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View article: Radio Afterglow Detection and AI-driven Response (RADAR): A Federated Framework for Gravitational-wave Event Follow-up
Radio Afterglow Detection and AI-driven Response (RADAR): A Federated Framework for Gravitational-wave Event Follow-up Open
The landmark detection of both gravitational waves (GWs) and electromagnetic (EM) radiation from the binary neutron star merger GW170817 has spurred efforts to streamline the follow-up of GW alerts in current and future observing runs of g…
View article: RADAR-Radio Afterglow Detection and AI-driven Response: A Federated Framework for Gravitational Wave Event Follow-Up
RADAR-Radio Afterglow Detection and AI-driven Response: A Federated Framework for Gravitational Wave Event Follow-Up Open
The landmark detection of both gravitational waves (GWs) and electromagnetic (EM) radiation from the binary neutron star merger GW170817 has spurred efforts to streamline the follow-up of GW alerts in current and future observing runs of g…
View article: Probing Binary Neutron Star Merger Ejecta and Remnants with Gravitational Wave and Radio Observations
Probing Binary Neutron Star Merger Ejecta and Remnants with Gravitational Wave and Radio Observations Open
We present a study aimed at quantifying the detectability of radio counterparts of binary neutron star (BNS) mergers with total masses $\lesssim 3$\,M$_{\odot}$, which may form neutron star (NS) remnants. We focus on mergers localized by g…
View article: A radio-quiet AGN as a candidate counterpart to neutrino event IceCube–200615A
A radio-quiet AGN as a candidate counterpart to neutrino event IceCube–200615A Open
Follow-up observations of neutrino events have been a promising method for identifying sources of very-high-energy cosmic rays. Neutrinos are unambiguous tracers of hadronic interactions and cosmic rays. On 2020 June 15, IceCube detected a…
View article: A Radio-quiet AGN as a candidate counterpart to neutrino event IceCube-200615A
A Radio-quiet AGN as a candidate counterpart to neutrino event IceCube-200615A Open
Follow-up observations of neutrino events have been a promising method for identifying sources of very-high-energy cosmic rays. Neutrinos are unambiguous tracers of hadronic interactions and cosmic rays. On June 15, 2020, IceCube detected …
View article: Explaining Nonmerger Gamma-Ray Bursts and Broad-lined Supernovae with Close Binary Progenitors with Black Hole Central Engines
Explaining Nonmerger Gamma-Ray Bursts and Broad-lined Supernovae with Close Binary Progenitors with Black Hole Central Engines Open
For over 25 yr, the origin of long-duration gamma-ray bursts (lGRBs) has been linked to the collapse of rotating massive stars. However, we have yet to pinpoint the stellar progenitor powering these transients. Moreover, the dominant engin…
View article: The luminous, slow-rising orphan afterglow AT2019pim as a candidate moderately relativistic outflow
The luminous, slow-rising orphan afterglow AT2019pim as a candidate moderately relativistic outflow Open
Classical gamma-ray bursts (GRBs) have two distinct emission episodes: prompt emission from ultrarelativistic ejecta and afterglow from shocked circumstellar material. While both components are extremely luminous in known GRBs, a variety o…
View article: Rubin ToO 2024: Envisioning the Vera C. Rubin Observatory LSST Target of Opportunity program
Rubin ToO 2024: Envisioning the Vera C. Rubin Observatory LSST Target of Opportunity program Open
The Legacy Survey of Space and Time (LSST) at Vera C. Rubin Observatory is planned to begin in the Fall of 2025. The LSST survey cadence has been designed via a community-driven process regulated by the Survey Cadence Optimization Committe…
View article: Optical and Radio Analysis of Systematically Classified Broad-lined Type Ic Supernovae from the Zwicky Transient Facility
Optical and Radio Analysis of Systematically Classified Broad-lined Type Ic Supernovae from the Zwicky Transient Facility Open
We study a magnitude-limited sample of 36 broad-lined type Ic supernovae (SNe Ic-BL) from the Zwicky Transient Facility Bright Transient Survey (detected between 2018 March and 2021 August), which is the largest systematic study of SNe Ic-…
View article: Key Science Goals for the Next Generation Very Large Array (ngVLA): Update from the ngVLA Science Advisory Council (2024)
Key Science Goals for the Next Generation Very Large Array (ngVLA): Update from the ngVLA Science Advisory Council (2024) Open
In 2017, the next generation Very Large Array (ngVLA) Science Advisory Council, together with the international astronomy community, developed a set of five Key Science Goals (KSGs) to inform, prioritize and refine the technical capabiliti…
View article: Radio transients from compact objects across the mass spectrum in the era of multi-messenger astronomy
Radio transients from compact objects across the mass spectrum in the era of multi-messenger astronomy Open
Compact objects across the mass spectrum–from neutron stars to supermassive black holes–are progenitors and/or central engines for some of the most cataclysmic phenomena in the Universe. As such, they are associated with radio emission on …
View article: Multi-messenger astrophysics of black holes and neutron stars as probed by ground-based gravitational wave detectors: from present to future
Multi-messenger astrophysics of black holes and neutron stars as probed by ground-based gravitational wave detectors: from present to future Open
The ground-based gravitational wave (GW) detectors LIGO and Virgo have enabled the birth of multi-messenger GW astronomy via the detection of GWs from merging stellar-mass black holes (BHs) and neutron stars (NSs). GW170817, the first bina…
View article: Multi-messenger Astrophysics of Black Holes and Neutron Stars as Probed by Ground-based Gravitational Wave Detectors: From Present to Future
Multi-messenger Astrophysics of Black Holes and Neutron Stars as Probed by Ground-based Gravitational Wave Detectors: From Present to Future Open
The ground-based gravitational wave (GW) detectors LIGO and Virgo have enabled the birth of multi-messenger GW astronomy via the detection of GWs from merging stellar-mass black holes (BHs) and neutron stars (NSs). GW170817, the first bina…
View article: Collapsars as Sites of r-process Nucleosynthesis: Systematic Photometric Near-infrared Follow-up of Type Ic-BL Supernovae
Collapsars as Sites of r-process Nucleosynthesis: Systematic Photometric Near-infrared Follow-up of Type Ic-BL Supernovae Open
One of the open questions following the discovery of GW170817 is whether neutron star (NS) mergers are the only astrophysical sites capable of producing r -process elements. Simulations have shown that 0.01–0.1 M ⊙ of r -process material c…
View article: The Luminous, Slow-Rising Orphan Afterglow AT2019pim as a Candidate Moderately Relativistic Outflow
The Luminous, Slow-Rising Orphan Afterglow AT2019pim as a Candidate Moderately Relativistic Outflow Open
Classical gamma-ray bursts (GRBs) have two distinct emission episodes: prompt emission from ultrarelativistic ejecta and afterglow from shocked circumstellar material. While both components are extremely luminous in known GRBs, a variety o…
View article: Windows on the Universe: Establishing the Infrastructure for a Collaborative Multi-messenger Ecosystem
Windows on the Universe: Establishing the Infrastructure for a Collaborative Multi-messenger Ecosystem Open
In this White Paper, we present recommendations for the scientific community and funding agencies to foster the infrastructure for a collaborative multi-messenger and time-domain astronomy (MMA/TDA) ecosystem. MMA/TDA is poised for breakth…
View article: A Search for Relativistic Ejecta in a Sample of ZTF Broad-lined Type Ic Supernovae
A Search for Relativistic Ejecta in a Sample of ZTF Broad-lined Type Ic Supernovae Open
The dividing line between gamma-ray bursts (GRBs) and ordinary stripped-envelope core-collapse supernovae (SNe) is yet to be fully understood. Observationally mapping the variety of ejecta outcomes (ultrarelativistic, mildly relativistic, …
View article: Characterizing Gravitational Wave Detector Networks: From A$^\sharp$ to Cosmic Explorer
Characterizing Gravitational Wave Detector Networks: From A$^\sharp$ to Cosmic Explorer Open
Gravitational-wave observations by the Laser Interferometer Gravitational-Wave Observatory (LIGO) and Virgo have provided us a new tool to explore the Universe on all scales from nuclear physics to the cosmos and have the massive potential…
View article: SN2019wxt: An Ultrastripped Supernova Candidate Discovered in the Electromagnetic Follow-up of a Gravitational Wave Trigger
SN2019wxt: An Ultrastripped Supernova Candidate Discovered in the Electromagnetic Follow-up of a Gravitational Wave Trigger Open
We present optical, radio, and X-ray observations of a rapidly evolving transient SN2019wxt (PS19hgw), discovered during the search for an electromagnetic counterpart to the gravitational-wave (GW) trigger S191213g. Although S191213g was n…
View article: Cosmic Explorer: A Submission to the NSF MPSAC ngGW Subcommittee
Cosmic Explorer: A Submission to the NSF MPSAC ngGW Subcommittee Open
Gravitational-wave astronomy has revolutionized humanity's view of the universe, a revolution driven by observations that no other field can make. This white paper describes an observatory that builds on decades of investment by the Nation…
View article: A Search for Kilonova Radio Flares in a Sample of Swift/BAT Short Gamma-Ray Bursts
A Search for Kilonova Radio Flares in a Sample of Swift/BAT Short Gamma-Ray Bursts Open
The multimessenger detection of GW170817 showed that binary neutron star (BNS) mergers are progenitors of (at least some) short gamma-ray bursts (GRBs), and that short GRB jets (and their afterglows) can have structures (and observational …
View article: Collapsars as Sites of r-process Nucleosynthesis: Systematic Near-Infrared Follow-up of Type Ic-BL Supernovae
Collapsars as Sites of r-process Nucleosynthesis: Systematic Near-Infrared Follow-up of Type Ic-BL Supernovae Open
One of the open questions following the discovery of GW170817 is whether neutron star mergers are the only astrophysical sites capable of producing $r$-process elements. Simulations have shown that 0.01-0.1M$_\odot$ of $r$-process material…
View article: A search for relativistic ejecta in a sample of ZTF broad-lined Type Ic supernovae
A search for relativistic ejecta in a sample of ZTF broad-lined Type Ic supernovae Open
The dividing line between gamma-ray bursts (GRBs) and ordinary stripped-envelope core-collapse supernovae (SNe) is yet to be fully understood. Observationally mapping the variety of ejecta outcomes (ultra-relativistic, mildly-relativistic …
View article: GW170817 4.5 Yr After Merger: Dynamical Ejecta Afterglow Constraints
GW170817 4.5 Yr After Merger: Dynamical Ejecta Afterglow Constraints Open
GW170817 is the first binary neutron star (NS) merger detected in gravitational waves (GWs) and photons, and so far remains the only GW event of its class with a definitive electromagnetic counterpart. Radio emission from the structured je…
View article: AT2019wxt: An ultra-stripped supernova candidate discovered in electromagnetic follow-up of a gravitational wave trigger
AT2019wxt: An ultra-stripped supernova candidate discovered in electromagnetic follow-up of a gravitational wave trigger Open
We present optical, radio and X-ray observations of a rapidly-evolving transient AT2019wxt (PS19hgw), discovered during the search for an electromagnetic (EM) counterpart to the gravitational-wave (GW) trigger S191213g (LIGO Scientific Col…
View article: Radio Constraints on r-process Nucleosynthesis by Collapsars
Radio Constraints on r-process Nucleosynthesis by Collapsars Open
The heaviest elements in the universe are synthesized through rapid neutron capture ( r -process) in extremely neutron-rich outflows. Neutron star mergers were established as an important r -process source through the multimessenger observ…
View article: GW170817 4.5 years after merger: Dynamical ejecta afterglow constraints
GW170817 4.5 years after merger: Dynamical ejecta afterglow constraints Open
GW170817 is the first binary neutron star (NS) merger detected in gravitational waves (GWs) and photons, and so far remains the only GW event of its class with a definitive electromagnetic (EM) counterpart. Radio emission from the structur…
View article: Target-of-opportunity Observations of Gravitational-wave Events with Vera C. Rubin Observatory
Target-of-opportunity Observations of Gravitational-wave Events with Vera C. Rubin Observatory Open
The discovery of the electromagnetic counterpart to the binary neutron star (NS) merger GW170817 has opened the era of gravitational-wave multimessenger astronomy. Rapid identification of the optical/infrared kilonova enabled a precise loc…
View article: Radio Observations of SN2004dk with VLITE Confirm Late-time Rebrightening
Radio Observations of SN2004dk with VLITE Confirm Late-time Rebrightening Open
The study of stripped-envelope core-collapse supernovae (SNe), with evidence for strong interaction of SN ejecta with the circumstellar medium (CSM), provides insights into the pre-supernova progenitor, and a fast-forwarded view of the pro…
View article: The Panchromatic Afterglow of GW170817: The Full Uniform Data Set, Modeling, Comparison with Previous Results, and Implications
The Panchromatic Afterglow of GW170817: The Full Uniform Data Set, Modeling, Comparison with Previous Results, and Implications Open
We present the full panchromatic afterglow light-curve data of GW170817, including new radio data as well as archival optical and X-ray data, between 0.5 and 940 days post-merger. By compiling all archival data and reprocessing a subset of…