2 papers
astro-ph.HE2026
A NuSTAR Reflection-Spectroscopy Survey of Cygnus X-1
Kshitij Duraphe, Kartik Mandar, Chooda Khanal +1
Relativistic-reflection measurements of Cygnus X-1 disagree on the extent of disk truncation and commonly infer supersolar iron abundances. We analyze a selected sample of 26 archi…
astro-ph.HE2025
State-Dependent X-ray Variability in Cygnus X-1: A 12-Year NuSTAR Timing Study of Accretion Flow Geometry
Kshitij Duraphe, Kartik Mandar, Chooda Khanal +6
We present a comprehensive timing analysis of the black hole X-ray binary Cygnus X-1 using 26 NuSTAR observations spanning 2012-2024, providing the most detailed characterization t…