Related papers: GRB 210619B optical afterglow polarization

Varying linear polarisation in the dust-free GRB 210610B

Long gamma ray bursts (GRBs) are produced by the collapse of some very massive stars, which emit ultra-relativistic jets. When the jets collide with the interstellar medium they decelerate and generate the so-called afterglow emission,…

High Energy Astrophysical Phenomena · Physics 2024-10-16 J. F. Agüí Fernández , A. de Ugarte Postigo , C. C. Thöne , S. Kobayashi , A. Rossi , K. Toma , M. Jelínek , D. A. Kann , S. Covino , K. Wiersema , D. Hartmann , P. Jakobsson , A. Martin-Carrillo , A. Melandri , M. De Pasquale , G. Pugliese , S. Savaglio , R. L. C. Starling , J. Štrobl , M. Della Valle , S. de Wet , T. Zafar

The Strongly Polarized Afterglow of GRB 020405

We report polarization measurements and photometry for the optical afterglow of the gamma-ray burst GRB 020405. We measured a highly significant 9.9% polarization (in V band) 1.3 days after the burst and argue that it is intrinsic to the…

Astrophysics · Physics 2009-11-07 D. Bersier , B. McLeod , P. M. Garnavich , M. J. Holman , T. Grav , J. Quinn , J. Kaluzny , P. M. Challis , R. G. Bower , D. J. Wilman , J. S. Heyl , S. T. Holland , V. Hradecky , S. Jha , K. Z. Stanek

Early Optical Polarization of a Gamma Ray Burst Afterglow

We report the optical polarization of a gamma ray burst (GRB) afterglow, obtained 203 seconds after the initial burst of gamma rays from GRB 060418, using a ring polarimeter on the robotic Liverpool Telescope. Our robust (2-sigma) upper…

Astrophysics · Physics 2009-11-13 Carole G. Mundell , Iain A. Steele , Robert J. Smith , Shiho Kobayashi , Andrea Melandri , Cristiano Guidorzi , Andreja Gomboc , Chris J. Mottram , David Clarke , Alessandro Monfardini , David Carter , David Bersier , .

GRB990712: First Indication of Polarization Variability in a Gamma-ray Burst Afterglow

We report the detection of significant polarization in the optical afterglow of GRB990712 on three instances 0.44, 0.70 and 1.45 days after the gamma-ray burst, with (P, theta) being (2.9% +- 0.4%, 121.1 degr +- 3.5 degr), (1.2% +- 0.4%,…

Astrophysics · Physics 2009-10-31 E. Rol , R. A. M. J. Wijers , P. M. Vreeswijk , L. Kaper , T. J. Galama , J. van Paradijs , C. Kouveliotou , N. Masetti , E. Pian , E. Palazzi , F. Frontera , E. P. J. van den Heuvel

Early-time polarized optical light curve of GRB 131030A

We report the polarized optical light curve of a gamma-ray burst afterglow obtained using the RoboPol instrument. Observations began 655 seconds after the initial burst of gamma-rays from GRB131030A, and continued uninterrupted for 2 hours.…

High Energy Astrophysical Phenomena · Physics 2015-06-22 O. G. King , D. Blinov , D. Giannios , I. Papadakis , E. Angelakis , M. Balokovic , L. Fuhrmann , T. Hovatta , P. Khodade , S. Kiehlmann , N. Kylafis , A. Kus , I. Myserlis , D. Modi , G. Panopoulou , I. Papamastorakis , V. Pavlidou , B. Pazderska , E. Pazderski , T. J. Pearson , C. Rajarshi , A. N. Ramaprakash , A. C. S. Readhead , P. Reig , K. Tassis , J. A. Zensus

GRB 091208B: First Detection of the Optical Polarization in Early Forward Shock Emission of a Gamma-Ray Burst Afterglow

We report that the optical polarization in the afterglow of GRB 091208B is measured at t = 149 - 706 s after the burst trigger, and the polarization degree is P = 10.4% +/- 2.5%. The optical light curve at this time shows a power-law decay…

High Energy Astrophysical Phenomena · Physics 2015-06-05 T. Uehara , K. Toma , K. S. Kawabata , S. Chiyonobu , Y. Fukazawa , Y. Ikejiri , T. Inoue , R. Itoh , T. Komatsu , H. Miyamoto , T. Mizuno , O. Nagae , H. Nakaya , T. Ohsugi , K. Sakimoto , M. Sasada , H. Tanaka , M. Uemura , M. Yamanaka , T. Yamashita , R. Yamazaki , M. Yoshida

Spectropolarimetry and photometry of the early afterglow of the gamma-ray burst GRB191221B

We report on results of spectropolarimetry of the afterglow of the long gamma-ray burst GRB 191221B, obtained with SALT/RSS and VLT/FORS2, as well as photometry from two telescopes in the MASTER Global Robotic Network, at the MASTER-SAAO…

High Energy Astrophysical Phenomena · Physics 2021-07-07 D. A. H. Buckley , S. Bagnulo , R. J. Britto , J. Mao , D. A. Kann , J. Cooper , V. Lipunov , D. M. Hewitt , S. Razzaque , N. P. M. Kuin , I. M. Monageng , S. Covino , P. Jakobsson , A. J. van der Horst , K. Wiersema , M. Böttcher , S. Campana , V. D'Elia , E. S. Gorbovskoy , I. Gorbunov , D. N. Groenewald , D. H. Hartmann , V. G. Kornilov , C. G. Mundell , R. Podesta , J. K. Thomas , N. Tyurina , D. Vlasenko , B. van Soelen , D. Xu

GRB 210619B: first gamma-ray burst detection by the novel polarimeter MOPTOP

GRB~210619B was a bright long gamma-ray burst (GRB) which was optically followed up by the novel polarimeter MOPTOP on the Liverpool Telescope (LT). This was the first GRB detection by the instrument since it began science observations.…

High Energy Astrophysical Phenomena · Physics 2023-06-09 M. Shrestha , I. A. Steele , S. Kobayashi , R. J. Smith , H. Jermak , A. Piascik , C. G. Mundell

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

Detailed optical and near-infrared polarimetry, spectroscopy and broadband photometry of the afterglow of GRB 091018: Polarisation evolution

[Abridged] A number of phenomena have been observed in GRB afterglows that defy explanation by simple versions of the standard fireball model, leading to a variety of new models. Polarimetry can be a major independent diagnostic of…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-04 K. Wiersema , P. A. Curran , T. Kruehler , A. Melandri , E. Rol , R. L. C. Starling , N. R. Tanvir , A. J. van der Horst , S. Covino , J. P. U. Fynbo , P. Goldoni , J. Gorosabel , J. Hjorth , S. Klose , C. G. Mundell , P. T. O'Brien , E. Palazzi , R. A. M. J. Wijers , V. D'Elia , P. A. Evans , R. Filgas , A. Gomboc , J. Greiner , C. Guidorzi , L. Kaper , S. Kobayashi , C. Kouveliotou , A. J. Levan , A. Rossi , A. Rowlinson , I. A. Steele , A. de Ugarte Postigo , S. D. Vergani

Variable polarization in the optical afterglow of GRB 021004

We present polarimetric observations of the afterglow of gamma-ray burst (GRB) 021004, obtained with the Nordic Optical Telescope (NOT) and the Very Large Telescope (VLT) between 8 and 17 hours after the burst. Comparison among the…

Astrophysics · Physics 2008-11-26 E. Rol , R. A. M. J. Wijers , J. P. U. Fynbo , J. Hjorth , J. Gorosabel , M. P. Egholm , J. M. Castro Cerón , A. J. Castro-Tirado , L. Kaper , N. Masetti , E. Palazzi , E. Pian , N. Tanvir , P. Vreeswijk , C. Kouveliotou , P. Moller , H. Pedersen , A. S. Fruchter , J. Rhoads , I. Burud , I. Salamanca , E. P. J. Van den Heuvel

Optical Spectropolarimetry of the GRB 020813 Afterglow

The optical afterglow of gamma-ray burst 020813 was observed for 3 hours with the LRIS spectropolarimeter at the Keck-I telescope, beginning 4.7 hours after the burst was detected by HETE-2. The spectrum reveals numerous metal absorption…

Astrophysics · Physics 2010-05-12 A. J. Barth , R. Sari , M. H. Cohen , R. W. Goodrich , P. A. Price , D. W. Fox , J. S. Bloom , A. M. Soderberg , S. R. Kulkarni

Photometric and late-time spectropolarimetric observations of GRB 250129A afterglow

Gamma-Ray Burst (GRB) afterglows arise from the interaction of relativistic ejecta with the circumburst medium and are observed across the electromagnetic spectrum. Afterglow polarisation is expected at early and late phases depending on…

High Energy Astrophysical Phenomena · Physics 2026-03-25 A. Ghosh , S. Razzaque , J. Barnard , J. C. Joshi , R. Gupta , D. A. H. Buckley , B. van Soelen , N. Dukiya , A. Gupta , A. S. Moskvitin , J. Cooper , S. Chandra , K. M. Jayasurya , K. Misra , N. Rawat , L. Resmi , O. I. Spiridonova , R. I. Uklein

Circular polarization in the optical afterglow of GRB 121024A

Gamma-ray bursts (GRBs) are most probably powered by collimated relativistic outflows (jets) from accreting black holes at cosmological distances. Bright afterglows are produced when the outflow collides with the ambient medium. Afterglow…

High Energy Astrophysical Phenomena · Physics 2014-10-03 K. Wiersema , S. Covino , K. Toma , A. J. van der Horst , K. Varela , M. Min , J. Greiner , R. L. C. Starling , N. R. Tanvir , R. A. M. J. Wijers , S. Campana , P. A. Curran , Y. Fan , J. P. U. Fynbo , J. Gorosabel , A. Gomboc , D. Gotz , J. Hjorth , Z. P. Jin , S. Kobayashi , C. Kouveliotou , C. Mundell , P. T. O'Brien , E. Pian , A. Rowlinson , D. M. Russell , R. Salvaterra , S. di Serego Alighieri , G. Tagliaferri , S. D. Vergani , J. Elliott , C. Farina , O. E. Hartoog , R. Karjalainen , S. Klose , F. Knust , A. J. Levan , P. Schady , V. Sudilovski , R. Willingale

Polarization Evolution of the GRB 020405 Afterglow

Polarization measurements for the optical counterpart to GRB 020405 are presented and discussed. Our observations were performed with the VLT-UT3 (Melipal) during the second and third night after the gamma-ray burst discovery. The…

Astrophysics · Physics 2009-11-07 S. Covino , D. Malesani , G. Ghisellini , D. Lazzati , S. di Serego Alighieri , M. Stefanon , A. Cimatti , M. Della Valle , F. Fiore , P. Goldoni , N. Kawai , G. L. Israel , E. Le Floc'h , I. F. Mirabel , G. Ricker , P. Saracco , L. Stella , G. Tagliaferri , F. M. Zerbi

Polarimetry and Photometry of Gamma-Ray Bursts with RINGO2

We present a catalog of early-time (~10^2-10^4s) photometry and polarimetry of all Gamma-Ray Burst (GRB) optical afterglows observed with RINGO2 imaging polarimeter on the Liverpool Telescope. For the 19 optical afterglows observed, the…

High Energy Astrophysical Phenomena · Physics 2017-08-02 I. A. Steele , D. Kopac , D. M. Arnold , R. J. Smith , S. Kobayashi , H. E. Jermak , C. G. Mundell , A. Gomboc , C. Guidorzi , A. Melandri , J. Japelj

Evolution of the polarization of the optical afterglow of the gamma-ray burst GRB 030329

We report 31 polarimetric observations of the afterglow of GRB 030329 with high signal-to-noise and high sampling frequency. We establish the polarization light curve, detect sustained polarization at the percent level, and find significant…

Astrophysics · Physics 2007-05-23 J. Greiner , S. Klose , K. Reinsch , H. M. Schmid , R. Sari , D. H. Hartmann , C. Kouveliotou , A. Rau , E. Palazzi , C. Straubmeier , B. Stecklum , S. Zharikov , G. Tovmassian , O. Barnbantner , C. Ries , E. Jehin , A. Henden , A. A. Kaas , T. Grav , J. Hjorth , H. Pedersen , R. A. M. J. Wijers , A. Kaufer , H. -S. Park , G. Williams , O. Reimer

GRB 080928 afterglow imaging and spectro-polarimetry

Among the large variety of astrophysical sources that we can observe, gamma-ray bursts (GRBs) are the most energetic of the whole Universe. The definition of a general picture describing the physics behind GRBs has always been a compelling…

High Energy Astrophysical Phenomena · Physics 2022-10-26 R. Brivio , S. Covino , P. D'Avanzo , K. Wiersema , J. R. Maund , M. G. Bernardini , S. Campana , A. Melandri

On the Polarization of Gamma Ray Bursts and their Optical Afterglows

The polarization of the optical afterglow (AG) of Gamma-Ray Bursts (GRBs) has only been measured in a few instances at various times after the GRB. In all cases except the best measured one (GRB 030329) the observed polarization and its…

Astrophysics · Physics 2007-05-23 Shlomo Dado , Arnon Dar , A. De Rujula

The discovery of polarization in the afterglow of GRB 990510 with the ESO Very Large Telescope

Following a BeppoSAX alert (Piro 1999a) and the discovery of the OT at SAAO (Vreeswijk et al. 1999a), we observed GRB 990510 with the FORS instrument on ESO's VLT Unit 1 (`Antu'). The burst is unremarkable in gamma rays, but in optical is…

Astrophysics · Physics 2009-10-31 R. A. M. J. Wijers , P. M. Vreeswijk , T. J. Galama , E. Rol , J. van Paradijs , C. Kouveliotou , T. Giblin , N. Masetti , E. Palazzi , E. Pian , F. Frontera , L. Nicastro , R. Falomo , P. Soffitta , L. Piro