Search Results - "Racusin, Judith"
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Gamma-Ray Bursts as Sources of Strong Magnetic Fields
Published in Space Science Reviews (01-10-2015)“…Gamma-Ray Bursts (GRBs) are the strongest explosions in the Universe, which due to their extreme character likely involve some of the strongest magnetic fields…”
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Closure Relations of Gamma-Ray Bursts in High Energy Emission
Published in The Astrophysical journal (27-09-2019)“…The synchrotron external shock model predicts the evolution of the spectral (β) and temporal ( ) indices during the gamma-ray burst (GRB) afterglow for…”
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GRB 221009A: The BOAT
Published in Astrophysical journal. Letters (01-03-2023)“…GRB 221009A has been referred to as the brightest of all time (BOAT). We investigate the veracity of this statement by comparing it with a half century of…”
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A Search for High-energy Counterparts to Fast Radio Bursts
Published in The Astrophysical journal (01-07-2019)“…We report on a search for high-energy counterparts to fast radio bursts (FRBs) with the Fermi Gamma-ray Burst Monitor, Fermi Large Area Telescope, and the Neil…”
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AN ANALYSIS OF CHANDRA DEEP FOLLOW-UP GAMMA-RAY BURSTS: IMPLICATIONS FOR OFF-AXIS JETS
Published in The Astrophysical journal (10-06-2015)“…ABSTRACT We present a sample of 27 gamma-ray bursts (GRBs) with detailed Swift light curves supplemented by late-time Chandra observations. To answer the…”
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Multiresolution HEALPix Maps for Multiwavelength and Multimessenger Astronomy
Published in The Astronomical journal (01-06-2022)“…HEALPix—the Hierarchical Equal Area isoLatitude Pixelization—has become a standard in high-energy and gravitational wave astronomy. Originally developed to…”
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Temporal and Spectral Evolution of Gamma-Ray Burst Broad Pulses: Identification of High-latitude Emission in the Prompt Emission
Published in The Astrophysical journal (01-06-2023)“…We perform a detailed analysis of broad pulses in bright gamma-ray bursts (GRBs) to understand the evolution of GRB broad pulses. Using the temporal and…”
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GRB 160625B: Evidence for a Gaussian-shaped Jet
Published in The Astrophysical journal (01-12-2020)“…We present multiwavelength modeling of the afterglow from the long γ-ray burst (GRB) 160625B using Markov Chain Monte Carlo techniques of the afterglowpy…”
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GRB 191016A: A Long Gamma-Ray Burst Detected by TESS
Published in The Astrophysical journal (01-04-2021)“…The Transiting Exoplanet Survey Satellite (TESS) exoplanet-hunting mission detected the rising and decaying optical afterglow of GRB 191016A, a long gamma-ray…”
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A Comprehensive Analysis of Swift XRT Data. III. Jet Break Candidates in X-Ray and Optical Afterglow Light Curves
Published in The Astrophysical journal (01-03-2008)“…The Swift XRT data for 179 GRBs (050124 to 070129) and the optical afterglow data for 57 pre- and post-Swift GRBs are analyzed to explore whether the observed…”
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Evidence of High-latitude Emission in the Prompt Phase of GRBs: How Far from the Central Engine are the GRBs Produced?
Published in Astrophysical journal. Letters (01-03-2024)“…One of the difficulties in nailing down the physical mechanism of gamma-ray bursts (GRBs) comes from the fact that there has been no clear observational…”
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Improving the Low-energy Transient Sensitivity of AMEGO-X using Single-site Events
Published in The Astrophysical journal (01-08-2022)“…AMEGO-X, the All-sky Medium Energy Gamma-ray Observatory eXplorer, is a proposed instrument designed to bridge the so-called “MeV gap” by surveying the sky…”
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X-ray Evolution of SNR 1987A: The Radial Expansion
Published in The Astrophysical journal (01-10-2009)“…We present the evolution of the radial expansion of SNR 1987A as measured using Chandra X-ray observations taken over the last 10 years. To characterize the…”
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Evolution of the Chandra CCD spectra of SNR 1987A: probing the reflected-shock picture
Published in Monthly notices of the Royal Astronomical Society (01-09-2010)“…We continue to explore the validity of the reflected-shock structure (RSS) picture in SNR 1987A that was proposed in our previous analyses of the X-ray…”
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Evolutionary Status of SNR 1987A at the Age of Eighteen
Published in The Astrophysical journal (01-08-2006)“…Approximately 18 yr after the supernova explosion, the blast wave of SNR 1987A is entering the main body of the equatorial circumstellar material, which is…”
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Exploring the Behaviour of Long Gamma-Ray Bursts with Intrinsic Afterglow Correlations: log L200s−α>200s
Published in Galaxies (10-01-2017)“…In these proceedings, we summarise the exploration so far of the relationship between the afterglow luminosity (measured at rest frame 200s; logL200slogL200s )…”
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Swift XRT Observations of the Afterglow of XRF 050416A
Published in The Astrophysical journal (01-01-2007)“…Swift discovered XRF 050416A with the Burst Alert Telescope and began observing it with its narrow-field instruments only 64.5 s after the burst onset. Its…”
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Swift Observations of GRB 050603: An Afterglow with a Steep Late-Time Decay Slope
Published in The Astrophysical journal (01-07-2006)“…We report the results of Swift observations of the gamma-ray burst GRB 050603. With a V magnitude V = 18.2 about 10 hr after the burst, the optical afterglow…”
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Toward an Understanding of GRB Prompt Emission Mechanism. II. Patterns of Peak Energy Evolution and Their Connection to Spectral Lags
Published in The Astrophysical journal (20-12-2018)“…The prompt emission phase of gamma-ray bursts (GRBs) exhibits two distinct patterns of the peak energy (Ep) evolution, i.e., time-resolved spectral analyses of…”
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SEEKING COUNTERPARTS TO ADVANCED LIGO/Virgo TRANSIENTS WITH SWIFT
Published in The Astrophysical journal (01-11-2012)“…Binary neutron star (NS) mergers are among the most promising astrophysical sources of gravitational wave (GW) emission for Advanced LIGO and Advanced Virgo,…”
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