Related papers: GRB 060117: Reverse + forward shock solution

Reverse Shock Emission as a Probe of GRB Ejecta

We calculate the reverse shock (RS) synchrotron emission in the optical and the radio wavelength bands from electron-positron pair enriched gamma-ray burst ejecta with the goal of determining the pair content of GRBs using early time…

Astrophysics · Physics 2009-11-13 E. McMahon , P. Kumar , T. Piran

GROND coverage of the main peak of Gamma-Ray Burst 130925A

Prompt or early optical emission in gamma-ray bursts is notoriously difficult to measure, and observations of the dozen cases show a large variety of properties. Yet, such early emission promises to help us achieve a better understanding of…

High Energy Astrophysical Phenomena · Physics 2014-09-05 J. Greiner , H. -F. Yu , T. Krühler , D. D. Frederiks , A. Beloborodov , P. N. Bhat , J. Bolmer , H. van Eerten , R. L. Aptekar , J. Elliott , S. V. Golenetskii , J. F. Graham , K. Hurley , D. A. Kann , S. Klose , A. Nicuesa Guelbenzu , A. Rau , P. Schady , S. Schmidl , V. Sudilovsky , D. S. Svinkin , M. Tanga , M. V. Ulanov , K. Varela , A. von Kienlin , X. -L. Zhang

We present an analysis of time-resolved optical emissions observed from the gamma-ray burst GRB 081126 during the prompt phase. The analysis employed time-resolved photometry using optical data obtained by the TAROT telescope, using BAT…

Cosmology and Nongalactic Astrophysics · Physics 2011-02-11 Alain Klotz , B. Gendre , J. L. Atteia , Michel Boër , David M. Coward , Alan C. Imerito

GRB090111: extra soft steep decay emission and peculiar re-brightening

We present a detailed study of GRB090111, focusing on its extra soft power-law photon index Gamma>5 at the very steep decay phase emission (power-law index alpha=5.1, steeper than 96% of GRBs detected by Swift) and the following peculiar…

High Energy Astrophysical Phenomena · Physics 2015-05-14 R. Margutti , T. Sakamoto , G. Chincarini , C. Guidorzi , J. Mao , F. Pasotti , D. Burrows , P. D'Avanzo , S. Campana , S. D. Barthelmy , N. Gehrels

REM observations of GRB 060418 and GRB 060607A: the onset of the afterglow and the initial fireball Lorentz factor determination

Gamma-ray burst (GRB) emission is believed to originate in highly relativistic fireballs. Currently, only lower limits were securely set to the initial fireball Lorentz factor Gamma_0. We aim to provide a direct measure of Gamma_0. The…

Astrophysics · Physics 2008-11-26 E. Molinari , S. D. Vergani , D. Malesani , S. Covino , P. D'Avanzo , G. Chincarini , F. M. Zerbi , L. A. Antonelli , P. Conconi , V. Testa , G. Tosti , F. Vitali , F. D'Alessio , G. Malaspina , L. Nicastro , E. Palazzi , D. Guetta , S. Campana , P. Goldoni , N. Masetti , E. J. A. Meurs , A. Monfardini , L. Norci , E. Pian , S. Piranomonte , D. Rizzuto , M. Stefanon , L. Stella , G. Tagliaferri , P. A. Ward , G. Ihle , L. Gonzalez , A. Pizarro , P. Sinclair , J. Valenzuela

Fermi-GBM Discovery of GRB 221009A: An Extraordinarily Bright GRB from Onset to Afterglow

We report the discovery of GRB 221009A, the highest flux gamma-ray burst ever observed by the Fermi Gamma-ray Burst Monitor (GBM). This GRB has continuous prompt emission lasting more than 600 seconds which smoothly transitions to afterglow…

High Energy Astrophysical Phenomena · Physics 2023-08-09 S. Lesage , P. Veres , M. S. Briggs , A. Goldstein , D. Kocevski , E. Burns , C. A. Wilson-Hodge , P. N. Bhat , D. Huppenkothen , C. L. Fryer , R. Hamburg , J. Racusin , E. Bissaldi , W. H. Cleveland , S. Dalessi , C. Fletcher , M. M. Giles , B. A. Hristov , C. M. Hui , B. Mailyan , C. Malacaria , S. Poolakkil , O. J. Roberts , A. von Kienlin , J. Wood , M. Ajello , M. Arimoto , L. Baldini , J. Ballet , M. G. Baring , D. Bastieri , J. Becerra Gonzalez , R. Bellazzini , E. Bissaldi , R. D. Blandford , R. Bonino , P. Bruel , S. Buson , R. A. Cameron , R. Caputo , P. A. Caraveo , E. Cavazzuti , G. Chiaro , N. Cibrario , S. Ciprini , P. Cristarella Orestano , M. Crnogorcevic , A. Cuoco , S. Cutini , F. DAmmando , S. De Gaetano , N. Di Lalla , L. Di Venere , A. Dominguez , S. J. Fegan , E. C. Ferrara , H. Fleischhack , Y. Fukazawa , S. Funk , P. Fusco , G. Galanti , V. Gammaldi , F. Gargano , C. Gasbarra , D. Gasparrini , S. Germani , F. Giacchino , N. Giglietto , R. Gill , M. Giroletti , J. Granot , D. Green , I. A. Grenier , S. Guiriec , M. Gustafsson , E. Hays , J. W. Hewitt , D. Horan , X. Hou , M. Kuss , L. Latronico , A. Laviron , M. Lemoine-Goumard , J. Li , I. Liodakis , F. Longo , F. Loparco , L. Lorusso , M. N. Lovellette , P. Lubrano , S. Maldera , A. Manfreda , G. Marti-Devesa , M. N. Mazziotta , J. E. McEnery , I. Mereu , M. Meyer , P. F. Michelson , T. Mizuno , M. E. Monzani , A. Morselli , I. V. Moskalenko , M. Negro , E. Nuss , N. Omodei , E. Orlando , J. F. Ormes , D. Paneque , G. Panzarini , M. Persic , M. Pesce-Rollins , R. Pillera , F. Piron , H. Poon , T. A. Porter , G. Principe , S. Raino , R. Rando , B. Rani , M. Razzano , S. Razzaque , A. Reimer , O. Reimer , F. Ryde , M. Sanchez-Conde , P. M. Saz Parkinson , L. Scotton , D. Serini , C. Sgro , V. Sharma , E. J. Siskind , G. Spandre , P. Spinelli , H. Tajima , D. F. Torres , J. Valverde , T. Venters , Z. Wadiasingh , K. Wood , G. Zaharijas

GRB 120711A: an intense INTEGRAL burst with long-lasting soft gamma-ray emission and a powerful optical flash

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…

High Energy Astrophysical Phenomena · Physics 2014-09-05 A. Martin-Carrillo , L. Hanlon , M. Topinka , A. P. LaCluyzé , V. Savchenko , D. A. Kann , A. S. Trotter , S. Covino , T. Krühler , J. Greiner , S. McGlynn , D. Murphy , P. Tisdall , S. Meehan , C. Wade , B. McBreen , D. E. Reichart , D. Fugazza , J. B. Haislip , A. Rossi , P. Schady , J. Elliott , S. Klose

Brightest GRB flare observed in GRB 221009A: bridge the last gap between flare and prompt emission in GRB

Flares are usually observed during the afterglow phase of Gamma-Ray Bursts (GRBs) in soft X-ray, optical and radio bands, but rarely in gamma-ray band. Despite the extraordinary brightness, GECAM-C has accurately measured both the bright…

High Energy Astrophysical Phenomena · Physics 2026-01-19 Zheng-Hang Yu , Chen-Wei Wang , Shao-Lin Xiong , Shuang-Xi Yi , Wen-Long Zhang , Wen-Jun Tan , Yan-Qiu Zhang , Chao Zheng , Hao-Xuan Guo , Jia-Cong Liu , Yang-Zhao Ren , Yue Wang , Sheng-Lun Xie , Wang-Chen Xue , Jin-Peng Zhang , Peng Zhang , Zheng-Hua An , Ce Cai , Pei-Yi Feng , Min Gao , Ke Gong , Dongya Guo , Yue Huang , Bing Li , Cheng-Kui Li , Xiao-Bo Li , Xin-Qiao Li , Ya-Qing Liu , Xiao-Jing Liu , Xiang Ma , Wenxi Peng , Rui Qiao , Li-Ming Song , Jin Wang , Jin-Zhou Wang , Ping Wang , Xiang-Yang Wen , Shuo Xiao , Sheng Yang , Shu-Xu Yi , Qi-Bin Yi , Da-Li Zhang , Fan Zhang , Shuang-Nan Zhang , Yan-Ting Zhang , Zhen Zhang , Xiao-Yun Zhao , Yi Zhao , Shi-Jie Zheng

The peak-flux of GRB 221009A measured with GRBAlpha

The brightest gamma-ray burst ever observed, long-duration GRB 221009A, was detected by GRBAlpha nano-satellite without saturation. We present light curves of the prompt emission in 13 energy bands, from 80 keV to 950 keV, and perform a…

High Energy Astrophysical Phenomena · Physics 2023-08-30 Jakub Ripa , Hiromitsu Takahashi , Yasushi Fukazawa , Norbert Werner , Filip Munz , Andras Pal , Masanori Ohno , Marianna Dafcikova , Laszlo Meszaros , Balazs Csak , Nikola Husarikova , Martin Kolar , Gabor Galgoczi , Jean-Paul Breuer , Filip Hroch , Jan Hudec , Jakub Kapus , Marcel Frajt , Maksim Rezenov , Robert Laszlo , Martin Koleda , Miroslav Smelko , Peter Hanak , Pavol Lipovsky , Tomas Urbanec , Miroslav Kasal , Ales Povalac , Yuusuke Uchida , Helen Poon , Hiroto Matake , Kazuhiro Nakazawa , Nagomi Uchida , Tamas Bozoki , Gergely Dalya , Teruaki Enoto , Zsolt Frei , Gergely Friss , Yuto Ichinohe , Kornel Kapas , Laszlo L. Kiss , Tsunefumi Mizuno , Hirokazu Odaka , Janos Takatsy , Martin Topinka , Kento Torigoe

Swift Observations of GRB 051109B

We present Swift observations of GRB 051109B, a soft long burst triggered by the Burst Alert Telescope (BAT). The soft photon index of the prompt emission suggest it is a X-ray Flash (XRF) or, at least, a X-ray Rich (XRR) burst. The X-ray…

Astrophysics · Physics 2010-11-11 E. Troja , G. Cusumano , V. LaParola , V. Mangano , T. Mineo

Swift and Fermi observations of the early afterglow of the short Gamma-Ray Burst 090510

We present the observations of GRB090510 performed by the Fermi Gamma-Ray Space Telescope and the Swift observatory. This is a bright, short burst that shows an extended emission detected in the GeV range. Furthermore, its optical emission…

High Energy Astrophysical Phenomena · Physics 2015-05-14 M. De Pasquale , P. Schady , N. P. M. Kuin , M. J. Page , P. A. Curran , S. Zane , S. R. Oates , S. T. Holland , A. A. Breeveld , E. A. Hoversten , G. Chincarini , D. Grupe , Fermi/LAT , Fermi/GBM collaborations. Minor changes in the authorlist

Phenomenology of Reverse-Shock Emission in the Optical Afterglows of Gamma Ray Bursts

We use a parent sample of 118 gamma-ray burst (GRB) afterglows, with known redshift and host galaxy extinction, to separate afterglows with and without signatures of dominant reverse-shock emission and to determine which physical conditions…

High Energy Astrophysical Phenomena · Physics 2015-06-18 J. Japelj , D. Kopac , S. Kobayashi , R. Harrison , C. Guidorzi , F. J. Virgili , C. G. Mundell , A. Melandri , A. Gomboc

Early steep optical decay linked to reverse shock for GRB200131A

We observed an optical afterglow of GRB 200131A obtaining the first photometric point 63 s after the satellite trigger. This early observation shows a steep decay, suggesting either internal engine activity or a reverse shock. By fitting…

High Energy Astrophysical Phenomena · Physics 2025-01-06 Martin Jelínek , Filip Novotný , Sylvio Klose , Bringfried Stecklum , Alžběta Maleňáková , Jan Štrobl

GRB 221009A: the B.O.A.T Burst that Shines in Gamma Rays

We present a complete analysis of Fermi Large Area Telescope (LAT) data of GRB 221009A, the brightest Gamma-Ray Burst (GRB) ever detected. The burst emission above 30 MeV detected by the LAT preceded by 1 s the low-energy (< 10 MeV) pulse…

High Energy Astrophysical Phenomena · Physics 2024-09-10 M. Axelsson , M. Ajello , M. Arimoto , L. Baldini , J. Ballet , M. G. Baring , C. Bartolini , D. Bastieri , J. Becerra Gonzalez , R. Bellazzini , B. Berenji , E. Bissaldi , R. D. Blandford , R. Bonino , P. Bruel , S. Buson , R. A. Cameron , R. Caputo , P. A. Caraveo , E. Cavazzuti , C. C. Cheung , G. Chiaro , N. Cibrario , S. Ciprini , G. Cozzolongo , P. Cristarella Orestano , M. Crnogorcevic , A. Cuoco , S. Cutini , F. D'Ammando , S. De Gaetano , N. Di Lalla , A. Dinesh , R. Di Tria , L. Di Venere , A. Domínguez , S. J. Fegan , E. C. Ferrara , A. Fiori , A. Franckowiak , Y. Fukazawa , S. Funk , P. Fusco , G. Galanti , F. Gargano , C. Gasbarra , S. Germani , F. Giacchino , N. Giglietto , M. Giliberti , R. Gill , F. Giordano , M. Giroletti , J. Granot , D. Green , I. A. Grenier , S. Guiriec , M. Gustafsson , M. Hashizume , E. Hays , J. W. Hewitt , D. Horan , T. Kayanoki , M. Kuss , A. Laviron , J. Li , I. Liodakis , F. Longo , F. Loparco , L. Lorusso , B. Lott , M. N. Lovellette , P. Lubrano , S. Maldera , D. Malyshev , A. Manfreda , G. Martí-Devesa , R. Martinelli , I. Martinez Castellanos , M. N. Mazziotta , J. E. McEnery , I. Mereu , M. Meyer , P. F. Michelson , N. Mirabal , W. Mitthumsiri , T. Mizuno , P. Monti-Guarnieri , M. E. Monzani , T. Morishita , A. Morselli , I. V. Moskalenko , M. Negro , R. Niwa , N. Omodei , M. Orienti , E. Orlando , D. Paneque , G. Panzarini , M. Persic , M. Pesce-Rollins , V. Petrosian , R. Pillera , F. Piron , T. A. Porter , G. Principe , J. L. Racusin , S. Rainò , R. Rando , B. Rani , M. Razzano , S. Razzaque , A. Reimer , O. Reimer , F. Ryde , M. Sánchez-Conde , P. M. Saz Parkinson , D. Serini , C. Sgrò , V. Sharma , E. J. Siskind , G. Spandre , P. Spinelli , D. J. Suson , H. Tajima , D. Tak , J. B. Thayer , D. F. Torres , J. Valverde , G. Zaharijas , S. Lesage , M. S. Briggs , E. Burns , S. Bala , P. N. Bhat , W. H. Cleveland , S. Dalessi , C. de Barra , M. Gibby , M. M. Giles , R. Hamburg , B. A. Hristov , C. M. Hui , D. Kocevski , B. Mailyan , C. Malacaria , S. McBreen , S. Poolakkil , O. J. Roberts , L. Scotton , P. Veres , A. von Kienlin , C. A. Wilson-Hodge , J. Wood

The Bright Optical flash and Afterglow from the Gamma-Ray Burst GRB 130427A

The optical light that is generated simultaneously with the x-rays and gamma-rays during a gamma-ray burst (GRB) provides clues about the nature of the explosions that occur as massive stars collapse to form black holes. We report on the…

High Energy Astrophysical Phenomena · Physics 2015-06-18 W. T. Vestrand , J. Wren , A. Panaitescu , P. Wozniak , H. Davis , D. Palmer , G. Vianello , N. Omodei , S. Xiong , M. Briggs , M. Elphick , W. Rosing

Fermi-LAT Observations of the Gamma-ray Burst GRB 130427A

The observations of the exceptionally bright gamma-ray burst (GRB) 130427A by the Large Area Telescope aboard the Fermi Gamma-ray Space Telescope provide constraints on the nature of such unique astrophysical sources. GRB 130427A had the…

High Energy Astrophysical Phenomena · Physics 2013-12-10 LAT collaboration , GBM collaboration

The rise of the afterglow in GRB 050820a

The early optical afterglow of GRB 050820a recorded by the RAPTOR telescope shows both a contribution from the prompt emission and the initial rise of the afterglow. It is therefore well-suited for the study of the dynamical evolution of…

Astrophysics · Physics 2009-11-13 F. Genet , F. Daigne , R. Mochkovitch

H.E.S.S. Observations of the Prompt and Afterglow Phases of GRB 060602B

We report on the first completely simultaneous observation of a gamma-ray burst (GRB) using an array of Imaging Atmospheric Cherenkov Telescopes which is sensitive to photons in the very-high-energy (VHE) gamma-ray range (>~100 GeV). On…

Astrophysics · Physics 2008-12-18 HESS Collaboration , F. Aharonian

The early and late-time spectral and temporal evolution of GRB 050716

We report on a comprehensive set of observations of Gamma Ray Burst 050716, detected by the Swift satellite and subsequently followed-up rapidly in X-ray, optical and near infra-red wavebands. The prompt emission is typical of long-duration…

Astrophysics · Physics 2008-11-26 E. Rol , J. P. Osborne , K. L. Page , K. E. McGowan , A. P. Beardmore , P. T . O'Brien , A. J. Levan , D. Bersier , C. Guidorzi , F. Marshall , A. S. Fruchter , N. R. Tanvir , A. Monfardini , A. Gomboc , S. Barthelmy , N. P. Bannister

A Reverse Shock in GRB 130427A

We present extensive radio and millimeter observations of the unusually bright GRB 130427A at z=0.340, spanning 0.67 to 12 days after the burst. Taken in conjunction with detailed multi-band UV, optical, NIR, and X-ray observations we find…

High Energy Astrophysical Phenomena · Physics 2015-06-15 T. Laskar , E. Berger , B. A. Zauderer , R. Margutti , A. M. Soderberg , S. Chakraborti , R. Lunnan , R. Chornock , P. Chandra , A. Ray