12 citations · 46 across the 22 of their papers we have counts for
23 papers
Probing the QPO and spectro-temporal evolution of MAXI J1750-327 with XPoSat during its first detected outburst : Constraints on black-hole mass and spin
Meghamani Haldar, Biki Ram, Shubhrangshu Ghosh +3
We present a comprehensive timing and broadband spectral study of the newly discovered black hole low-mass X-ray binary candidate MAXI J1750-327 during its August 2026 outburst, us…
Search for UHE gamma photons in cosmic rays by studying the geomagnetic influence on air-shower muons
Animesh Basak, Meghamani Haldar, Kishor Chaudhury +1
A major challenge in ground-based ultra-high-energy gamma-ray observations remains in discriminating sporadic gamma-ray signals from a huge background of cosmic-ray events. To achi…
Broadband Spectral Analysis of 1ES2344+514: A Multi-epoch study
Kishor Chaudhury, Abhradeep Roy, Varsha R. Chitnis +2
We present the results of the multi-epoch broadband spectral study of 1ES 2344+514 and study the evolution of physical parameters. We used nearly simultaneous data obtained from 20…
A new basic air shower observable sensitive to the cosmic-ray elemental mass
Animesh Basak, Rajat K. Dey
Based on a Monte Carlo simulation study of vertical extensive air showers (EAS) at the KASCADE location we introduce a new simple observable (in short ) - th…
Sagittarius as a plausible source candidate for PeV neutrinos
Sabyasachi Ray, Rajat K. Dey
We propose that the recently observed diffuse neutrinos by IceCube with energies above 1 PeV might have originated from Sagittarius located in the galactic dis…
The shape of the electron and muon lateral distribution functions of extensive air showers
Animesh Basak, Rajat K. Dey
The lateral density data obtained for different secondaries of an extensive air shower (EAS) from an array of detectors are usually described by some suitable lateral density funct…
Probing the mass composition of primary cosmic rays from the effect of the geomagnetic field on EAS muons: A simulation study
Rajat K. Dey
The distribution of the muon content of highly inclined Monte Carlo cosmic ray showers is affected by the influence of Earth's geomagnetic field. It is found that the shapes of the…
Behaviour of the lateral shower age of cosmic ray extensive air showers
Rajat K. Dey, Animesh Basak
Some simple arguments are introduced for a possible explanation of the behavior of the lateral shower age of proton-initiated showers. The corresponding analytical treatment based…
Diffuse flux of PeV neutrinos from centrifugally accelerated protons in active galactic nuclei
Rajat K. Dey, Animesh Basak, Sabyasachi Ray
Evidence for high-energy astrophysical PeV neutrinos has been found in the IceCube experiment from an analysis with a 7.5 year (2010 - 2017) data. Active galactic nuclei (AGN) are…
Probing the magnitude of asymmetries in the lateral density distribution of electrons in EAS
Animesh Basak, Rajat K. Dey
The lateral density distributions (LDD) of inclined cosmic ray air shower are asymmetric and the corresponding iso-density contours are of increasing eccentric ellipses with zenith…
Explaining the characteristics of lateral shower age of cosmic ray extensive air showers
Rajat K. Dey, Animesh Basak
A simple analytical argument is proposed for a possible explanation of the characteristics of the lateral shower age () of proton ()/nuclei-initiated showers. The analytical…
Newly born extragalactic millisecond pulsars as efficient emitters of PeV neutrinos
Rajat K. Dey, Animesh Basak, Sabyasachi Ray +1
The origins of the diffuse flux of cosmogenic PeV neutrinos detected in the IceCube experiment during 2010 - 2017 remain unidentified. A population of extragalactic newly born fast…
Local shower age and segmented slope parameters of lateral density distributions of cosmic ray shower particles
Rajat K. Dey
The paper describes lateral density distributions of electrons and muons of cosmic ray extensive air showers (EAS) in the energy regime of the KASCADE experiment. Potential EAS obs…
Searching for correlations of geomagnetic activities with high-energy EAS muons
Rajat K. Dey, Sabyasachi Ray, Sandip Dam
The paper aims to explore the asymmetry of the muon content of non-vertical and very high energy Monte Carlo showers due to the influence of Earth's geomagnetic field. Simulations…
A novel approach for deducing the mass composition of cosmic rays from lateral densities of EAS particles
Rajat K Dey, Sandip Dam, Animesh Basak
A Monte Carlo (MC) simulation study of cosmic ray (CR) extensive air showers (EAS) has been carried out in the energy regime of the KASCADE experiment. From the characteristics of…
Determination of the mass and energy of primary cosmic rays above 100 TeV
R. K. Dey, S. Dam, S. Ray +2
This analysis aims to determine the mass composition and energy of cosmic rays at energies above 100 TeV based on the lateral distribution of extensive air showers. Here, we propos…
PeV neutrinos from local magnetars
Rajat K. Dey
The paper estimates the flux of PeV neutrinos from magnetar polar caps, assuming that ions/protons are injected, and accelerated in these regions and interact with the radiative ba…
Slope of the lateral density function of extensive air showers around the knee region as an indicator of shower age
Rajat K. Dey, Sandip Dam
Analyzing simulated extensive air shower (EAS) events generated with the Monte Carlo code CORSIKA, this paper critically studies the characteristics of lateral distribution of elec…
A proposed method for measurement of cosmic-ray chemical composition based on geomagnetic spectroscopy
Rajat K Dey, Sandip Dam
The effect of the geomagnetic Lorentz force on the muon component of extensive air shower (EAS) has been studied in a Monte Carlo generated simulated data sample. This geomagnetic…
Searching for PeV neutrinos from photomeson interactions in magnetars
Rajat K. Dey, Sabyasachi Ray, Sandip Dam
In this paper we estimate the flux of PeV neutrinos and gamma-rays from magnetar polar caps, assuming that ions/protons are injected, and accelerated in these regions and interact…
Search for gamma-ray induced showers from the lateral distribution of electrons in EAS
R. K. Dey, A. Bhadra
Distinguishing -ray and hadron initiated extensive air showers (EAS) based on lateral distribution of electrons has been studied by detailed Monte Carlo (MC) simulations. The po…
Behaviour of the EAS Age Parameter in the Knee Energy Region
R. K. Dey, A. Bhadra, J. N. Capdevielle
Analyzing simulated EAS events generated with the CORSIKA code, the characteristics of lateral distribution of electrons in EAS around the knee energy region of the primary energy…
TeV neutrinos and gamma rays from pulsars
A. Bhadra, R. K. Dey
Recent studies suggest that pulsars could be strong sources of TeV muon neutrinos provided positive ions are accelerated by pulsar polar caps to PeV energies. In such a situation m…