5 papers
Study of Solar Energetic Particles: their Source Regions, Flares and CMEs during Solar Cycles 23-24
Raj Kumar, Ramesh Chandra, Bimal Pande +1
In this work, we examine the association between solar active regions and 152 solar flares, coronal mass ejections, and solar energetic particle (SEP) events over solar cycles 23-2…
Spectro-Polarimetric Study of Weakly Magnetized Neutron Star X-ray binary GX 349+2
Raj Kumar, Subhasish Das
We report the first spectro-polarimetric investigation of the bright Z-type source GX 349+2 using simultaneous observations of \textit{IXPE}, \textit{NuSTAR} and \textit{Swift/XRT}…
Variability study of classical supergiant X-ray binary 4U 1907+09 using NuSTAR
Raj Kumar, Sayantan Bhattacharya, Sudip Bhattacharyya +1
We investigate the X-ray variability of the supergiant X-ray binary 4U 1907+09 using the new NuSTAR observation of 2024. The source had a relatively stable flux level during previo…
Very High-energy Gamma-Ray Episodic Activity of Radio Galaxy NGC 1275 in 2022-2023 Measured with MACE
S. Godambe, N. Mankuzhiyil, C. Borwankar +37
The radio galaxy NGC 1275, located at the central region of Perseus cluster, is a well-known very high-energy (VHE) gamma-ray emitter. The Major Atmospheric Cherenkov Experiment Te…
Characteristics of SEPs during Solar Cycle 21-24
Raj Kumar, Ramesh Chandra, Bimal Pande +1
The study of the solar energetic particle events (SEPs) and their association with solar flares and other activities are very crucial to understand the space weather. Keeping this…