activity
19942026
most citedFresnel zone plate telescopes for X-ray imaging I: experiments with a quasi-parallel beam

11 citations · 42 across the 15 of their papers we have counts for

collaborators

14 papers

astro-ph.HE2026

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…

astro-ph.SR2026

Numerical study of multiple solar flare induced modulation of Very Low Frequency (VLF) diurnal profile

Sourav Palit, Subhajit Bhattacharyya, Taraknath Bera +1

Earth's ionosphere is a perpetual detector of ionizing radiation received from celestial objects, particularly the Sun. Solar ionizing radiation in the form of extreme ultraviolet…

astro-ph.HE2025

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…

astro-ph.EP2025

Revisiting the Orbital Dynamics of the Hot Jupiter WASP-12 b with New Transit Times

Shraddha Biswas, Ing-Guey Jiang, Li-Chin Yeh +10

In this study, we examine the transit timing deviations of the extensively studied hot Jupiter WASP-12 b using a comprehensive dataset of 391 transit light curves. The dataset incl…

astro-ph.HE2024

Black Hole Accretion is all about Sub-Keplerian Flows

Sandip Kumar Chakrabarti

We review the advantages of fitting with a Two Component Advective Flow (TCAF) which uses only four physical parameters. We then present the results of hydrodynamic simulations to…

astro-ph.HE2023

The accretion properties of a low-mass Active Galactic Nucleus: UGC 6728

Prantik Nandi, Sachindra Naik, Arka Chatterjee +3

We present a comprehensive analysis of approximately years () of X-ray observations of UGC~6728, a low-mass bare AGN, for the first time. Our study encompasses both…