A5089747447- Pulsars and Gravitational Waves Research
- Gamma-ray bursts and supernovae
- Geophysics and Gravity Measurements
- Astrophysical Phenomena and Observations
- Cosmology and Gravitation Theories
- Geophysics and Sensor Technology
- Astrophysics and Cosmic Phenomena
- High-pressure geophysics and materials
- Seismic Waves and Analysis
- Statistical and numerical algorithms
- Radio Astronomy Observations and Technology
- Radiomics and Machine Learning in Medical Imaging
- Advanced Frequency and Time Standards
- Astronomical Observations and Instrumentation
- Cold Atom Physics and Bose-Einstein Condensates
- Atomic and Subatomic Physics Research
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- earthquake and tectonic studies
- Magnetic confinement fusion research
- Seismology and Earthquake Studies
- Advanced Electrical Measurement Techniques
- Seismic Imaging and Inversion Techniques
- Magnetic Field Sensors Techniques
- Adaptive optics and wavefront sensing
Louisiana State University
2019-2024
Indiana University – Purdue University Indianapolis
2019
Indiana University School of Medicine
2019
California Institute of Technology
2017-2019
University of Wisconsin–Milwaukee
2014-2017
Fermi National Accelerator Laboratory
2016
University of Chicago
2016
Massachusetts Institute of Technology
2014
Yale University
2009
ABSTRACT The Advanced Laser Interferometer Gravitational-wave Observatory (LIGO) discovered gravitational waves (GWs) from a binary black hole merger in 2015 September and may soon observe signals neutron star mergers. There is considerable interest searching for their faint rapidly fading electromagnetic (EM) counterparts, though GW position uncertainties are as coarse hundreds of square degrees. Because LIGO’s sensitivity to stars limited the local universe, area on sky that must be...
We anticipate the first direct detections of gravitational waves (GWs) with Advanced LIGO and Virgo later this decade. Though groundbreaking technical achievement will be its own reward, a still greater prize could observations compact binary mergers in both electromagnetic channels simultaneously. During Virgo's two years operation, 2015 through 2016, we expect global GW detector array to improve sensitivity livetime expand from three detectors. model detection rate sky localization...
Advanced ground-based gravitational-wave (GW) detectors begin operation imminently. Their intended goal is not only to make the first direct detection of GWs, but also inferences about source systems. Binary neutron-star mergers are among most promising sources. We investigate performance parameter-estimation \edit{(PE)} pipeline that will be used during observing run Laser Interferometer Gravitational-wave Observatory (aLIGO) in 2015: we concentrate on ability reconstruct location sky,...
Calibration of the Advanced LIGO detectors is quantification detectors' response to gravitational waves. Gravitational waves incident on cause phase shifts in interferometer laser light which are read out as intensity fluctuations at detector output. Understanding this crucial producing accurate and precise wave strain data. Estimates binary black hole neutron star parameters tests general relativity require well-calibrated data, miscalibrations will lead biased results. We describe method...
This paper presents an adaptable, parallelizable method for subtracting linearly coupled noise from Advanced LIGO data. We explain the features developed to ensure that process is robust enough handle variability present in In this work, we target subtraction of due beam jitter, detector calibration lines, and mains power lines. demonstrate over entirety second observing run, resulting increases sensitivity comparable those reported previous targeted efforts. Over course see a 30% increase...
Inspiraling binary neutron stars are expected to be one of the most significant sources gravitational-wave signals for new generation advanced ground-based detectors. We investigate how well we could hope measure properties these binaries using Advanced LIGO detectors, which began operation in September 2015. study an astrophysically motivated population (binary components with masses $1.2~\mathrm{M}_\odot$--$1.6~\mathrm{M}_\odot$ and spins less than $0.05$) full analysis pipeline. While...
Advanced LIGO's raw detector output needs to be calibrated compute dimensionless strain h(t). Calibrated data is produced in the time domain using both a low-latency, online procedure and high-latency, offline procedure. The low-latency h(t) stream two stages, first of which performed on same computers that operate detector's feedback control system. This stage, referred as front-end calibration, uses infinite impulse response (IIR) filtering performs all operations at 16384 Hz digital...
Abstract Emerging molecular and clinical data suggest that ETS fusion prostate cancer represents a distinct subclass, driven most commonly by hormonally regulated promoter characterized an aggressive natural history. The study of the genomic landscape in light events is required to understand foundation this molecularly clinically subtype. We performed genome‐wide profiling 49 primary cancers identified 20 recurrent chromosomal copy number aberrations, mainly occurring as losses....
We report here the discovery by Intermediate Palomar Transient Factory (iPTF) of iPTF14yb, a luminous ($M_{r}\approx-27.8$ mag), cosmological (redshift 1.9733), rapidly fading optical transient. demonstrate, based on probabilistic arguments and comparison with broader population, that iPTF14yb is afterglow long-duration gamma-ray burst GRB 140226A. This marks first unambiguous prior to (and thus entirely independent of) an associated high-energy trigger. estimate rate iPTF14yb-like sources...
This is a supplement to the Letter of Singer et al. (https://arxiv.org/abs/1603.07333), in which we demonstrated rapid algorithm for obtaining joint 3D estimates sky location and luminosity distance from observations binary neutron star mergers with Advanced LIGO Virgo. We argued that combining reconstructed volumes positions redshifts possible host galaxies can provide large-aperture but small field view instruments manageable list targets search optical or infrared emission. In this...
Noise due to scattered light has been a frequent disturbance in the Advanced LIGO gravitational wave detectors, hindering detection of waves. The non stationary scatter noise caused by low frequency motion can be recognized as arches time-frequency plane channel. In this paper, we characterize scattering for LIGO's third observing run O3 from April, 2019 March, 2020. We find at least two different populations and investigate multiple origins one them well its mitigation. that relative...
Abstract There has been speculation about a class of relativistic explosions with an initial Lorentz factor Γ init smaller than that classical gamma-ray bursts (GRBs). These “dirty fireballs” would lack prompt GRB emission but could be pursued via their optical afterglow, appearing as transients fade overnight. Here we report search for such (that by 5- σ in magnitude overnight) four years archival photometric data from the intermediate Palomar Transient Factory (iPTF). Our criteria yielded...
2015 will see the first observations of Advanced LIGO and start gravitational-wave (GW) advanced-detector era. One most promising sources for ground-based GW detectors are binary neutron-star (BNS) coalescences. In order to use any detections astrophysics, we must understand capabilities our parameter-estimation analysis. By simulating GWs from an astrophysically motivated population BNSs, examine accuracy parameter inferences in early We find that sky location, which is important...
There is a clear need to develop dense, lithium intercalation oxides with > 200 mAh/g practical capacity. Today, nearly all high energy density cathodes for rechargeable batteries are well-ordered materials where and other cations occupy distinct sites. Cation-disordered generally disregarded because diffusion tends be limited in them. The recently demonstrated performance of Li 1.211 Mo 0.467 Cr 0.3 O 2 , achieving close 300 mAh/g, shows that can facile disordered [1] made us revisit the...