65 citations · 195 across the 16 of their papers we have counts for
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Towards precision tests of general relativity with black hole X-ray reflection spectroscopy
Ashutosh Tripathi, Sourabh Nampalliwar, Askar B. Abdikamalov +5
Astrophysical black hole systems are the ideal laboratories for testing Einstein's theory of gravity in the strong field regime. We have recently developed a framework which uses t…
Detection of a quasi-periodic oscillation in gamma-ray light curve of the high redshift blazar B2 1520+31
Alok C. Gupta, Ashutosh Tripathi, Paul J. Wiita +3
We detected a possible quasi-periodic oscillation (QPO) of ~ 71 days in the 0.1 -- 300 GeV gamma-ray Fermi-LAT light curve of the high redshift flat spectrum radio quasar B2 1520+3…
Possible ~ 1 hour quasi-periodic oscillation in narrow-line Seyfert 1 galaxy MCG--06--30--15
Alok C. Gupta, Ashutosh Tripathi, Paul J. Wiita +3
We found a possible ~ 1 hour quasi-periodic oscillation (QPO) in a ~ 55 ks X-ray observation of the narrow-line Seyfert 1 galaxy MCG--06--30--15 made with the XMM-Newton EPIC/pn de…
Testing General Relativity with X-ray Reflection Spectroscopy of a 'Bare' Active Galactic Nucleus
Ashutosh Tripathi
Einstein's gravity has been extensively tested in the weak field regime, primarily with experiments in the Solar System and observations of binary pulsars, and current data agree w…
RELXILL_NK: a relativistic reflection model for testing Einstein's gravity
Cosimo Bambi, Askar B. Abdikamalov, Dimitry Ayzenberg +6
Einstein's theory of general relativity was proposed over 100 years ago and has successfully passed a large number of observational tests in the weak field regime. However, the str…
Testing the Kerr nature of the supermassive black hole in Ark 564
Ashutosh Tripathi, Sourabh Nampalliwar, Askar B. Abdikamalov +3
Einstein's theory of general relativity has been extensively tested in weak gravitational fields, mainly with experiments in the Solar System and observations of radio pulsars, and…