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Open AccessJournal ArticleDOI

Interstellar scintillation of compact extragalactic radio sources

Mark A. Walker
- 21 Feb 1998 - 
- Vol. 294, Iss: 2, pp 307-311
TLDR
In this article, the authors examined what is expected in respect of the interstellar scintillation of very compact, extragalactic radio sources and found that large-amplitude, rapid, variability is predicted at commonly observed radio frequencies (1-20 GHz) over the vast majority of the sky.
Abstract
The recent discovery of radio variability of a quasar on short time-scales (hours) prompts us to examine what is expected in respect of the interstellar scintillation of very compact, extragalactic radio sources. We find that large-amplitude, rapid, variability is predicted at commonly observed radio frequencies (1–20 GHz) over the vast majority of the extragalactic sky. As a guide to assist observers in understanding their data, we demonstrate simple techniques for predicting the effects of interstellar scintillation on any extragalactic source.

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Radio emission from the unusual supernova 1998bw and its association with the γ-ray burst of 25 April 1998

TL;DR: In this paper, radio observations of the supernova SN1998bw, which exploded at about the same time and in the same direction as the γ-ray burst GRB980425, were reported.
Journal ArticleDOI

Broadband observations of the naked-eye gamma-ray burst GRB 080319B

Judith Racusin, +99 more
- 11 Sep 2008 - 
TL;DR: Observations of the extraordinarily bright prompt optical and γ-ray emission of GRB 080319B that provide diagnostics within seconds of its formation, followed by broadband observations of the afterglow decay that continued for weeks.
Journal ArticleDOI

A radio counterpart to a neutron star merger

TL;DR: In this paper, the authors reported the detection of a counterpart radio source that appears 16 days after the GW170817 binary neutron star merger event, allowing them to diagnose the energetics and environment of the merger.
Journal ArticleDOI

A Radio Counterpart to a Neutron Star Merger

TL;DR: Radio observations constrain the energy and geometry of relativistic material ejected from a binary neutron star merger, and the detection of a counterpart radio source that appears 16 days after the event is reported, allowing us to diagnose the energetics and environment of the merger.
Journal ArticleDOI

Jet Energy and Other Parameters for the Afterglows of GRB 980703, GRB 990123, GRB 990510, and GRB 991216 Determined from Modeling of Multifrequency Data

TL;DR: In this article, the radio, optical, and X-ray emission for the afterglows of GRB 980703, GRB 990123, Grb 990510, and GrB 991216 were modeled within the framework of relativistic jets to determine their physical parameters, and the models that yield acceptable fits to the data have jet energies mostly between 1050 and 1051 ergs and initial opening angles between 1° and 4°.