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GRB 080913 AT REDSHIFT 6.7
We report on the detection by Swift of GRB 080913, and subsequent optical/near-infrared follow-up observations by GROND, which led to the discovery of its optical/NIR afterglow and the recognition of…
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JET BREAKS AND ENERGETICS OF Swift GAMMA-RAY BURST X-RAY AFTERGLOWS
We present a systematic temporal and spectral study of all Swift-X-ray Telescope observations of gamma-ray burst (GRB) afterglows discovered between 2005 January and 2007 December. After constructing…
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Swift Observations of GRB 070110: An Extraordinary X-Ray Afterglow Powered by the Central Engine
We present a detailed analysis of Swift multiwavelength observations of GRB 070110 and its remarkable afterglow. The early X-ray light curve, interpreted as the tail of the prompt emission, displays…
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A Comprehensive Analysis of Swift XRT Data. II. Diverse Physical Origins of the Shallow Decay Segment
The origin of the shallow decay segment in Swift XRT light curves remains a puzzle. We analyze the properties of this segment with a sample of 53 long Swift GRBs detected before 2007 February. We…
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Ultrahigh-energy photons up to 1.4 petaelectronvolts from 12 γ-ray Galactic sources.
TLDR
The detection of more than 530 photons at energies above 100 teraelectronvolts and up to 1.4 PeV from 12 ultrahigh-energy γ-ray sources with a statistical significance greater than seven standard deviations is reported.
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HOW BAD OR GOOD ARE THE EXTERNAL FORWARD SHOCK AFTERGLOW MODELS OF GAMMA-RAY BURSTS?
TLDR
The external forward shock models have been the standard paradigm to interpret the broadband afterglow data of gamma-ray bursts (GRBs) and one prediction of the models is that some afterglowing temporal fluctuations are positive and some are negative.
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Making a Short Gamma-Ray Burst from a Long One: Implications for the Nature of GRB 060614
The absence of a supernova accompanying the nearby long GRB 060614 poses a great puzzle about the progenitor of this event and challenges the current GRB classification scheme. This burst displays a…
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The masses of central supermassive black holes and the variability time-scales in gamma-ray loud blazars
The central supermassive black hole (SMBH) masses and variability time-scales of completed EGRET positive gamma-ray blazars loud were investigated. We generalized the Elliot-Shapiro relation to the…
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A COMPREHENSIVE ANALYSIS OF FERMI GAMMA-RAY BURST DATA. I. SPECTRAL COMPONENTS AND THE POSSIBLE PHYSICAL ORIGINS OF LAT/GBM GRBs
We present a systematic analysis of the spectral and temporal properties of 17 gamma-ray bursts (GRBs) codetected by the Gamma-ray Burst Monitor (GBM) and the Large Area Telescope (LAT) onboard the…
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A Comprehensive Analysis of Swift XRT Data. III. Jet Break Candidates in X-Ray and Optical Afterglow Light Curves
The Swift XRT data for 179 GRBs (050124 to 070129) and the optical afterglow data for 57 pre- and post-Swift GRBs are analyzed to explore whether the observed breaks in the afterglow light curves can…
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