7 papers
X-ray Activity of the RS CVn-type Star σ Gem with the First-Year Observations of Einstein Probe
Xuan Mao, Giuseppina Micela, Fabio Favata +3
Context. Stellar flares are energetic events driven by the sudden release of magnetic energy in the stellar atmosphere. Studying these flares is crucial for understanding their imp…
Temporal Variation of the Coronal Radius Parameter in a Jetted Tidal Disruption Event: Swift J1644+57
Arka Chatterjee, Kimitake Hayasaki, Prantik Nandi +5
Tidal Disruption Events are exotic astrophysical phenomena where matter from a star or the interstellar medium is captured by a supermassive black hole. The process liberates enorm…
Probing burst-disc interaction and disc reflection in SAX J1808.43658 with NICER, XMM-Newton, and NuSTAR
Manoj Mandal, Sachindra Naik, Birendra Chhotaray
We performed a comprehensive study of thermonuclear bursts from the millisecond X-ray pulsar SAX J1808.43658 with XMM-Newton and NICER. We report the results from the analysis o…
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…
A multi-wavelength study of nearby starburst galaxy M 82
Nilkanth Vagshette, Satish S. Sonkamble, Madhav Patil +2
We present a multi-wavelength study of the nearby starburst galaxy M 82 by combining high-resolution Far-ultraviolet (FUV) imaging from the Ultra-Violet Imaging Telescope (UVIT) on…
Discovery of burst oscillations in the newly discovered millisecond X-ray pulsar SRGA J144459.2604207
Manoj Mandal, Sachindra Naik
Burst oscillations during thermonuclear X-ray bursts are powered by thermonuclear energy on the neutron star (NS) surface and typically occur close to the spin frequency of the NS.…