Gamma-Ray Bursts in the Swift Era
TL;DR: In this article, the authors review the rapid observational and theoretical progress in this dynamical research field during the first two-year of the Swift mission, focusing on how observational breakthroughs have revolutionized our understanding of the physical origins of GRBs.
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Abstract: Since the successful launch of NASA's dedicated gamma-ray burst (GRB) mission, Swift, the study of cosmological GRBs has entered a new era. Here I review the rapid observational and theoretical progress in this dynamical research field during the first two-year of the Swift mission, focusing on how observational breakthroughs have revolutionized our understanding of the physical origins of GRBs. Besides summarizing how Swift helps to solve some pre-Swift mysteries, I also list some outstanding problems raised by the Swift observations. An outlook of GRB science in the future, especially in the GLAST era, is briefly discussed.
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Methods and results of an automatic analysis of a complete sample of Swift-XRT observations of GRBs
Phil Evans,A. P. Beardmore,K. L. Page,J. P. Osborne,P. T. O'Brien,Richard Willingale,R. L. C. Starling,David N. Burrows,Olivier Godet,L. Vetere,Judith Racusin,M. R. Goad,Klaas Wiersema,Lorella Angelini,Milvia Capalbi,G. Chincarini,G. Chincarini,Neil Gehrels,J. A. Kennea,Raffaella Margutti,Raffaella Margutti,D. C. Morris,D. C. Morris,C. J. Mountford,C. Pagani,M. Perri,P. Romano,Nial R. Tanvir +27 more
TL;DR: A homogeneous X-rays analysis of all 318 gamma-ray bursts detected by the X-ray telescope (XRT) on the Swift satellite up to 2008 July 23 is presented; this represents the largest sample ofX-ray GRB data published to date.
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The physics of gamma-ray bursts & relativistic jets
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TL;DR: A comprehensive review of major developments in our understanding of gamma-ray bursts, with particular focus on the discoveries made within the last fifteen years when their true nature was uncovered, can be found in this paper.
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The strongest cosmic magnets: soft gamma-ray repeaters and anomalous X-ray pulsars
Abstract: Two classes of X-ray pulsars, the anomalous X-ray pulsars and the soft gamma-ray repeaters, have been recognized in the last decade as the most promising candidates for being magnetars: isolated neutron stars powered by magnetic energy. I review the observational properties of these objects, focussing on the most recent results, and their interpretation in the magnetar model. Alternative explanations, in particular those based on accretion from residual disks, are also considered. The possible relations between these sources and other classes of neutron stars and astrophysical objects are also discussed.
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References
Afterglow Emission from Highly Collimated Jets with Flat Electron Spectra: Application to the GRB 010222 Case?
Z. G. Dai,K. S. Cheng +1 more
TL;DR: In this article, the authors derived light curves of the afterglow emission from highly collimated jets if the power-law index (p )o f the electron energy distribution is above 1 but below 2.
General Relativistic Magnetohydrodynamic Simulations of Collapsars
TL;DR: In this article, a 2.5-dimensional general relativistic magnetohydrodynamic (MHD) simulation of the gravitational collapse of a magnetized rotating massive star as a model of gamma-ray bursts (GRBs) was performed.
Constraints on models for TeV gamma rays from gamma-ray bursts
TL;DR: In this article, the authors explore several models which might be proposed to explain recent possible detections of high-energy (TeV) gamma rays in association with low-energy gamma-ray bursts (GRBs).
Optical Flash of GRB 990123: Constraints on the Physical Parameters of the Reverse Shock
TL;DR: The optical flash accompanying GRB 990123 is believed to be powered by the reverse shock of a thin shell as mentioned in this paper, and the theoretical peak flux of the optical flash accounts for only 3◊10 4 of the observed.
The Expected Redshift Distribution of Gamma-Ray Bursts
Volker Bromm,Abraham Loeb +1 more
TL;DR: In this paper, the authors predict the redshift distribution of gamma-ray bursts (GRBs), assuming that they trace the cosmic star formation history, and they find that a fraction 50% of all GRBs on the sky originate at a redshift z 5, even though the fraction of the total stellar mass formed by z ~ 5 is only ~15%.
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