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Related papers: A search for radio afterglows from gamma-ray burst…

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It has been widely recognized that gamma-ray burst (GRB) afterglows arise from interactions between GRB outflow and circumburst medium, while their evolution follows the behaviors of relativistic shock waves. Assuming the distribution of…

High Energy Astrophysical Phenomena · Physics 2022-03-17 Bo Zhang , Liang-Duan Liu , Tian-Rui Sun , Fen Lyu , Xue-Feng Wu

The serendipitous observation of GRB 780506 by co-aligned gamma-ray (HEAO 1 A-4 0.02 - 6 MeV) and X-ray (HEAO 1 A-2 2-60 keV) instruments during a six hour pointing at a blank section of the sky gave us unprecedented high signal-to-noise…

Astrophysics · Physics 2009-10-30 A. Connors , G. J. Hueter

We present VLBI and archival Karl G. Jansky Very Large Array (VLA) and Westerbork Synthesis Radio Telescope (WSRT) observations of the radio afterglow from the gamma-ray burst (GRB) of 2003 March 29 (GRB 030329) taken between 672 and 2032…

High Energy Astrophysical Phenomena · Physics 2015-06-11 Robert Mesler , Ylva Pihlström , Greg Taylor , Johnathan Granot

Gamma-ray burst (GRB) afterglow emission can be observed from sub-TeV to radio wavelengths, though only 6.6\% of observed GRBs present radio afterglows. We examine GRB radio light curves (LCs) to look for the presence of radio plateaus,…

High Energy Astrophysical Phenomena · Physics 2022-02-02 Delina Levine , Maria Dainotti , Kevin J. Zvonarek , Nissim Fraija , Donald C. Warren , Poonam Chandra , Nicole Lloyd-Ronning

We present results from a search for the radio counterpart to the possible neutron star-black hole merger GW190814 with the Australian Square Kilometre Array Pathfinder. We have carried out 10 epochs of observation spanning 2-655 days…

We model the possible afterglow of the Fermi GBM event associated with LIGO detection GW150914, under the assumption that the gamma-ray are produced by a short GRB-like relativistic outflow. We model GW150914-GBM as both a weak, on-axis…

High Energy Astrophysical Phenomena · Physics 2016-07-13 Brian J. Morsony , Jared C. Workman , Dominic M. Ryan

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…

A radio source that faded over six days, with a redshift of $z\approx0.5$ host, has been identified by Keane et al. (2016) as the transient afterglow to a fast radio burst (FRB 150418). We report follow-up radio and optical observations of…

High Energy Astrophysical Phenomena · Physics 2016-06-14 H. K. Vedantham , V. Ravi , K. Mooley , D. Frail , G. Hallinan , S. R. Kulkarni

(abridged) We present uniform, detailed spectral analyses of gamma-ray burst (GRB) X-ray afterglows observed with ASCA, Beppo-SAX, Chandra, and XMM-Newton, and critically evaluate the statistical significances of X-ray emission and…

Astrophysics · Physics 2009-11-10 Masao Sako , Fiona Harrison , Robert Rutledge

Gamma-ray bursts (GRBs) are thought to result from the interaction of an extremely relativistic outflow interacting with a small amount of material surrounding the site of the explosion. Multi-wavelength observations covering the gamma-ray…

We investigate the radio afterglows of gamma-ray bursts (GRBs) and hypernovae (HNe) at high redshifts and quantify their detectability, as well as their potential usefulness for 21 cm absorption line studies of the intergalactic medium…

Astrophysics · Physics 2009-11-10 Kunihito Ioka , Peter Meszaros

We present multi-frequency radio observations from the afterglow of GRB 980519 beginning 7.2 hours after the gamma-ray burst and ending 63 days later. The fast decline in the optical and X-ray light curves for this burst has been…

Fast Radio Bursts (FRBs) are millisecond-duration radio transients of mysterious origin, with growing evidence linking at least some of them to magnetars. While FRBs are primarily observed in the radio band, their potential multi-wavelength…

High Energy Astrophysical Phenomena · Physics 2026-01-21 Ke Bian , Can-Min Deng

Radio observations of the afterglow of the gamma-ray burst GRB970508 provide unique new constraints on afterglow models. The quenching of diffractive scintillation at 4 week delay provides the first direct estimate of source size and…

Astrophysics · Physics 2011-03-17 Eli Waxman , Shri R. Kulkarni , Dale A. Frail

We present the extensive follow-up campaign on the afterglow of GRB 110715A at 17 different wavelengths, from X-ray to radio bands, starting 81 seconds after the burst and extending up to 74 days later. We performed for the first time a GRB…

Here we present broadband radio modeling of GRB 240205B, using observations with the Australia Telescope Compact Array (ATCA) and the South African MeerKAT radio telescope. Our observations include an automatically triggered early-time ATCA…

High Energy Astrophysical Phenomena · Physics 2026-03-20 S. I. Chastain , G. E. Anderson , A. J. van der Horst , L. Rhodes , C. Morley , A. Gulati , J. K. Leung , T. D. Russel , S. D. Ryder

Using the generic hydrodynamic model of Gamma-Ray Burst (GRB) afterglows, we calculate the radio afterglow light curves of low luminosity, high luminosity, failed and standard GRBs in different observational bands of FAST's energy window.…

High Energy Astrophysical Phenomena · Physics 2015-06-18 Zhi-Bin Zhang , Si-Wei Kong , Yong-Feng Huang , Di Li , Long-Biao Li

A growing number of gamma-ray burst (GRB) afterglows is observed at very-high energies (VHE, $\gtrsim 100$ GeV). Yet, our understanding of the mechanism powering the VHE emission remains baffling. We make use of multi-wavelength…

High Energy Astrophysical Phenomena · Physics 2023-05-25 Ersilia Guarini , Irene Tamborra , Damien Bégué , Annika Rudolph

Short gamma-ray bursts (GRBs) are explosive transients caused by binary mergers of compact objects containing at least one neutron star. Multi-wavelength afterglow observations provide constraints on the physical parameters of the jet, its…