相关论文: GRB 020813: polarization in the case of a smooth o…

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%,…

天体物理学 · 物理学 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

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…

天体物理学 · 物理学 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

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…

天体物理学 · 物理学 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

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…

天体物理学 · 物理学 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

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…

天体物理学 · 物理学 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

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…

高能天体物理现象 · 物理学 2021-07-21 Gal Birenbaum , Omer Bromberg

Lowly polarized light from a highly magnetized jet of GRB 190114C

We report multi-color optical imaging and polarimetry observations of the afterglow of the first TeV- detected gamma-ray burst, GRB 190114C, using RINGO3 and MASTER II polarimeters. Observations begin 31 s after the onset of the GRB and…

高能天体物理现象 · 物理学 2020-04-08 N. Jordana-Mitjans , C. G. Mundell , S. Kobayashi , R. J. Smith , C. Guidorzi , I. A. Steele , M. Shrestha , A. Gomboc , M. Marongiu , R. Martone , V. Lipunov , E. S. Gorbovskoy , D. A. H. Buckley , R. Rebolo , N. M. Budnev

The broadband afterglow of GRB 030328

We here report on the photometric, spectroscopic and polarimetric monitoring of the optical afterglow of the Gamma-Ray Burst (GRB) 030328 detected by HETE-2. We found that a smoothly broken power-law decay provides the best fit of the…

天体物理学 · 物理学 2009-11-11 E. Maiorano , N. Masetti , E. Palazzi , S. Savaglio , E. Rol , E. Pian , P. M. Vreeswijk , P. A. Price , B. A. Peterson , M. Jelinek , S. B. Pandey , M. I. Andersen , A. A. Henden

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…

高能天体物理现象 · 物理学 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

Physics of the GRB 030328 afterglow and its environment

We report on the photometric, spectroscopic and polarimetric, monitoring of the optical afterglow of Gamma-Ray Burst (GRB) 030328 detected by HETE-2. Photometry, collected at 7 different telescopes, shows that a smoothly broken powerlaw…

天体物理学 · 物理学 2008-11-26 E. Maiorano , N. Masetti , E. Palazzi , S. Savaglio , E. Rol , P. M. Vreeswijk , E. Pian , P. A. Price , B. A. Peterson , M. Jelinek , L. Amati , M. I. Andersen , A. J. Castro-Tirado , J. M. Castro Cerón , A. de Ugarte Postigo , F. Frontera , A. S. Fruchter , J. P. U. Fynbo , J. Gorosabel , A. A. Henden , J. Hjorth , B. L. Jensen , S. Klose , C. Kouveliotou , G. Masi , P. Møller , L. Nicastro , E. O. Ofek , S. B. Pandey , J. Rhoads , N. R. Tanvir , R. A. M. J. Wijers , E. P. J. van den Heuvel

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…

宇宙学与河外天体物理 · 物理学 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

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…

天体物理学 · 物理学 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 , .

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…

高能天体物理现象 · 物理学 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

Optical and NIR monitoring of the GRB020405 afterglow

Optical and near-infrared (NIR) observations of GRB020405 started about 1 day after the GRB and extended over ~70 days. Photometry shows that the early decay is consistent with a single power law of index alpha = 1.54 +- 0.06 in all bands.…

天体物理学 · 物理学 2007-05-23 N. Masetti , E. Palazzi , E. Pian

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…

高能天体物理现象 · 物理学 2022-10-26 R. Brivio , S. Covino , P. D'Avanzo , K. Wiersema , J. R. Maund , M. G. Bernardini , S. Campana , A. Melandri

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…

天体物理学 · 物理学 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

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…

高能天体物理现象 · 物理学 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

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.…

高能天体物理现象 · 物理学 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

Radio linear polarization of GRB afterglows: Instrumental Systematics in ALMA observations of GRB 171205A

Polarization measurements of gamma-ray burst (GRB) afterglows are a promising means of probing the structure, geometry, and magnetic composition of relativistic GRB jets. However, a precise treatment of instrumental calibration is vital for…

高能天体物理现象 · 物理学 2020-06-03 Tanmoy Laskar , Charles L. H. Hull , Paulo Cortes

High-Precision Photometry of the Gamma-Ray Burst 020813: The Smoothest Afterglow Yet

We report results of our precise reduction of the high signal-to-noise VRI observations of the optical afterglow of the gamma-ray burst GRB 020813 obtained by Gladders & Hall with the Magellan 6.5-m telescope 3.9-4.9 hours after the burst.…

天体物理学 · 物理学 2009-11-10 L. T. Laursen , K. Z. Stanek