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gr-qc2025
Black-hole ringdown analysis with inspiral-merger informed templates and limitations of classical spectroscopy
Koustav Chandra, Juan Calderón Bustillo
The ringdown of a perturbed black hole consists of a superposition of quasi-normal modes (QNMs), with complex frequencies determined by the black hole's mass and spin, while phases…
gr-qc2025
Improving the detection significance of gravitational wave transient searches with CNN models
Johann Fernandes, Archana Pai, Koustav Chandra
Gravitational wave (GW) transient searches rely on signal-noise discriminators to distinguish astrophysical signals from noise artefacts. These discriminators are typically tuned t…