GAMMA-RAY BURST PROMPT EMISSION

The cosmological gamma-ray burst (GRB) phenomenon is reviewed. The broad observational facts and empirical phenomenological relations of the GRB prompt emission and afterglow are outlined. A well-tested, successful fireball shock model is introduced in a pedagogical manner. Several important uncertainties in the current understanding of the phenomenon are reviewed, and prospects of how future experiments and extensive observational and theoretical efforts may address these problems are discussed.

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The Theory of Spectral Evolution of the Gamma‐Ray Burst Prompt Emission

The Astrophysical Journal ◽

10.1086/498697 ◽

2006 ◽

Vol 637 (2) ◽

pp. 869-872 ◽

Cited By ~ 68

Author(s):

Mikhail V. Medvedev

Keyword(s):

Gamma Ray ◽

Spectral Evolution ◽

Gamma Ray Burst ◽

Prompt Emission

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Gamma Ray Burst Prompt Emission Variability in Synchrotron and Synchrotron Self-Compton Lightcurves

10.1063/1.3621746 ◽

2011 ◽

Cited By ~ 2

Author(s):

Lekshmi Resmi ◽

Bing Zhang ◽

J. E. McEnery ◽

J. L. Racusin ◽

N. Gehrels

Keyword(s):

Gamma Ray ◽

Gamma Ray Burst ◽

Prompt Emission

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Gamma-Ray Burst Prompt Correlations

Advances in Astronomy ◽

10.1155/2018/4969503 ◽

2018 ◽

Vol 2018 ◽

pp. 1-31 ◽

Cited By ~ 12

Author(s):

M. G. Dainotti ◽

R. Del Vecchio ◽

M. Tarnopolski

Keyword(s):

Gamma Ray ◽

Theoretical Models ◽

Gamma Ray Bursts ◽

Gamma Ray Burst ◽

The Past ◽

Two Parameter ◽

Prompt Emission

The mechanism responsible for the prompt emission of gamma-ray bursts (GRBs) is still a debated issue. The prompt phase-related GRB correlations can allow discriminating among the most plausible theoretical models explaining this emission. We present an overview of the observational two-parameter correlations, their physical interpretations, and their use as redshift estimators and possibly as cosmological tools. The nowadays challenge is to make GRBs, the farthest stellar-scaled objects observed (up to redshift z=9.4), standard candles through well established and robust correlations. However, GRBs spanning several orders of magnitude in their energetics are far from being standard candles. We describe the advances in the prompt correlation research in the past decades, with particular focus paid to the discoveries in the last 20 years.

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Some Recent Developments in γ-ray Burst Afterglow and Prompt Emission Models

Symposium - International Astronomical Union ◽

10.1017/s0074180900194641 ◽

2003 ◽

Vol 214 ◽

pp. 311-320

Author(s):

Bing Zhang ◽

Peter Mészáros ◽

Junfeng Wang

Keyword(s):

Gamma Ray ◽

Current Data ◽

Spectral Domain ◽

Gamma Ray Burst ◽

Temporal Domain ◽

Global View ◽

Recent Developments ◽

Emission Models ◽

Γ Ray ◽

Prompt Emission

Extensive observational campaigns of afterglow hunting have greatly enriched our understanding of the gamma-ray burst (GRB) phenomenon. Efforts have been made recently to explore some afterglow properties or signatures that will be tested by the on-going or the future observational campaigns yet come. These include the properties of GRB early afterglows in the temporal domain; the GeV-TeV afterglow signatures in the spectral domain; as well as a global view about the GRB universal structured jet configuration. These recent efforts are reviewed. Within the standard cosmological fireball model, the very model(s) responsible for the GRB prompt emission is (are) not identified. These models are critically reviewed and confronted with the current data.

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