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gr-qc2026
Improved Constraints on Non-Kerr Deviations from Binary Black Hole Inspirals Using GWTC-4 Data
Debtroy Das, Swarnim Shashank, Cosimo Bambi
Gravitational wave (GW) observations of binary black hole (BBH) mergers provide a unique opportunity to probe the nature of spacetime in the strong-field and dynamical regime. We p…
astro-ph.HE2026
Modeling X-ray reflection spectra from disk returning radiation: Application to 4U 1630-47
Kostas Kourmpetis, Shafqat Riaz, Honghui Liu +6
Returning radiation is thought to play a key role in disk illumination of black-hole X-ray binaries in the high-soft state, yet it has not been fully incorporated into XSPEC reflec…