M. Kovalam
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View article: Gravitational-wave matched filtering with variational quantum algorithms
Gravitational-wave matched filtering with variational quantum algorithms Open
In this paper, we explore the application of variational quantum algorithms designed for classical optimization to the problem of matched filtering in the detection of gravitational waves. Matched filtering for detecting gravitational wave…
View article: Low-latency gravitational wave alert products and their performance at the time of the fourth LIGO-Virgo-KAGRA observing run
Low-latency gravitational wave alert products and their performance at the time of the fourth LIGO-Virgo-KAGRA observing run Open
Multimessenger searches for binary neutron star (BNS) and neutron star-black hole (NSBH) mergers are currently one of the most exciting areas of astronomy. The search for joint electromagnetic and neutrino counterparts to gravitational wav…
View article: Rapid Localization of Gravitational Wave Sources from Compact Binary Coalescences Using Deep Learning
Rapid Localization of Gravitational Wave Sources from Compact Binary Coalescences Using Deep Learning Open
The mergers of neutron star–neutron star and neutron star–black hole binaries (NSBHs) are the most promising gravitational wave (GW) events with electromagnetic (EM) counterparts. The rapid detection, localization, and simultaneous multime…
View article: Low-latency gravitational wave alert products and their performance at the time of the fourth LIGO-Virgo-KAGRA observing run
Low-latency gravitational wave alert products and their performance at the time of the fourth LIGO-Virgo-KAGRA observing run Open
Multi-messenger searches for BNS and NSBH mergers are currently one of the most exciting areas of astronomy. The search for joint electromagnetic and neutrino counterparts to GWs has resumed with O4. To support this effort, public semi-aut…
View article: Test sets and results for paper 'Rapid localization of gravitational wave sources from compact binary coalescences using deep learning'
Test sets and results for paper 'Rapid localization of gravitational wave sources from compact binary coalescences using deep learning' Open
This folder contains the input data (signal-to-noise ratio time series for gravitational wave detections) and results (sky localization areas) obtained from the deep learning based sky localization model 'GW-SkyLocator', and the rapid onli…
View article: Test sets and results for paper 'Rapid localization of gravitational wave sources from compact binary coalescences using deep learning'
Test sets and results for paper 'Rapid localization of gravitational wave sources from compact binary coalescences using deep learning' Open
This folder contains the input data (signal-to-noise ratio time series for gravitational wave detections) and results (sky localization areas) obtained from the deep learning based sky localization model 'GW-SkyLocator', and the rapid onli…
View article: The most probable host of CHIME FRB 190425A, associated with binary neutron star merger GW190425, and a late-time transient search
The most probable host of CHIME FRB 190425A, associated with binary neutron star merger GW190425, and a late-time transient search Open
The identification and localization of fast radio bursts (FRBs) to their host galaxies have revealed important details about the progenitors of these mysterious, millisecond-long bursts of coherent radio emission. In this work, we study th…
View article: The most probable host of CHIME FRB 190425A, associated with binary neutron star merger GW190425, and a late-time transient search
The most probable host of CHIME FRB 190425A, associated with binary neutron star merger GW190425, and a late-time transient search Open
The identification and localization of Fast Radio Bursts to their host galaxies has revealed important details about the progenitors of these mysterious, millisecond-long bursts of coherent radio emission. In this work we study the most pr…
View article: An assessment of the Association Between a Fast Radio Burst and Binary Neutron Star Merger
An assessment of the Association Between a Fast Radio Burst and Binary Neutron Star Merger Open
Fast radio bursts (FRBs) are mysterious bright millisecond-duration radio bursts at cosmological distances. While young magnetars have been put forward as the leading source candidate, recent observations suggest there may be multiple FRB …
View article: Rapid localization of gravitational wave sources from compact binary coalescences using deep learning
Rapid localization of gravitational wave sources from compact binary coalescences using deep learning Open
The mergers of neutron star-neutron star and neutron star-black hole binaries are the most promising gravitational wave events with electromagnetic counterparts. The rapid detection, localization and simultaneous multi-messenger follow-up …
View article: Early Warnings of Binary Neutron Star Coalescence Using the SPIIR Search
Early Warnings of Binary Neutron Star Coalescence Using the SPIIR Search Open
Gravitational waves from binary neutron star mergers can be used as alerts to enable prompt follow-up observations. In particular, capturing prompt electromagnetic and astroparticle emissions from the moment of a binary merger presents uni…
View article: SPIIR online coherent pipeline to search for gravitational waves from compact binary coalescences
SPIIR online coherent pipeline to search for gravitational waves from compact binary coalescences Open
This paper presents the SPIIR pipeline used for public alerts during the third advanced LIGO and Virgo observation run (O3 run). The SPIIR pipeline uses infinite impulse response (IIR) filters to perform extremely low-latency matched filte…
View article: SPIIR online coherent pipeline to search for gravitational waves from compact binary coalescences
SPIIR online coherent pipeline to search for gravitational waves from compact binary coalescences Open
This paper presents the Summed Parallel Infinite Impulse Response (SPIIR) pipeline used for public alerts during the third advanced LIGO and Virgo observation run (O3 run). The SPIIR pipeline uses infinite impulse response (IIR) filters to…
View article: Early Warnings of Binary Neutron Star Coalescence using the SPIIR Search
Early Warnings of Binary Neutron Star Coalescence using the SPIIR Search Open
Gravitational waves from binary neutron star mergers can be used as alerts to enable prompt follow-up observations. In particular, capturing prompt electromagnetic and astroparticle emissions from the moment of a binary merger presents uni…
View article: Semianalytical approach for sky localization of gravitational waves
Semianalytical approach for sky localization of gravitational waves Open
Rapid sky localization of gravitational wave sources is crucial to enable prompt electromagnetic follow-ups. In this article, we present a novel semianalytical approach for sky localization of gravitational waves from compact binary coales…
View article: First Demonstration of Early Warning Gravitational-wave Alerts
First Demonstration of Early Warning Gravitational-wave Alerts Open
Gravitational-wave observations became commonplace in Advanced LIGO-Virgo’s recently concluded third observing run. 56 nonretracted candidates were identified and publicly announced in near real time. Gravitational waves from binary neutro…
View article: The SPIIR online coherent pipeline to search for gravitational waves from compact binary coalescences
The SPIIR online coherent pipeline to search for gravitational waves from compact binary coalescences Open
This paper presents the SPIIR pipeline used for public alerts during the third advanced LIGO and Virgo observation run (O3 run). The SPIIR pipeline uses infinite impulse response (IIR) filters to perform extremely low-latency matched filte…
View article: Using deep learning to localize gravitational wave sources
Using deep learning to localize gravitational wave sources Open
In this paper, we report on the construction of a deep Artificial Neural Network (ANN) to localize simulated gravitational wave signals in the sky with high accuracy. We have modelled the sky as a sphere and have considered cases where the…
View article: Using negative-latency gravitational wave alerts to detect prompt radio bursts from binary neutron star mergers with the Murchison Widefield Array
Using negative-latency gravitational wave alerts to detect prompt radio bursts from binary neutron star mergers with the Murchison Widefield Array Open
We examine how fast radio burst (FRB)-like signals predicted to be generated during the merger of a binary neutron star (BNS) may be detected in low-frequency radio observations triggered by the aLIGO/Virgo gravitational-wave detectors. Th…