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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

Fermi and Swift Gamma-Ray Burst Afterglow Population Studies

The new and extreme population of GRBs detected by Fermi-LAT shows several new features in high energy gamma-rays that are providing interesting and unexpected clues into GRB prompt and afterglow emission mechanisms. Over the last 6 years,…

High Energy Astrophysical Phenomena · Physics 2015-05-28 J. L. Racusin , S. R. Oates , P. Schady , D. N. Burrows , M. de Pasquale , D. Donato , N. Gehrels , S. Koch , J. McEnery , T. Piran , P. Roming , T. Sakamoto , C. Swenson , E. Troja , V. Vasileiou , F. Virgili , D. Wanderman , B. Zhang

Modeling the high-energy emission in GRB 110721A and implications on the early multiwavelength and polarimetric observations

GRB 110721A was detected by the Gamma-ray Burst Monitor and the Large Area Telescope (LAT) onboard the Fermi satellite and the Gamma-ray Burst Polarimeter onboard the IKAROS solar mission. Previous analysis done of this burst showed: i) a…

High Energy Astrophysical Phenomena · Physics 2017-10-25 N. Fraija , W. H. Lee , M. Araya , P. Veres , R. Barniol Duran , S. Guiriec

Afterglow Observations of Fermi-LAT Gamma-Ray Bursts and the Emerging Class of Hyper-Energetic Events

We present broadband (radio, optical, and X-ray) light curves and spectra of the afterglows of four long-duration gamma-ray bursts (GRBs 090323, 090328, 090902B, and 090926A) detected by the Gamma-Ray Burst Monitor (GBM) and Large Area…

High Energy Astrophysical Phenomena · Physics 2015-05-18 S. B. Cenko , D. A. Frail , F. A. Harrison , J. B. Haislip , D. E. Reichart , N. R. Butler , B. E. Cobb , A. Cucchiara , E. Berger , J. S. Bloom , P. Chandra , D. B. Fox , D. A. Perley , J. X. Prochaska , A. V. Filippenko , K. Glazebrook , K. M. Ivarsen , M. M. Kasliwal , S. R. Kulkarni , A. P. LaCluyze , S. Lopez , A. N. Morgan , M. Pettini , V. R. Rana

The Afterglow of GRB 130427A from 1 to 10^16 GHz

We present multiwavelength observations of the afterglow of GRB 130427A, the brightest (in total fluence) gamma-ray burst of the past 29 years. Optical spectroscopy from Gemini-North reveals the redshift of the GRB to be z=0.340, indicating…

High Energy Astrophysical Phenomena · Physics 2014-01-14 D. A. Perley , S. B. Cenko , A. Corsi , N. R. Tanvir , A. J. Levan , D. A. Kann , E. Sonbas , K. Wiersema , W. Zheng , X. -H. Zhao , J. -M. Bai , M. Bremer , A. J. Castro-Tirado , L. Chang , K. I. Clubb , D. Frail , A. Fruchter , E. Göğüş , J. Greiner , T. Güver , A. Horesh , A. V. Filippenko , S. Klose , J. Mao , A. N. Morgan , A. S. Pozanenko , S. Schmidl , B. Stecklum , M. Tanga , A. A. Volnova , A. E. Volvach , J. -G. Wang , J. -M. Winters , Y. -X. Xin

{\em Fermi}/GBM Short Gamma-ray Burst Catalog and Case Study for GRB 170817A/GW 170817

Motivating by the discovery of association between GW 170817 and sGRB 170817A, we present a comprehensive analysis for sGRBs observed with Fermi/GBM in 9 operation years and study the properties of sGRB 170817A -like events. We derive a…

High Energy Astrophysical Phenomena · Physics 2017-10-20 Rui-Jing Lu , Shen-Shi Du , Ji-Gui Cheng , Hou-Jun Lü , Hai-Ming Zhang , Lin Lan , En-Wei Liang

Bimodal Long-Lasting Components in Short Gamma-Ray Bursts: Promising Electromagnetic Counterparts to Neutron Star Binary Mergers

Long-lasting emission of short gamma-ray bursts (GRBs) is crucial to reveal the physical origin of the central engine as well as to detect electromagnetic (EM) counterparts to gravitational waves (GWs) from neutron star binary mergers. We…

High Energy Astrophysical Phenomena · Physics 2017-09-20 Shota Kisaka , Kunihito Ioka , Takanori Sakamoto

A search for thermal X-ray signatures in Gamma-Ray Bursts II: The Swift sample

In several gamma-ray bursts (GRBs) excess emission, in addition to the standard synchrotron afterglow spectrum, has been discovered in the early time X-ray observations. It has been proposed that this excess comes from black body emission,…

High Energy Astrophysical Phenomena · Physics 2015-03-20 M. Sparre , R. L. C. Starling

A decade of Gamma-Ray Bursts observed by $Fermi$-LAT: The 2$^{nd}$ GRB catalog

The Large Area Telescope (LAT) aboard the $Fermi$ spacecraft routinely observes high-energy emission from gamma-ray bursts (GRBs). Here we present the second catalog of LAT-detected GRBs, covering the first 10 years of operations, from 2008…

High Energy Astrophysical Phenomena · Physics 2019-06-28 M. Axelsson , E. Bissaldi , N. Omodei , G. Vianello

A multi-wavelength analysis of a collection of short-duration GRBs observed between 2012-2015

We investigate the prompt emission and the afterglow properties of short duration gamma-ray burst (sGRB) 130603B and another eight sGRB events during 2012-2015, observed by several multi-wavelength facilities including the GTC 10.4m…

High Energy Astrophysical Phenomena · Physics 2019-03-06 S. B. Pandey , Y. Hu , A. J. Castro-Tirado , A. S. Pozanenko , R. Sánchez-Ramírez , J. Gorosabel , 5 S. Guziy , M. Jelinek , J. C. Tello , S. Jeong , S. R. Oates , B. -B. Zhang , E. D. Mazaeva , A. A. Volnova , P. Yu. Minaev , H. J. van Eerten , M. D. Caballero-García , D. Pérez-Ramírez , M. Bremer , J. -M. Winters , I. H. Park , A. Nicuesa Guelbenzu , S. Klose , A. Moskvitin , V. V. Sokolov , E. Sonbas , A. Ayala , J. Cepa , N. Butler , E. Troja , A. M. Chernenko , S. V. Molkov , A. E. Volvach , R. Ya. Inasaridze , Sh. A. Egamberdiyev , O. Burkhonov , I. V. Reva , K. A. Polyakov , A. A. Matkin , A. L. Ivanov , I. Molotov , T. Guver , A. M. Watson , A. Kutyrev , W. H. Lee , O. Fox , O. Littlejohns , A. Cucchiara , J. Gonzalez , M. G. Richer , C. G. Román-Zúñiga , N. R. Tanvir , J. S. Bloom , J. X. Prochaska , N. Gehrels , H. Moseley , J. A. de Diego , E. Ramírez-Ruiz , E. V. Klunko , Y. Fan , X. Zhao , J. Bai , Ch. Wang , Y. Xin , Ch. Cui , N. Tungalag , Z. -K. Peng , Amit Kumar , Rahul Gupta , Amar Aryan , Brajesh Kumar , L. N. Volvach , G. P. Lamb , A. F. Valeev

Clustering of LAT light curves: a clue to the origin of high-energy emission in Gamma-Ray Bursts

The physical origin of the >0.1 GeV emission detected from Gamma-Ray Bursts (GRBs) by the Fermi satellite has not yet been completely understood. In this work we consider the GeV light curves of ten GRBs with measured redshift detected by…

High Energy Astrophysical Phenomena · Physics 2015-06-22 L. Nava , G. Vianello , N. Omodei , G. Ghisellini , G. Ghirlanda , A. Celotti , F. Longo , R. Desiante , R. Barniol Duran

Gamma-Ray Burst Prompt Emission

The origin of gamma-ray burst (GRB) prompt emission, bursts of gamma-rays lasting from shorter than one second to thousands of seconds, remains not fully understood after more than 40 years of observations. The uncertainties lie in several…

High Energy Astrophysical Phenomena · Physics 2014-03-03 Bing Zhang

GRB 060607A: A GRB with Bright Asynchronous Early $X$-ray and Optical Emissions

The early optical emission of the moderately high redshift ($z=3.08$) GRB 060607A shows a remarkable broad and strong peak with a rapid rise and a relatively slow power-law decay. It is not coincident with the strong early-time flares seen…

Astrophysics · Physics 2009-06-23 Houri Ziaeepour , Stephen T. Holland , Patricia T. Boyd , Kim L. Page , Samantha Oates , Craig B. Markwardt , Peter Meszaros , Neil Gehrels , Francis E. Marshall , Jay Cummings , Mike Goad

The prompt emission & peculiar break of GRB 060124

Our multi-wavelength analysis of GRB 060124 shows the unusual behaviour of the decaying lightcurve as well as supporting the recently proposed phenomenon of long-lasting central engine activity. The prompt X-ray emission displays uncommonly…

Astrophysics · Physics 2010-11-11 P. A. Curran , D. A. Kann , P. Ferrero , E. Rol , R. A. M. J. Wijers

Early Optical Observations of GRB 150910A: Bright Jet Optical Afterglow and X-ray Dipole Radiation from a Magnetar Central Engine

Gamma-ray burst (GRB) 150910A was detected by {\it Swift}/BAT, and then rapidly observed by {\it Swift}/XRT, {\it Swift}/UVOT, and ground-based telescopes. We report Lick Observatory spectroscopic and photometric observations of…

High Energy Astrophysical Phenomena · Physics 2020-06-17 Lang Xie , Xiang-Gao Wang , Song-Mei Qin , WeiKang Zheng , Alexei V. Filippenko , Long Li , Tian-Ci Zheng , Le Zou , Da-Bin Lin , Yinan Zhu , Heechan Yuk , Rui-Jing Lu , En-Wei Liang

The long-lasting optical afterglow plateau of short burst GRB 130912A

The short burst GRB 130912A was detected by Swift, Fermi satellites and several ground-based optical telescopes. Its X-ray light curve decayed with time normally. The optical emission, however, displayed a long term plateau, which is the…

High Energy Astrophysical Phenomena · Physics 2015-04-03 Biao Zhu , Fu-Wen Zhang , Shuai Zhang , Zhi-Ping Jin , Da-Ming Wei

GRB 080319B: A Naked-Eye Stellar Blast from the Distant Universe

Long duration gamma-ray bursts (GRBs) release copious amounts of energy across the entire electromagnetic spectrum, and so provide a window into the process of black hole formation from the collapse of a massive star. Over the last forty…

Astrophysics · Physics 2010-05-12 J. L. Racusin , S. V. Karpov , M. Sokolowski , J. Granot , X. F. Wu , V. Pal'shin , S. Covino , A. J. van der Horst , S. R. Oates , P. Schady , R. J. Smith , J. Cummings , R. L. C. Starling , L. W. Piotrowski , B. Zhang , P. A. Evans , S. T. Holland , K. Malek , M. T. Page , L. Vetere , R. Margutti , C. Guidorzi , A. Kamble , P. A. Curran , A. Beardmore , C. Kouveliotou , L. Mankiewicz , A. Melandri , P. T. O'Brien , K. L. Page , T. Piran , N. R. Tanvir , G. Wrochna , R. L. Aptekar , C. Bartolini , S. Barthelmy , G. M. Beskin , S. Bondar , S. Campana , A. Cucchiara , M. Cwiok , P. D'Avanzo , V. D'Elia , M. Della Valle , W. Dominik , A. Falcone , F. Fiore , D. B. Fox , D. D. Frederiks , A. S. Fruchter , D. Fugazza , M. Garrett , N. Gehrels , S. Golenetskii , A. Gomboc , G. Greco , A. Guarnieri , S. Immler , G. Kasprowicz , A. J. Levan , E. P. Mazets , E. Molinari , A. Moretti , K. Nawrocki , P. P. Oleynik , J. P. Osborne , C. Pagani , Z. Paragi , M. Perri , A. Piccioni , E. Ramirez-Ruiz , P. W. A. Roming , I. A. Steele , R. G. Strom , V. Testa , G. Tosti , M. V. Ulanov , K. Wiersema , R. A. M. J. Wijers , A. F. Zarnecki , F. Zerbi , P. Meszaros , G. Chincarini , D. N. Burrows

Gamma-Ray Burst detection prospects for next generation ground-based VHE facilities

Gamma-ray Bursts (GRB) were discovered by satellite-based detectors as powerful sources of transient $\gamma$-ray emission. The Fermi satellite detected an increasing number of these events with its dedicated Gamma-ray Burst Monitor (GBM),…

Instrumentation and Methods for Astrophysics · Physics 2021-09-29 G. La Mura , U. Barres de Almeida , R. Conceição , A. De Angelis , F. Longo , M. Pimenta , E. Prandini , E. Ruiz-Velasco , B. Tomé

Hard GRB spectra: thermal vs non-thermal emission

We consider the evidence for very hard low energy spectra during the prompt phase of Gamma Ray Bursts (GRB). In particular we examine the spectral evolution of GRB 980306 together with the detailed analysis of some other bursts already…

Astrophysics · Physics 2007-05-23 G. Ghirlanda , A. Celotti , G. Ghisellini

Exploring Origin of Ultra-Long Gamma-ray Bursts: Lessons from GRB 221009A

The brightest Gamma-ray burst (GRB) ever, GRB 221009A, displays ultra-long GRB (ULGRB) characteristics, with a prompt emission duration exceeding 1000 s. To constrain the origin and central engine of this unique burst, we analyze its prompt…

High Energy Astrophysical Phenomena · Physics 2024-06-04 Amit Kumar Ror , Rahul Gupta , Amar Aryan , Shashi Bhushan Pandey , S. R. Oates , A. J. Castro-Tirado , Sudhir Kumar