A5061650600- Pulsars and Gravitational Waves Research
- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Geophysics and Gravity Measurements
- High-pressure geophysics and materials
- Astrophysics and Cosmic Phenomena
- Superconducting Materials and Applications
- GNSS positioning and interference
- Particle accelerators and beam dynamics
- earthquake and tectonic studies
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Atomic and Subatomic Physics Research
- Astronomical Observations and Instrumentation
Louisiana State University
2023-2024
University of Oklahoma
2023
Progress in gravitational-wave astronomy depends upon having sensitive detectors with good data quality. Since the end of LIGO-Virgo-KAGRA third Observing run March 2020, detector-characterization efforts have lead to increased sensitivity detectors, swifter validation candidates and improved tools used for data-quality products. In this article, we discuss these detail their impact on our ability detect study gravitational-waves. These include multiple instrumental investigations that led...
ABSTRACT We present ultraviolet (UV) to near-infrared (NIR) observations and analysis of the nearby Type Ia supernova SN 2021fxy. Our include UV photometry from Swift/UVOT, spectroscopy HST/STIS, high-cadence optical with Swope 1-m telescope capturing intranight rises during early light curve. Early B − V colours show 2021fxy is first ‘shallow-silicon’ (SS) follow a red-to-blue evolution, compared other SS objects which blue earliest observations. Comparisons spectroscopically normal SNe HST...
ABSTRACT Type Ia supernovae (SNe Ia) are important cosmological probes and contributors to galactic nucleosynthesis, particularly of the iron group elements. To improve both their reliability as understand chemical evolution, it is vital binary progenitor system explosion mechanism. The classification SNe into Branch groups has led some understanding similarities differences among varieties observed Ia. defined by pseudo-equivalent widths two prominent Si ii lines, leading four distinct...
As gravitational-wave observations expand in scope and detection rate, the data analysis infrastructure must be modernized to accommodate rising computational demands ensure sustainability. We present a scalable search pipeline which modernizes GstLAL by adapting core filtering engine PyTorch framework, enabling flexible execution on both Central Processing Units (CPUs) Graphics (GPUs). Offline results same 8.8 day stretch of public indicate that adaptation demonstrate comparable...
The gravitational wave detectors used by the LIGO Scientific Collaboration, and Virgo Collaboration are incredibly sensitive instruments which frequently detect non-stationary, non-Gaussian noise transients. iDQ is a statistical inference framework leverages use of auxiliary degrees freedom monitored in to identify such In this work, we describe improvements pipeline made between third fourth observing run LIGO-Virgo-KAGRA (LVK) collaboration, show performance these changes. We find that...
Matched-filtering searches for gravitational-wave signals from compact binary mergers employ template banks which are a collection of modeled waveforms described by unique intrinsic parameters. We present two designed low-latency and archive sub-solar mass (SSM) in data the fourth observing run LIGO-Virgo-KAGRA, demonstrate efficacy via simulated signals. Further, we introduce set modifications to geometric, manifold algorithm that allow method work exceedingly low component masses necessary...
Type Ia supernovae (SNe Ia) are important cosmological probes and contributors to galactic nucleosynthesis, particularly of the iron group elements. To improve both their reliability as understand chemical evolution, it is vital binary progenitor system explosion mechanism. The classification SNe into Branch groups has led some understanding similarities differences among varieties observed Ia. However, partly due small sample size, little work been done on broad-line or 02bo group. We...