Related papers: From precursor to afterglow: The complex evolution…

Prompt and afterglow early X-ray phases in the comoving frame. Evidence for Universal properties?

We analyze the Swift XRT light curves and spectra of the gamma-ray bursts (GRBs) for which the redshift has been measured. The sample consists of seven GRBs. The soft X-ray light curves of all these GRBs are separated into at least two…

Astrophysics · Physics 2007-05-23 G. Chincarini , A. Moretti , P. Romano , S. Covino , G. Tagliaferri , S. Campana , M. Goad , S. Kobayashi , B. Zhang , L. Angelini , P. Banat , S. Barthelmy , A. P. Beardmore , P. T. Boyd , A. Breeveld , D. N. Burrows , M. Capalbi , M. M. Chester , G. Cusumano , E. E. Fenimore , N. Gehrels , P. Giommi , J. E. Hill , D. Hinshaw , S. T. Holland , J. A. Kennea , H. A. Krimm , V. La Parola , V. Mangano , F. E. Marshall , K. O. Mason , J. A. Nousek , P. T. O'Brien , J. P. Osborne , M. Perri , P. Meszaros , P. W. A. Roming , T. Sakamoto , P. Schady , M. Still , A. A. Wells

GRB 021211 as a Faint Analogue of GRB 990123: Exploring the Similarities and Differences in their Optical Afterglows

We present B, V, Rc, J, H, and Ks photometry of the optical afterglow of the gamma-ray burst GRB 021211 taken at the Magellan, MMT, and WIYN observatories between 0.7 and 50 days after the burst. We find an intrinsic spectral slope at…

Astrophysics · Physics 2014-10-13 Stephen T. Holland , David Bersier , J. S. Bloom , Peter G. Garnavich , Nelson Caldwell , Peter Challis , Robert Kirshner , Kevin Luhman , Brian McLeod , K. Z. Stanek

Late-epoch optical and near-infrared observations of the GRB000911 afterglow and its host galaxy

We present the results of an optical and near-infrared (NIR) monitoring campaign of the counterpart of Gamma-Ray Burst (GRB) 000911, located at redshift z=1.06, from 5 days to more than 13 months after explosion. Our extensive dataset is a…

Astrophysics · Physics 2007-05-23 N. Masetti , E. Palazzi , E. Pian , L. Hunt , J. P. U. Fynbo , J. Gorosabel , S. Klose , S. Benetti , R. Falomo , A. Zeh , L. Amati , M. I. Andersen , A. J. Castro-Tirado , J. M. Castro Cerón , J. Danziger , F. Frontera , A. S. Fruchter , J. Greiner , J. Hjorth , B. L. Jensen , L. Kaper , C. Kouveliotou , A. Levan , A. Magazzu , P. Moller , L. Nicastro , H. Pedersen , N. R. Tanvir , P. M. Vreeswijk , R. A. M. J. Wijers , E. P. J. van den Heuvel

The host of GRB 060206: kinematics of a distant galaxy

We present early (starting 1.6h after the burst) WHT/ISIS optical spectroscopy of the afterglow of the gamma-ray burst GRB 060206 detecting a range of metal absorption lines and their fine-structure transitions. Additional information is…

Astrophysics · Physics 2008-12-10 Christina C. Thoene , Klaas Wiersema , Cedric Ledoux , Rhaana L. C. Starling , Antonio de Ugarte Postigo , Andrew J. Levan , Johan P. U. Fynbo , Peter A. Curran , Javier Gorosabel , Alexander J. van der Horst , Alvaro LLorente , Evert Rol , Nial R. Tanvir , Paul M. Vreeswijk , Ralph A. M. J. Wijers , Lisa J. Kewley

Discovery of the short gamma-ray burst GRB 050709

Gamma-Ray Bursts (GRBs) fall into two classes: short-hard and long-soft bursts. The latter are now known to have X-ray and optical afterglows, to occur at cosmological distances in star-forming galaxies, and to be associated with the…

Astrophysics · Physics 2011-07-19 J. S. Villasenor , D. Q. Lamb , G. R. Ricker , J. -L. Atteia , N. Kawai , N. Butler , Y. Nakagawa , J. G. Jernigan , M. Boer , G. B. Crew , T. Q. Donaghy , J. Doty , E. E. Fenimore , M. Galassi , C. Graziani , K. Hurley , A. Levine , F. Martel , M. Matsuoka , J. -F. Olive , G. Prigozhin , T. Sakamoto , Y. Shirasaki , M. Suzuki , T. Tamagawa , R. Vanderspek , S. E. Woosley , A. Yoshida , J. Braga , R. Manchanda , G. Pizzichini , K. Takagishi , M. Yamauchi

Comprehensive multi-wavelength modelling of the afterglow of GRB050525A

The Swift era has posed a challenge to the standard blast-wave model of Gamma Ray Burst (GRB) afterglows. The key observational features expected within the model are rarely observed, such as the achromatic steepening (`jet-break') of the…

High Energy Astrophysical Phenomena · Physics 2015-06-05 L. Resmi , K. Misra , G. Jóhannesson , A. J. Castro-Tirado , J. Gorosabel , M. Jelínek , D. Bhattacharya , P. Kubánek , G. C. Anupama , A. Sota , D. K. Sahu , A. de Ugarte Postigo , S. B. Pandey , R. Sánchez-Ramírez , M. Bremer , R. Sagar

Early Afterglows of Gamma-Ray Bursts in a Stratified Medium with a Power-Law Density Distribution

A long-duration gamma-ray burst (GRB) has been widely thought to arise from the collapse of a massive star, and it has been suggested that its ambient medium is a homogenous interstellar medium (ISM) or a stellar wind. There are two shocks…

High Energy Astrophysical Phenomena · Physics 2015-06-17 Shuang-Xi Yi , Xue-Feng Wu , Zi-Gao Dai

GRB 210704A: A Luminous Fast Blue Transient in a GRB Afterglow at $z = 2.34$

We present detailed, multi-wavelength analysis of GRB 210704A: a Fermi Gamma-ray Burst Monitor discovered and Fermi Large Area Telescope (LAT) detected gamma-ray burst (GRB). The burst is dominated by a short ($\approx 2$ s) pulse followed…

High Energy Astrophysical Phenomena · Physics 2026-04-17 Daniëlle L. A. Pieterse , Andrew J. Levan , Maria E. Ravasio , Jillian C. Rastinejad , Agnes P. C. van Hoof , Daniele B. Malesani , Nikhil Sarin , Gavin P. Lamb , Antonio Martin-Carrillo , Anya E. Nugent , Nial R. Tanvir , Peter G. Jonker , David Alexander Kann , José Feliciano Agüí Fernández , Edo Berger , Gregory Corcoran , Felice Cusano , Paolo D'Avanzo , Valerio D'Elia , Antonio de Ugarte Postigo , Dimple , Wen-fai Fong , Johan P. U. Fynbo , Luca Izzo , Elisabetta Maiorano , Andrea Melandri , Eliana Palazzi , Jonathan Quirola-Vásquez , Andrea Rossi , Alicia Rouco Escorial

Wind-Interaction Models for the Early Afterglows of Gamma-Ray Bursts: The Case of GRB 021004

Wind-interaction models for gamma-ray burst afterglows predict that the optical emission from the reverse shock drops below that from the forward shock within 100s of seconds of the burst. The typical frequency $\nu_m$ of the synchrotron…

Astrophysics · Physics 2009-11-07 Zhi-Yun Li , Roger A. Chevalier

The most distant optically polarised GRB afterglow: GRB 240419A at z = 5.178

Gamma-ray bursts (GRBs) are extremely bright phenomena powered by relativistic jets arising from explosive events at cosmological distances. The nature of the jet and the configuration of the local magnetic fields are still unclear, with…

High Energy Astrophysical Phenomena · Physics 2025-11-10 R. Brivio , S. Covino , M. Ferro , A. Saccardi , A. Martin-Carrillo , A. Kuwata , K. Toma , P. D'Avanzo , Y. -D. Hu , L. Izzo , S. Kobayashi , T. Laskar , G. Leloudas , D. B. Malesani , M. Pursiainen , S. Vergani , K. Wiersema , S. Bloemen , S. Campana , V. D'Elia , S. de Wet , M. de Pasquale , P. J. Groot , P. Jakobsson , J. Mao , A. Melandri , G. Pugliese , A. Rossi , R. Salvaterra , B. Schneider , N. R. Tanvir , J. van Roestel , P. M. Vreeswijk , T. Zafar

Swift captures the spectrally evolving prompt emission of GRB 070616

The origins of Gamma-ray Burst prompt emission are currently not well understood and in this context long, well-observed events are particularly important to study. We present the case of GRB 070616, analysing the exceptionally…

Astrophysics · Physics 2009-11-13 R. L. C. Starling , P. T. O'Brien , R. Willingale , K. L. Page , J. P. Osborne , M. De Pasquale , Y. E. Nakagawa , N. P. M. Kuin , K. Onda , J. P. Norris , T. N. Ukwatta , N. Kodaka , D. N. Burrows , J. A. Kennea , M. J. Page , M. Perri , C. B. Markwardt

Late afterglow emission statistics: a clear link between GW170817 and bright short GRBs

GW170817, the first neutron star merger event detected by advanced LIGO/Virgo detectors, was associated with an underluminous short duration GRB 170817A. In this work we compare the forward shock afterglow emission of GW170817/GRB 170817A…

High Energy Astrophysical Phenomena · Physics 2019-05-15 Kai-Kai Duan , Zhi-Ping Jin , Fu-Wen Zhang , Yi-Ming Zhu , Xiang Li , Yi-Zhong Fan , Da-Ming Wei

X-ray Analysis of Gamma-Ray Burst Flares and Underlying Afterglows: Insights into Origin of Flares

Gamma-ray burst (GRB) X-ray light curves exhibit a variety of complex temporal structures, such as flares and plateaus. The origin of flares seen in many GRB early afterglows is still uncertain. Here, we analyze a sample of 89 GRBs, 61 of…

High Energy Astrophysical Phenomena · Physics 2025-12-09 H. Dereli-Bégué , A. Pe'er , D. Bégué , F. Ryde , A. Gowri

GRANDMA and HXMT Observations of GRB 221009A -- the Standard-Luminosity Afterglow of a Hyper-Luminous Gamma-Ray Burst

GRB 221009A is the brightest Gamma-Ray Burst (GRB) detected in more than 50 years of study. In this paper, we present observations in the X-ray and optical domains after the GRB obtained by the GRANDMA Collaboration (which includes…

High Energy Astrophysical Phenomena · Physics 2023-05-17 D. A. Kann , S. Agayeva , V. Aivazyan , S. Alishov , C. M. Andrade , S. Antier , A. Baransky , P. Bendjoya , Z. Benkhaldoun , S. Beradze , D. Berezin , M. Boër , E. Broens , S. Brunier , M. Bulla , O. Burkhonov , E. Burns , Y. Chen , Y. P. Chen , M. Conti , M. W. Coughlin , W. W. Cui , F. Daigne , B. Delaveau , H. A. R. Devillepoix , T. Dietrich , D. Dornic , F. Dubois , J. -G. Ducoin , E. Durand , P. -A. Duverne , H. -B. Eggenstein , S. Ehgamberdiev , A. Fouad , M. Freeberg , D. Froebrich , M. Y. Ge , S. Gervasoni , V. Godunova , P. Gokuldass , E. Gurbanov , D. W. Han , E. Hasanov , P. Hello , T. Hussenot-Desenonges , R. Inasaridze , A. Iskandar , N. Ismailov , A. Janati , T. Jegou du Laz , S. M. Jia , S. Karpov , A. Kaeouach , R. W. Kiendrebeogo , A. Klotz , R. Kneip , N. Kochiashvili , N. Kunert , A. Lekic , S. Leonini , C. K. Li , W. Li , X. B. Li , J. Y. Liao , L. Logie , F. J. Lu , J. Mao , D. Marchais , R. Ménard , D. Morris , R. Natsvlishvili , V. Nedora , K. Noonan , K. Noysena , N. B. Orange , P. T. H. Pang , H. W. Peng , C. Pellouin , J. Peloton , T. Pradier , O. Pyshna , Y. Rajabo , S. Rau , C. Rinner , J. -P. Rivet , F. D. Romanov , P. Rosi , V. A. Rupchandani , M. Serrau , A. Shokry , A. Simon , K. Smith , O. Sokoliuk , M. Soliman , L. M. Song , A. Takey , Y. Tillayev , L. M. Tinjaca Ramirez , I. Tosta e Melo , D. Turpin , A. de Ugarte Postigo , S. Vanaverbeke , V. Vasylenko , D. Vernet , Z. Vidadi , C. Wang , J. Wang , L. T. Wang , X. F. Wang , Shaolin L. Xiong , Y. P. Xu , W. C. Xue , X. Zeng , S. N. Zhang , H. S. Zhao , X. F. Zhao

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

Optical/Multiwavelength Observations of GRB Afterglows

I review gamma-ray burst optical/multiwavelength afterglow observations since 1997, when the first counterparts to GRBs were discovered. I discuss what we have learned from multiwavelength observations of GRB afterglows in relation to the…

Astrophysics · Physics 2009-10-31 Titus J. Galama

Discovery of a short plateau phase in the early evolution of a gamma-ray burst afterglow

We report optical observations during the first hour of the gamma-ray burst (GRB) afterglow of GRB021004. Our observation revealed the existence of a short plateau phase, in which the afterglow remained at almost constant brightness, before…

Astrophysics · Physics 2015-06-24 Makoto Uemura , Taichi Kato , Ryoko Ishioka , Hitoshi Yamaoka

Short GRB 160821B: a reverse shock, a refreshed shock, and a well-sampled kilonova

We report our identification of the optical afterglow and host galaxy of the short-duration gamma-ray burst GRB 160821B. The spectroscopic redshift of the host is $z=0.162$, making it one of the lowest redshift sGRBs identified by Swift.…

High Energy Astrophysical Phenomena · Physics 2019-09-25 G. P. Lamb , N. R. Tanvir , A. J. Levan , A. de Ugarte Postigo , K. Kawaguchi , A. Corsi , P. A. Evans , B. Gompertz , D. B. Malesani , K. L. Page , K. Wiersema , S. Rosswog , M. Shibata , M. Tanaka , A. J. van der Horst , Z. Cano , J. P. U. Fynbo , A. S. Fruchter , J. Greiner , K. Heintz , A. Higgins , J. Hjorth , L. Izzo , P. Jakobsson , D. A. Kann , P. T. O'Brien , D. A. Perley , E. Pian , G. Pugliese , R. L. C. Starling , C. C. Thöne , D. Watson , R. A. M. J. Wijers , D. Xu

Gamma-ray burst early optical afterglows: implications for the initial Lorentz factor and the central engine

Early optical afterglows have been observed from GRB 990123, GRB 021004, and GRB 021211, which reveal rich emission features attributed to reverse shocks. It is expected that Swift will discover many more early afterglows. Here we…

Astrophysics · Physics 2011-06-21 Bing Zhang , Shiho Kobayashi , Peter Meszaros

Looking Into the Fireball: ROTSE-III and Swift Observations of Early GRB Afterglows

We report on a complete set of early optical afterglows of gamma-ray bursts (GRBs) obtained with the ROTSE-III telescope network from March 2005 through June 2007. This set is comprised of 12 afterglows with early optical and Swift/XRT…

High Energy Astrophysical Phenomena · Physics 2009-08-17 E. S. Rykoff , F. Aharonian , C. W. Akerlof , M. C. B. Ashley , S. D. Barthelmy , H. A. Flewelling , N. Gehrels , E. Gogus , T. Guver , U. Kiziloglu , H. A. Krimm , T. A. McKay , M. Ozel , A. Phillips , R. M. Quimby , G. Rowell , W. Rujopakarn , B. E. Schaefer , D. A. Smith , W. T. Vestrand , J. C. Wheeler , J. Wren , F. Yuan , S. A. Yost