Related papers: Early Optical Polarization of a Gamma Ray Burst Af…

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

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-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

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

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

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

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

GRB 990510: linearly polarized radiation from a fireball

Models for gamma-ray burst afterglows envisage an hyper-relativistic fireball that is decelerated in the ambient medium around the explosion site. This interaction produces a shock wave which amplifies the magnetic field and accelerates…

Astrophysics · Physics 2007-05-23 S. Covino , D. Lazzati , G. Ghisellini , P. Saracco , S. Campana , G. Chincarini , S. Di Serego , A. Cimatti , L. Vanzi , L. Pasquini , F. Haardt , G. L. Israel , L. Stella , M. Vietri , .

Early polarization observations of the optical emission of gamma-ray bursts: GRB150301B and GRB150413A

We report early optical linear polarization observations of two gamma-ray bursts made with the MASTER robotic telescope network. We found the minimum polar- ization for GRB150301B to be 8% at the beginning of the initial stage, whereas we…

High Energy Astrophysical Phenomena · Physics 2015-12-09 E. S. Gorbovskoy , V. M. Lipunov , D. Buckley , V. G. Kornilov , P. V. Balanutsa , N. V. Tyurina , A. S. Kuznetsov , D. A. Kuvshinov , I. A. Gorbunov , D. Vlasenko , E. Popova , V. V. Chazov , S. Potter , M. Kotze , A. Kniazev , O. A. Gress , N. M. Budnev , K. I. Ivanov , S. A. Yazev , A. G. Tlatov , V. A. Senik , D. V. Dormidontov , A. V. Parhomenko , V. V. Krushinski , I. S. Zalozhnich , R. Alberto Castro-Tirado , R. Sanchez-Ramrez , Yu. P. Sergienko , A. Gabovich , V. V. Yurkov , H. Levato , C. Saffe , C. Mallamaci , C. Lopez , F. Podest

First Detection of Radio Linear Polarization in a Gamma Ray Burst Afterglow

We report the first detection of radio polarization of a GRB afterglow with the first intensive combined use of telescopes in the millimeter and submillimeter ranges for GRB171205A. The linear polarization degree in the millimeter band at…

High Energy Astrophysical Phenomena · Physics 2019-11-06 Y. Urata , K. Toma , K. Huang , K. Asada , H. Nagai , S. Takahashi , G. Petitpas , M. Tashiro , K. Yamaoka

GRB 210619B optical afterglow polarization

We report on the follow-up of the extremely bright long gamma-ray burst GRB~210619B with optical polarimetry. We conducted optopolarimetric observations of the optical afterglow of GRB~210619B in the SDSS-r band in the time window ~ 5967 -…

High Energy Astrophysical Phenomena · Physics 2023-12-29 N. Mandarakas , D. Blinov , D. R. Aguilera-Dena , S. Romanopoulos , V. Pavlidou , K. Tassis , J. Antoniadis , S. Kiehlmann , A. Lychoudis , L. F. Tsemperof Kataivatis

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

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

Modeling the Linear Polarization of GRB Afterglows Across the Electromagnetic Spectrum

Linear polarization measurements in the optical band show polarization degrees of a few percent at late times. Recently, polarization at sub-percent level was also detected in radio by ALMA, opening the window for multi-wavelength…

High Energy Astrophysical Phenomena · Physics 2021-07-21 Gal Birenbaum , Omer Bromberg

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

Limits on optical polarization during the prompt phase of GRB 140430A

Gamma-ray burst GRB 140430A was detected by the Swift satellite and observed promptly with the imaging polarimeter RINGO3 mounted on the Liverpool Telescope, with observations beginning while the prompt $\gamma$-ray emission was still…

High Energy Astrophysical Phenomena · Physics 2015-10-28 D. Kopac , C. G. Mundell , J. Japelj , D. M. Arnold , I. A. Steele , C. Guidorzi , S. Dichiara , S. Kobayashi , A. Gomboc , R. M. Harrison , G. P. Lamb , A. Melandri , R. J. Smith , F. J. Virgili , A. J. Castro-Tirado , J. Gorosabel , A. Jarvinen , R. Sanchez-Ramirez , S. R. Oates , M. Jelinek

Polarimetry and Photometry of Gamma-Ray Bursts Afterglows with RINGO3

We present photometric and polarimetric measurements of gamma-ray burst (GRB) optical afterglows observed by the RINGO3 imaging polarimeter over its $\sim$7 year lifetime mounted on the Liverpool Telescope. During this time, RINGO3…

High Energy Astrophysical Phenomena · Physics 2022-08-24 M. Shrestha , I. A. Steele , S. Kobayashi , R J. Smith , C. Guidorzi , N. Jordana-Mitjans , H. Jermak , D. Arnold , C. G. Mundell , A. Gomboc

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

The Early-time Optical Properties of Gamma-Ray Burst Afterglows

We present a multiwavelength analysis of 63 Gamma-Ray Bursts observed with the world's three largest robotic optical telescopes, the Liverpool and Faulkes Telescopes (North and South). Optical emission was detected for 24 GRBs with…

Astrophysics · Physics 2009-11-13 A. Melandri , C. G. Mundell , S. Kobayashi , C. Guidorzi , A. Gomboc , I. A. Steele , R. J. Smith , D. Bersier , C. J. Mottram , D. Carter , M. F. Bode , P. T. O'Brien , N. R. Tanvir , E. Rol , R. Chapman

Coherence scale of magnetic fields generated in early-time forward shocks of GRBs

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…

High Energy Astrophysical Phenomena · Physics 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