A. Samajdar
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View article: Neural likelihood estimators for flexible gravitational wave data analysis
Neural likelihood estimators for flexible gravitational wave data analysis Open
In this paper, we develop a Neural Likelihood Estimator and apply it to analyse real gravitational-wave (GW) data for the first time. We assess the usability of neural likelihood for GW parameter estimation and report the parameter space w…
View article: Null-stream-based third-generation-ready glitch mitigation for gravitational wave measurements
Null-stream-based third-generation-ready glitch mitigation for gravitational wave measurements Open
Gravitational Wave (GW) detectors routinely encounter transient noise bursts, known as glitches, which are caused by either instrumental or environmental factors. Due to their high occurrence rate, glitches can overlap with GW signals, as …
View article: Possible causes of false general relativity violations in gravitational wave observations
Possible causes of false general relativity violations in gravitational wave observations Open
General relativity (GR) has proven to be a highly successful theory of gravity since its inception. The theory has thrivingly passed numerous experimental tests, predominantly in weak gravity, low relative speeds, and linear regimes, but a…
View article: A morphology-independent search for gravitational wave echoes in data from the first and second observing runs of Advanced LIGO and Advanced Virgo
A morphology-independent search for gravitational wave echoes in data from the first and second observing runs of Advanced LIGO and Advanced Virgo Open
Gravitational wave echoes have been proposed as a smoking-gun signature of exotic compact objects with near-horizon structure. Recently there have been observational claims that echoes are indeed present in stretches of data from Advanced …
View article: Empirical tests of the black hole no-hair conjecture using gravitational-wave observations
Empirical tests of the black hole no-hair conjecture using gravitational-wave observations Open
We show that second-generation gravitational-wave detectors at their design sensitivity will allow us to directly probe the ringdown phase of binary black hole coalescences. This opens the possibility to test the so-called black hole no-ha…
View article: A morphology-independent data analysis method for detecting and characterizing gravitational wave echoes
A morphology-independent data analysis method for detecting and characterizing gravitational wave echoes Open
The ability to directly detect gravitational waves has enabled us to\nempirically probe the nature of ultra-compact relativistic objects. Several\nalternatives to the black holes of classical general relativity have been\nproposed which do…
View article: Parametrized tests of the strong-field dynamics of general relativity using gravitational wave signals from coalescing binary black holes: Fast likelihood calculations and sensitivity of the method
Parametrized tests of the strong-field dynamics of general relativity using gravitational wave signals from coalescing binary black holes: Fast likelihood calculations and sensitivity of the method Open
Thanks to the recent discoveries of gravitational wave signals from binary black hole mergers by Advanced Laser Interferometer Gravitational Wave Observatory and Advanced Virgo, the genuinely strong-field dynamics of spacetime can now be p…
View article: Projected constraints on the dispersion of gravitational waves using advanced ground- and space-based interferometers
Projected constraints on the dispersion of gravitational waves using advanced ground- and space-based interferometers Open
Certain alternative theories of gravity predict that gravitational waves will\ndisperse as they travel from the source to the observer. The recent binary\nblack hole observations by Advanced-LIGO have set limits on a modified\ndispersion r…