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GRB 120308A, a long duration $\gamma-$ray burst detected by {\it Swift}, was distinguished by a highly-polarized early optical afterglow emission that strongly suggests an ordered magnetic field component in the emitting region. In this…

高能天体物理现象 · 物理学 2015-06-22 Shuai Zhang , Zhi-Ping Jin , Da-Ming Wei

Despite over 50 years of Gamma-Ray Burst (GRB) observations many open questions remain about their nature and the environments in which the emission takes place. Polarization measurements of the GRB prompt emission have long been theorized…

Gamma-ray bursts (GRBs) are the most powerful explosions in the universe and probe physics under extreme conditions. GRBs divide into two classes, of short and long duration, thought to originate from different types of progenitor systems.…

高能天体物理现象 · 物理学 2014-11-20 LAT Collaboration

Gamma-ray bursts (GRBs) are the most luminous explosions and can be detectable out to the edge of Universe. It has long been thought they can extend the Hubble diagram to very high redshifts. Several correlations between temporal or…

高能天体物理现象 · 物理学 2022-01-26 F. Y. Wang , J. P. Hu , G. Q. Zhang , Z. G. Dai

A long and intense gamma-ray burst (GRB) was detected by INTEGRAL on July 11 2012 with a duration of ~115s and fluence of 2.8x10^-4 erg cm^-2 in the 20 keV-8 MeV energy range. GRB 120711A was at z~1.405 and produced soft gamma-ray emission…

We present the IXPE observation of GRB 221009A which includes upper limits on the linear polarization degree of both prompt and afterglow emission in the soft X-ray energy band. GRB 221009A is an exceptionally bright gamma-ray burst (GRB)…

高能天体物理现象 · 物理学 2023-05-22 Michela Negro , Niccoló Di Lalla , Nicola Omodei , Péter Veres , Stefano Silvestri , Alberto Manfreda , Eric Burns , Luca Baldini , Enrico Costa , Steven R. Ehlert , Jamie A. Kennea , Ioannis Liodakis , Herman L. Marshall , Sandro Mereghetti , Riccardo Middei , Fabio Muleri , Stephen L. O'Dell , Oliver J. Roberts , Roger W. Romani , Carmelo Sgró , Alessandro Di Marco , Simonetta Puccetti , Masanobu Terashima , Andrea Tiengo , Domenico Viscolo , Fabio La Monaca , Luca Latronico , Giorgio Matt , Matteo Perri , Juri Poutanen , Ajay Ratheesh , Daniele Rogantini , Patrick Slane , Paolo Soffitta , Elina Lindfors , Kari Nilsson , Anni Kasikov , Alan P. Marscher , Fabrizio Tavecchio , Shuichi Gunji , Christian Malacaria , Alessandro Paggi , Yi-Jung Yang , Silvia Zane , Martin C. Weisskopf , Iván Agudo , Lucio A. Antonelli , Wayne H. Baumgartner , Ronaldo Bellazzini , Stefano Bianchi , Raffaella Bonino , Alessandro Brez , Niccol Bucciantini , Simone Castellano , Elisabetta Cavazzuti , Chien-Ting Chen , Alessandra De Rosa , Ettore Del Monte , Laura Di Gesu , Immacolata Donnarumma , Victor Doroshenko , Michal Dovciak , Teruaki Enoto , Matteo Bachetti , Stephen D. Bongiorno , Fiamma Capitanio , Stefano Ciprini , Yuri Evangelista , Sergio Fabiani , Riccardo Ferrazzoli , Javier A. Garcia , Kiyoshi Hayashida , Jeremy Heyl , Wataru Iwakiri , Svetlana G. Jorstad , Philip Kaaret , Vladimir Karas , Fabian Kislat , Takao Kitaguchi , Jeffery J. Kolodziejczak , Henric Krawczynski , Simone Maldera , Frédéric Marin , Andrea Marinucci , Ikuyuki Mitsuishi , Tsunefumi Mizuno , C. -Y. Ng , Chiara Oppedisano , Alessandro Papitto , George G. Pavlov , Abel L. Peirson , Melissa Pesce-Rollins , Pierre-Olivier Petrucci , Brian D. Ramsey , John Rankin , Gloria Spandre , Maura Pilia , Andrea Possenti , Douglas A. Swartz , Toru Tamagawa , Roberto Taverna , Yuzuru Tawara , Allyn F. Tennant , Nicholas E. Thomas , Francesco Tombesi , Alessio Trois , Sergey S. Tsygankov , Roberto Turolla , Jacco Vink , Kinwah Wu , Fei Xie

We report the detection of linear polarization in the radio afterglow of GRB 260310A, representing the first centimeter-wavelength polarization detection of a gamma-ray burst (GRB) afterglow and the first measurement of Faraday rotation in…

INTEGRAL has observed 47 long-duration GRBs (T_90 > 2s) and 1 short-duration GRB (T_90 < 2s) in five years of observation since October 2002. This work presents the properties of the prompt emission of GRB 070707, which is the first short…

天体物理学 · 物理学 2009-11-13 S. McGlynn , S. Foley , S. McBreen , L. Hanlon , R. O'Connor , A. Martin Carrillo , B. McBreen

The degree and the temporal evolution of linear polarization in the prompt and afterglow emission of gamma-ray bursts is a very robust diagnostic of some key features of gamma-ray bursts jets and their micro and macro physics. In this…

高能天体物理现象 · 物理学 2016-06-01 Davide Lazzati

The transition from prompt to the afterglow emission is one of the most exciting and least understood phases in gamma-ray bursts (GRBs). Correlations among optical, X-ray and gamma-ray emission in GRBs have been explored, to attempt to…

GRB 160821A is the third most energetic gamma ray burst observed by the {\it Fermi} gamma-ray space telescope. Based on the observations made by Cadmium Zinc Telluride Imager (CZTI) on board {\it AstroSat}, here we report the most…

A long Gamma-Ray Burst (GRB) was detected with the instruments on board the INTEGRAL satellite on January 31 2003. Although most of the GRB, which lasted $\sim$150 seconds, occurred during a satellite slew, the automatic software of the…

We report the earliest-ever detection of optical polarization from a GRB forward shock (GRB 141220A), measured $129.5-204.3\,$s after the burst using the multi-colour RINGO3 optical polarimeter on the 2-m fully autonomous robotic Liverpool…

高能天体物理现象 · 物理学 2021-06-22 N. Jordana-Mitjans , C. G. Mundell , R. J. Smith , C. Guidorzi , M. Marongiu , S. Kobayashi , A. Gomboc , M. Shrestha , I. A. Steele

Despite over 50 years of research, many open questions remain about the origin and nature of GRBs. Polarization measurements of the prompt emission of these extreme phenomena have long been thought to be the key to answering a range of…

The prompt emission mechanism of gamma-ray bursts (GRB) even after several decades remains a mystery. However, it is believed that correlations between observable GRB properties given their huge luminosity/radiated energy and redshift…

高能天体物理现象 · 物理学 2018-04-25 Maria Dainotti

While the dominant radiation mechanism gamma-ray bursts (GRBs) remains a question of debate, synchrotron emission is one of the foremost candidates to describe the multi-wavelength afterglow observations. As such, it is expected that GRBs…

A comprehensive understanding of Gamma Ray Bursts (GRBs) has been elusive due to the variety of questions surrounding the radiation mechanism at play in these events. Polarization measurements of GRBs can heavily constrain the relevant…

高能天体物理现象 · 物理学 2020-07-01 Tyler Parsotan , Diego Lopez-Camara , Davide Lazzati

Large-voltage and high-temperature plasma columns produced by pinch discharge can generate gamma-ray flashes with energy spectra and spectral evolution consistent with that observed in gamma-ray bursts (GRBs). The inverse Compton scattering…

天体物理学 · 物理学 2014-10-13 Mei Wu , Li Chen , Ti-pei Li

Aims. With the accumulation of polarization data in the gamma-ray burst (GRB) prompt phase, polarization models can be tested. Methods. We predicted the time-integrated polarizations of 37 GRBs with polarization observation. We used their…

高能天体物理现象 · 物理学 2023-02-22 R. Y. Guan , M. X. Lan

Gamma-ray bursts (GRBs) are the most electromagnetically luminous cosmic explosions. They are powered by collimated streams of plasma (jets) ejected by a newborn stellar-mass black hole or neutron star at relativistic velocities (near the…