim is to test whether GRBs that show no evidence of plateau can be considered as "very short plateau" cases matching the above correlation. We analyze a sample of 50 GRBs observed by Swift with known redshifts (z), estimating the end time of the plateau and the 0.3-10 keV luminosity at that time. We then consider the GRBs with known z and no evidence of plateau. We confirm the existence of the correlation and provide a unified picture showing that also those X-ray light curves with no evidence of plateau are consistent with it assuming that the start epoch of the long duration afterglow decay is a plateau duration upper limit. We suggest that this result may represent a clue for a unified interpretation of the anticorrelation in the framework of multicomponent models of X-ray emission from GRBs.

Original languageEnglish (US)
Pages (from-to)143-146
Number of pages4
JournalMemorie della Societa Astronomica Italiana, Supplementi - Journal of the Italian Astronomical Society, Supplement
Volume21
StatePublished - Jan 1 2012

Fingerprint

Gamma Rays
Gamma rays
Luminance
plateaus
luminosity
gamma ray bursts
X-Rays
X rays
Light
afterglows
light curve
decay
x rays
estimating
time measurement

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Radiology Nuclear Medicine and imaging
  • Astronomy and Astrophysics
  • Instrumentation
  • Atomic and Molecular Physics, and Optics

Cite this

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abstract = "X-ray light curves of Swift Gamma-ray Bursts (GRBs) often show a plateau phase between the initial steep decay and the standard afterglow decay. The plateau luminosity and the rest frame plateau end time are known to be anticorrelated. Our aim is to test whether GRBs that show no evidence of plateau can be considered as {"}very short plateau{"} cases matching the above correlation. We analyze a sample of 50 GRBs observed by Swift with known redshifts (z), estimating the end time of the plateau and the 0.3-10 keV luminosity at that time. We then consider the GRBs with known z and no evidence of plateau. We confirm the existence of the correlation and provide a unified picture showing that also those X-ray light curves with no evidence of plateau are consistent with it assuming that the start epoch of the long duration afterglow decay is a plateau duration upper limit. We suggest that this result may represent a clue for a unified interpretation of the anticorrelation in the framework of multicomponent models of X-ray emission from GRBs.",
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Extending the plateau luminosity-duration anticorrelation. / Mangano, V.; Sbarufatti, Boris; Stratta, G.

In: Memorie della Societa Astronomica Italiana, Supplementi - Journal of the Italian Astronomical Society, Supplement, Vol. 21, 01.01.2012, p. 143-146.

Research output: Contribution to journalConference article

TY - JOUR

T1 - Extending the plateau luminosity-duration anticorrelation

AU - Mangano, V.

AU - Sbarufatti, Boris

AU - Stratta, G.

PY - 2012/1/1

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N2 - X-ray light curves of Swift Gamma-ray Bursts (GRBs) often show a plateau phase between the initial steep decay and the standard afterglow decay. The plateau luminosity and the rest frame plateau end time are known to be anticorrelated. Our aim is to test whether GRBs that show no evidence of plateau can be considered as "very short plateau" cases matching the above correlation. We analyze a sample of 50 GRBs observed by Swift with known redshifts (z), estimating the end time of the plateau and the 0.3-10 keV luminosity at that time. We then consider the GRBs with known z and no evidence of plateau. We confirm the existence of the correlation and provide a unified picture showing that also those X-ray light curves with no evidence of plateau are consistent with it assuming that the start epoch of the long duration afterglow decay is a plateau duration upper limit. We suggest that this result may represent a clue for a unified interpretation of the anticorrelation in the framework of multicomponent models of X-ray emission from GRBs.

AB - X-ray light curves of Swift Gamma-ray Bursts (GRBs) often show a plateau phase between the initial steep decay and the standard afterglow decay. The plateau luminosity and the rest frame plateau end time are known to be anticorrelated. Our aim is to test whether GRBs that show no evidence of plateau can be considered as "very short plateau" cases matching the above correlation. We analyze a sample of 50 GRBs observed by Swift with known redshifts (z), estimating the end time of the plateau and the 0.3-10 keV luminosity at that time. We then consider the GRBs with known z and no evidence of plateau. We confirm the existence of the correlation and provide a unified picture showing that also those X-ray light curves with no evidence of plateau are consistent with it assuming that the start epoch of the long duration afterglow decay is a plateau duration upper limit. We suggest that this result may represent a clue for a unified interpretation of the anticorrelation in the framework of multicomponent models of X-ray emission from GRBs.

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M3 - Conference article

VL - 21

SP - 143

EP - 146

JO - Memorie della Societa Astronomica Italiana, Supplementi - Journal of the Italian Astronomical Society, Supplement

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SN - 1824-0178

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