Search Results - "Hartmann, D. H"
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Deep ATCA and VLA Radio Observations of Short-GRB Host Galaxies. Constraints on Star Formation Rates, Afterglow Flux, and Kilonova Radio Flares
Published in The Astrophysical journal (20-12-2019)“…We report the results of an extensive radio-continuum observing campaign of host galaxies of short gamma-ray bursts (GRBs). The goal of this survey was to…”
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A Systematic Analysis of Supernova Light in Gamma-Ray Burst Afterglows
Published in The Astrophysical journal (10-07-2004)“…We systematically reanalyzed all gamma-ray burst (GRB) afterglow data published through the end of 2002 in an attempt to detect the predicted supernova light…”
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Swift-XRT follow-up of gravitational wave triggers during the third aLIGO/Virgo observing run
Published in Monthly notices of the Royal Astronomical Society (01-12-2020)“…ABSTRACT The Neil Gehrels Swift Observatory followed up 18 gravitational wave (GW) triggers from the LIGO/Virgo collaboration during the O3 observing run in…”
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Swift/UVOT Follow-Up of Gravitational Wave Alerts in the O3 Era
Published in Monthly notices of the Royal Astronomical Society (05-08-2021)“…In this paper, we report on the observational performance of the Swift Ultra-violet/Optical Telescope (UVOT) in response to the gravitational wave (GW) alerts…”
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Revealing High-z Fermi-LAT BL Lacs Using Swift and SARA Data with Photometric Analysis
Published in The Astrophysical journal (01-03-2024)“…Abstract BL Lacertae (BL Lac) objects are a subclass of blazar, distinguished by their featureless optical spectrum. The featureless spectrum presents a…”
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Photospheric Emission in the Joint GBM and Konus Prompt Spectra of GRB 120323A
Published in The Astrophysical journal (10-09-2017)“…GRB 120323A is a very intense short gamma -ray burst (GRB) detected simultaneously during its prompt γ-ray emission phase with the Gamma-ray Burst Monitor…”
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Spectropolarimetry and photometry of the early afterglow of the gamma-ray burst GRB 191221B
Published in Monthly notices of the Royal Astronomical Society (11-08-2021)“…ABSTRACT 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…”
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A Hubble Space Telescope Search for r-Process Nucleosynthesis in Gamma-Ray Burst Supernovae
Published in The Astrophysical journal (01-06-2024)“…Abstract The existence of a secondary (in addition to compact object mergers) source of heavy element ( r -process) nucleosynthesis, the core-collapse of…”
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How Massive Single Stars End Their Life
Published in The Astrophysical journal (01-07-2003)Get full text
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10
Weibel Instability and Associated Strong Fields in a Fully Three-Dimensional Simulation of a Relativistic Shock
Published in The Astrophysical journal (10-06-2009)Get full text
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GRB 171010A/SN 2017htp: a GRB-SN at z = 0.33
Published in Monthly notices of the Royal Astronomical Society (21-12-2019)“…ABSTRACT The number of supernovae known to be connected with long-duration gamma-ray bursts (GRBs) is increasing and the link between these events is no longer…”
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Swift Multiwavelength Follow-up of LVC S200224ca and the Implications for Binary Black Hole Mergers
Published in The Astrophysical journal (01-02-2021)“…On 2020 February 24, during their third observing run ("O3"), the Laser Interferometer Gravitational-wave Observatory and Virgo Collaboration detected…”
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Multiwavelength Analysis of the Intriguing GRB 061126: The Reverse Shock Scenario and Magnetization
Published in The Astrophysical journal (01-11-2008)“…We present a detailed study of the prompt and afterglow emission from Swift GRB 061126 using BAT, XRT, UVOT data and multicolor optical imaging from 10…”
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A New Measurement of the Hubble Constant and Matter Content of the Universe Using Extragalactic Background Light γ-Ray Attenuation
Published in The Astrophysical journal (10-11-2019)“…The Hubble constant H0 and matter density m of the universe are measured using the latest γ-ray attenuation results from Fermi-LAT and Cerenkov telescopes…”
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Swift and NuSTAR observations of GW170817: Detection of a blue kilonova
Published in Science (American Association for the Advancement of Science) (22-12-2017)“…With the first direct detection of merging black holes in 2015, the era of gravitational wave (GW) astrophysics began. A complete picture of compact object…”
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Magnetic field generation in a jet-sheath plasma via the kinetic Kelvin-Helmholtz instability
Published in Annales geophysicae (1988) (01-01-2013)“…We have investigated the generation of magnetic fields associated with velocity shear between an unmagnetized relativistic jet and an unmagnetized sheath…”
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Signatures of a jet cocoon in early spectra of a supernova associated with a γ-ray burst
Published in Nature (London) (17-01-2019)“…Long γ-ray bursts are associated with energetic, broad-lined, stripped-envelope supernovae 1 , 2 and as such mark the death of massive stars. The scarcity of…”
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New High-z BL Lacs Using the Photometric Method with Swift and SARA
Published in The Astrophysical journal (01-06-2018)“…BL Lacertae (BL Lac) objects are prominent members of the third Fermi Large Area Telescope catalog of γ-ray sources. Half of the members of the BL Lac…”
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Hunting Distant BL Lacertae Objects with the Photometric Technique Using Swift and SARA
Published in The Astrophysical journal (01-07-2020)“…BL Lacertae objects represent a large fraction (22%) of γ-ray sources in the Third Fermi Large Area Telescope catalog (3FGL). Nearly half of the BL Lac object…”
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M31N 2008-12a-THE REMARKABLE RECURRENT NOVA IN M31: PANCHROMATIC OBSERVATIONS OF THE 2015 ERUPTION
Published in The Astrophysical journal (20-12-2016)“…ABSTRACT The Andromeda Galaxy recurrent nova M31N 2008-12a had been observed in eruption 10 times, including yearly eruptions from 2008 to 2014. With a…”
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