Publications (13)
The Swift short gamma-ray burst rate density: implications for binary neutron star merger rates
David Coward, Eric Howell, Tsvi Piran +6
Short gamma-ray bursts (SGRBs) observed by {\it Swift} are potentially revealing the first insight into cataclysmic compact object mergers. To ultimately acquire a fundamental unde…
Stochastic Gravitational Wave Background from Coalescing Binary Black Holes
Xing-Jiang Zhu, Eric Howell, Tania Regimbau +2
We estimate the stochastic gravitational wave (GW) background signal from the field population of coalescing binary stellar mass black holes (BHs) throughout the Universe. This stu…
The Swift Gamma-Ray Burst redshift distribution: selection biases and optical brightness evolution at high-z?
David Coward, Eric Howell, Marica Branchesi +4
We employ realistic constraints on astrophysical and instrumental selection effects to model the Gamma-Ray Burst (GRB) redshift distribution using {\it Swift} triggered redshift sa…
Selection biases in the gamma ray burst E -- L correlation
David Coward, Eric Howell, Linfeng Wan +1
Gamma ray burst (GRB) optical and X-ray afterglow luminosity is expected to correlate with the GRB isotropic equivalent kinetic energy of the outflow in the standard synchrotron mo…
The All-sky Medium Energy Gamma-ray Observatory eXplorer (AMEGO-X) Mission Concept
Regina Caputo, Marco Ajello, Carolyn Kierans +52
The All-sky Medium Energy Gamma-ray Observatory eXplorer (AMEGO-X) is designed to identify and characterize gamma rays from extreme explosions and accelerators. The main science th…
The Swift short gamma-ray burst rate density: prospects for detecting binary neutron star mergers by aLIGO
David Coward, Eric Howell, Tsvi Piran +6
Presently only 30% of short gamma ray bursts (SGRBs) have accurate redshifts, and this sample is highly biased by the limited sensitivity of {\it Swift} to detect SGRBs. We account…
Observational upper limits on the gravitational wave production of core collapse supernovae
Xing-Jiang Zhu, Eric Howell, David Blair
The upper limit on the energy density of a stochastic gravitational wave (GW) background obtained from the two-year science run (S5) of the Laser Interferometer Gravitational-wave…
Ground Based Gravitational Wave Astronomy in the Asian Region
Vaishali Adya, Matthew Bailes, Carl Blair +9
The current gravitational wave detectors have identified a surprising population of heavy stellar mass black holes, and an even larger population of coalescing neutron stars. The f…
The detection efficiency of on-axis short gamma ray burst optical afterglows triggered by aLIGO/Virgo
David Coward, Marica Branchesi, Eric Howell +2
Assuming neutron star (NS) or neutron star/stellar-mass black hole (BH) mergers as progenitors of the short gamma ray bursts, we derive and demonstrate a simple analysis tool for m…
The Swift Gamma-Ray Burst redshift distribution: selection biases or rate evolution at high-z?
David Coward, Eric Howell, Marica Branchesi +2
We employ realistic constraints on selection effects to model the Gamma-Ray Burst (GRB) redshift distribution using {\it Swift} triggered redshift samples acquired from optical aft…
Multi-Messenger Astrophysics with THESEUS in the 2030s
Riccardo Ciolfi, Giulia Stratta, Marica Branchesi +63
Multi-messenger astrophysics is becoming a major avenue to explore the Universe, with the potential to span a vast range of redshifts. The growing synergies between different probe…
Single Gaussian Process Method for Arbitrary Tokamak Regimes with a Statistical Analysis
Jarrod Leddy, Sandeep Madireddy, Eric Howell +1
Gaussian Process Regression (GPR) is a Bayesian method for inferring profiles based on input data. The technique is increasing in popularity in the fusion community due to its many…
The mystery of the missing GRB redshifts
David Coward, Eric Howell, Marica Branchesi +2
It is clear that optical selection effects have distorted the "true" GRB redshift distribution to its presently observed biased distribution. We constrain a statistically optimal m…