4 papers
Accretion dynamics and coronal geometry in Mrk 530: Insights from 24 years of X-ray monitoring
Priyadarshee P. Dash, Prantik Nandi, Sachindra Naik +2
We present a long-term broadband study of the Seyfert galaxy Mrk~530 spanning 24 yr (2001--2024). The source remains largely stable across epochs, except in 2018, when a poss…
Evolution of Accretion Properties in Mrk 1040 using long-term X-ray Observations
Prantik Nandi, Narendranath Layek, Sandip K Chakrabarti +2
We present a comprehensive long-term, multi-epoch spectral and timing study of the Seyfert 1 Active Galactic Nucleus (AGN) Mrk~1040, utilizing X-ray observations spanning from 2009…
Discovery of Changing-Look behavior in AGN NGC 3822: A long-term multiwavelength study
Narendranath Layek, Prantik Nandi, Sachindra Naik +7
We present a comprehensive long-term multi-wavelength study of the active galactic nucleus (AGN) NGC 3822, based on 17 years (2008 to 2025) of X-ray, ultraviolet (UV), and optical…
A long-term study of Mrk 50 : Appearance and disappearance of soft excess
Narendranath Layek, Prantik Nandi, Sachindra Naik +1
We present an extensive temporal and spectral study of the Seyfert 1 AGN Mrk 50 using 15 years (2007-2022) of multiwavelength observations from XMM-Newton, Swift, and NuSTAR for th…