Search Results - "CHORNOCK, RYAN"
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First Multimessenger Observations of a Neutron Star Merger
Published in Annual review of astronomy and astrophysics (01-01-2021)“…We describe the first observations of the same celestial object with gravitational waves and light. GW170817 was the first detection of a neutron star merger…”
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Nebular-phase Spectra of Superluminous Supernovae: Physical Insights from Observational and Statistical Properties
Published in The Astrophysical journal (20-01-2019)“…We study the spectroscopic evolution of superluminous supernovae (SLSNe) later than 100 days after maximum light. We present new data for Gaia16apd and SN…”
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A 2.4% DETERMINATION OF THE LOCAL VALUE OF THE HUBBLE CONSTANT
Published in The Astrophysical journal (20-07-2016)“…ABSTRACT We use the Wide Field Camera 3 (WFC3) on the Hubble Space Telescope (HST) to reduce the uncertainty in the local value of the Hubble constant from…”
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Late-time Hubble Space Telescope Observations of a Hydrogen-poor Superluminous Supernova Reveal the Power-law Decline of a Magnetar Central Engine
Published in The Astrophysical journal (01-11-2021)“…Abstract The light-curve diversity of hydrogen-poor superluminous supernovae (SLSNe) has kept open the possibility that multiple power sources account for the…”
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Short GRB Host Galaxies. II. A Legacy Sample of Redshifts, Stellar Population Properties, and Implications for Their Neutron Star Merger Origins
Published in The Astrophysical journal (01-11-2022)“…Abstract We present the stellar population properties of 69 short gamma-ray burst (GRB) host galaxies, representing the largest uniformly modeled sample to…”
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Nearby supernova rates from the Lick Observatory Supernova Search - II. The observed luminosity functions and fractions of supernovae in a complete sample
Published in Monthly notices of the Royal Astronomical Society (01-04-2011)“…This is the second paper of a series in which we present new measurements of the observed rates of supernovae (SNe) in the local Universe, determined from the…”
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Revisiting the Lick Observatory Supernova Search Volume-limited Sample: Updated Classifications and Revised Stripped-envelope Supernova Fractions
Published in Publications of the Astronomical Society of the Pacific (01-05-2017)“…We re-examine the classifications of supernovae (SNe) presented in the Lick Observatory Supernova Search (LOSS) volume-limited sample with a focus on the…”
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SuperRAENN: A Semisupervised Supernova Photometric Classification Pipeline Trained on Pan-STARRS1 Medium-Deep Survey Supernovae
Published in The Astrophysical journal (01-12-2020)“…Automated classification of supernovae (SNe) based on optical photometric light-curve information is essential in the upcoming era of wide-field time domain…”
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Nearby supernova rates from the Lick Observatory Supernova Search - I. The methods and data base
Published in Monthly notices of the Royal Astronomical Society (01-04-2011)“…This is the first paper of a series in which we present new measurements of the observed rates of supernovae (SNe) in the local Universe, determined from the…”
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10
Short GRB Host Galaxies. I. Photometric and Spectroscopic Catalogs, Host Associations, and Galactocentric Offsets
Published in The Astrophysical journal (01-11-2022)“…Abstract We present a comprehensive optical and near-infrared census of the fields of 90 short gamma-ray bursts (GRBs) discovered in 2005–2021, constituting…”
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11
The Radio to GeV Afterglow of GRB 221009A
Published in Astrophysical journal. Letters (01-03-2023)“…Abstract GRB 221009A ( z = 0.151) is one of the closest known long γ -ray bursts (GRBs). Its extreme brightness across all electromagnetic wavelengths provides…”
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Seven Years of Coordinated Chandra–NuSTAR Observations of SN 2014C Unfold the Extreme Mass-loss History of Its Stellar Progenitor
Published in The Astrophysical journal (01-11-2022)“…Abstract We present the results from our 7 yr long broadband X-ray observing campaign of SN 2014C with Chandra and NuSTAR. These coordinated observations…”
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SN 2016iet: The Pulsational or Pair Instability Explosion of a Low-metallicity Massive CO Core Embedded in a Dense Hydrogen-poor Circumstellar Medium
Published in The Astrophysical journal (20-08-2019)“…We present optical photometry and spectroscopy of SN 2016iet (=Gaia16bvd=PS17brq), an unprecedented Type I supernova (SN I) at z = 0.0676 with no obvious…”
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14
Radio and X-Ray Observations of the Luminous Fast Blue Optical Transient AT 2020xnd
Published in The Astrophysical journal (01-02-2022)“…Abstract We present deep X-ray and radio observations of the fast blue optical transient (FBOT) AT 2020xnd/ZTF 20acigmel at z = 0.2433 from 13 days to 269 days…”
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15
Early Time Spectropolarimetry of the Aspherical Type II Supernova SN 2023ixf
Published in Astrophysical journal. Letters (01-10-2023)“…Abstract We present six epochs of optical spectropolarimetry of the Type II supernova (SN) 2023ixf ranging from ∼2 to 15 days after the explosion. Polarimetry…”
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Target-of-opportunity Observations of Gravitational-wave Events with Vera C. Rubin Observatory
Published in The Astrophysical journal. Supplement series (01-05-2022)“…Abstract The discovery of the electromagnetic counterpart to the binary neutron star (NS) merger GW170817 has opened the era of gravitational-wave…”
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A VLA Study of High-redshift GRBs. I. Multiwavelength Observations and Modeling of GRB 140311A
Published in The Astrophysical journal (01-05-2018)“…We present the first results from a recently concluded study of GRBs at z 5 with the Karl G. Jansky Very Large Array (VLA). Spanning 1 to 85.5 GHz and 7 epochs…”
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Hubble Space Telescope Observations of GW170817: Complete Light Curves and the Properties of the Galaxy Merger of NGC 4993
Published in The Astrophysical journal (01-02-2022)“…Abstract We present the complete set of Hubble Space Telescope imaging of the binary neutron star merger GW170817 and its optical counterpart AT 2017gfo…”
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OPTICAL IDENTIFICATION OF CEPHEIDS IN 19 HOST GALAXIES OF TYPE Ia SUPERNOVAE AND NGC 4258 WITH THE HUBBLE SPACE TELESCOPE
Published in The Astrophysical journal (10-10-2016)“…ABSTRACT We present results of an optical search conducted as part of the SH0ES project (Supernovae and H 0 for the Equation of State of dark energy) for…”
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The Type II superluminous SN 2008es at late times: near-infrared excess and circumstellar interaction
Published in Monthly notices of the Royal Astronomical Society (21-09-2019)“…SN 2008es is one of the rare cases of a Type II superluminous supernova (SLSN), showing no narrow features in its early-time spectra, and therefore, its…”
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