A5056443037- 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
- Atomic and Subatomic Physics Research
- Astronomical Observations and Instrumentation
- Astrophysics and Cosmic Phenomena
- High-pressure geophysics and materials
- Seismic Waves and Analysis
- Radio Astronomy Observations and Technology
- Seismology and Earthquake Studies
- Magnetic confinement fusion research
- Mechanical and Optical Resonators
- Statistical and numerical algorithms
- Model Reduction and Neural Networks
- Meteorological Phenomena and Simulations
- Astronomy and Astrophysical Research
- Scientific Measurement and Uncertainty Evaluation
- GNSS positioning and interference
- Electricity Theft Detection Techniques
- Time Series Analysis and Forecasting
- Cold Atom Physics and Bose-Einstein Condensates
- Software Engineering Techniques and Practices
Pennsylvania State University
2019-2024
California Institute of Technology
2023-2024
LIGO Scientific Collaboration
2024
Park University
2019-2020
The Laser Interferometer Gravitational Wave Observatory (LIGO) has been directly detecting gravitational waves from compact binary mergers since 2015. We report on the first use of squeezed vacuum states in direct measurement with Advanced LIGO H1 and L1 detectors. This achievement is culmination decades research to implement gravitational-wave During ongoing O3 observation run, are improving sensitivity interferometers signals above 50 Hz by up 3 dB, thereby increasing expected detection...
On April 1st, 2019, the Advanced Laser Interferometer Gravitational-Wave Observatory (aLIGO), joined by Virgo detector, began third observing run, a year-long dedicated search for gravitational radiation. The LIGO detectors have achieved higher duty cycle and greater sensitivity to waves than ever before, with Hanford achieving angle-averaged binary neutron star coalescences distance of 111 Mpc, Livingston 134 Mpc factors 74.6% 77.0% respectively. improvement in stability is result several...
The characterization of the Advanced LIGO detectors in second and third observing runs has increased sensitivity instruments, allowing for a higher number detectable gravitational-wave signals, provided confirmation all observed events. In this work, we present methods used to characterize curate publicly available datasets, including strain data quality products. We describe essential role these datasets LIGO-Virgo Collaboration analyses gravitational-waves from both transient persistent...
After their successful first observing run (September 12, 2015 - January 2016), the Advanced LIGO detectors were upgraded to increase sensitivity for second (November 30, 2016 August 26, 2017). The Virgo detector joined on 1, 2017. We discuss updates that happened during this period in GstLAL-based inspiral pipeline, which is used detect gravitational waves from coalescence of compact binaries both low latency and an offline configuration. These include deployment a zero-latency whitening...
The GstLAL library, derived from Gstreamer and the LIGO Algorithm Library, supports a stream-based approach to gravitational-wave data processing. Although was primarily designed search for signatures of merging black holes neutron stars, it has also contributed other searches, calibration, detector-characterization efforts. played an integral role in all LIGO-Virgo collaboration detections, its low-latency configuration enabled rapid electromagnetic follow-up dozens compact binary candidates.
Abstract Binary neutron stars (BNSs) will spend ≃10–15 minutes in the band of Advanced Laser Interferometer Gravitational-Wave Observatory (LIGO) and Virgo detectors at design sensitivity. Matched-filtering gravitational-wave (GW) data could principle accumulate enough signal-to-noise ratio (S/N) to identify a forthcoming event tens seconds before companions collide merge. Here we report on testing an early-warning GW detection pipeline. Early-warning alerts can be produced for sources that...
Gravitational waves searches for compact binary mergers with LIGO and Virgo are presently a two stage process. First, gravitational wave signal is identified. Then, an exhaustive search over possible parameters performed. It critical that the identification efficient in order to maximize number of sources Initial signals happens real-time which requires less than one second computational time must be used each data collected. In contrast, subsequent parameter estimation may require hundreds...
The motion of a mechanical object, even human-sized should be governed by the rules quantum mechanics. Coaxing them into state is, however, difficult because thermal environment masks any signature object's motion. also effects proposed modifications mechanics at large mass scales. We prepared center-of-mass 10-kilogram oscillator in with an average phonon occupation 10.8. reduction temperature, from room temperature to 77 nanokelvin, is commensurate 11 orders-of-magnitude suppression...
Starting from May 2023, the LIGO Scientific, Virgo and KAGRA Collaboration has been conducting fourth observing run with improved detector sensitivities an expanded network including KAGRA. Accordingly, it is vital to optimize detection algorithm of low-latency search pipelines, increasing their gravitational waves compact binary coalescences. In this work, we discuss several new features developed for ranking statistics GstLAL-based inspiral pipeline, which mainly consist signal...
GstLAL is a stream-based matched-filtering search pipeline aiming at the prompt discovery of gravitational waves from compact binary coalescences such as mergers black holes and neutron stars. Over past three observation runs by LIGO, Virgo, KAGRA Collaboration, has participated in several tens wave discoveries. The fourth observing run (O4) set to begin May 2023 expected see many new interesting signals which will inform our understanding astrophysics cosmology. We describe current...
Multimessenger searches for binary neutron star (BNS) and star-black hole (NSBH) mergers are currently one of the most exciting areas astronomy. The search joint electromagnetic neutrino counterparts to gravitational wave (GW)s has resumed with ALIGO’s, AdVirgo’s KAGRA’s fourth observing run (O4). To support this effort, public semiautomated data products sent in near real-time include localization source properties guide complementary observations. In preparation O4, we have conducted a...
Matched-filtering gravitational-wave search pipelines identify signals by computing correlations, i.e., signal-to-noise ratios, between detector data and template waveforms. Intrinsic parameters, the component masses spins, of waveforms are often stored in "template banks," construction a densely populated bank is essential for some pipelines. This paper presents that currently being used GstLAL-based compact binary pipeline fourth observing run LIGO, Virgo, KAGRA collaboration, was...
Precession in binary black holes (BBH) is caused by the failure of hole spins to be aligned and its study can open up new perspectives gravitational wave astronomy, providing, among other advancements, a precise measure distance an accurate characterization BBH spins. However, detecting precessing signals highly nontrivial task, as standard matched filtering pipelines for searches are built on many assumptions that do not hold case. This work details upgrades made GstLAL pipeline facilitate...
Gravitational Wave interferometers achieve their profound sensitivity by combining a Michelson interferometer with optical cavities, suspended masses, and now, squeezed quantum states of light. These modify the measurement process LIGO, VIRGO GEO600 to reduce noise that masks astrophysical signals; thus, improvements squeezing are essential further expand our gravitational view universe. Further reducing will require both lowering decoherence from losses as well more sophisticated...
Gravitational-wave detectors are exquisitely sensitive instruments and routinely enable ground-breaking observations of novel astronomical phenomena. However, they also witness non-stationary, non-Gaussian noise that can be mistaken for astrophysical sources, lower detection confidence, or simply complicate the extraction signal parameters from noisy data. To address this, we present iDQ, a supervised learning framework to autonomously detect artifacts in gravitational-wave based only on...
Abstract We present a search for gravitational waves from double neutron star binaries inspirals in Advanced Laser Interferometer Gravitational-Wave Observatory’s (LIGO’s) first observing run. The considers narrow range of binary chirp masses motivated by the population known neutron-star nearby universe. This differs previously published results providing most sensitive survey stars LIGO’s run within this mass range, and also including times when only one two LIGO detectors was operation...
We demonstrate a new geometric method for fast template placement searches gravitational waves from the inspiral, merger and ringdown of compact binaries. The is based on binary tree decomposition bank parameter space into nonoverlapping hypercubes. use numerical approximation signal overlap metric at center each hypercube to estimate number templates required cover determine whether further split hypercube. As long as expected in given cube greater than threshold, we along its longest edge...
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...
Leveraging the features of GstLAL pipeline, we present results a matched filtering search for asymmetric binary black hole systems with heavily misaligned spins in LIGO and Virgo data taken during third observing run. Our target show strong imprints precession whereas current searches have nonoptimal sensitivity detecting them. After measuring improvement brought by our over standard spin-aligned searches, report detection 30 gravitational wave events already discovered latest version...
The recently published GWTC-1 (Abbott B P et al (LIGO Scientific Collaboration and Virgo Collaboration) 2019 Phys. Rev. X 9 031040)—a journal article summarizing the search for gravitational waves (GWs) from coalescing compact binaries in data produced by LIGO-Virgo network of ground-based detectors during their first second observing runs—quoted estimates rates binary neutron star, star black hole binary, mergers, as well assigned probabilities astrophysical origin various significant...
We describe the methods used to construct aligned-spin template bank of gravitational waveforms by Gstreamer and Ligo Algorithm Library (GstLAL)-based pipeline analyze data from second observing run Advanced Laser Interferometer Gravitational Wave Observatory (LIGO) first Virgo. The expands upon parameter space covered during LIGO's run, including coverage for merging compact binary systems with total mass between $2\text{ }\text{ }{\mathrm{M}}_{\ensuremath{\bigodot}}$ $400\text{ ratios 1...
Teleseismic, or distant, earthquakes regularly disrupt the operation of ground--based gravitational wave detectors such as Advanced LIGO. Here, we present \emph{EQ mode}, a new global control scheme, consisting an automated sequence optimized filters that reduces and coordinates motion seismic isolation platforms during earthquakes. This, in turn, suppresses differential interferometer arms with respect to one another, resulting reduction DARM signal at frequencies below 100\,mHz. Our method...
Developing sustainable software for the scientific community requires expertise in engineering and domain science. This can be challenging due to unique needs of software, insufficient resources practices community, complexity developing evolving contexts. While open-source partially address these concerns, it introduce complicating dependencies delay development. These issues reduced if scientists developers collaborate. We present a case study wherein from SuperNova Early Warning System...