49 citations · 191 across the 11 of their papers we have counts for
11 papers
Monitoring the upper atmospheric temperature and interplanetary magnetic field with the GRAPES-3 muon telescope
S. Paul, K. P. Arunbabu, M. Chakraborty +17
We study the influence of variations in the upper atmospheric temperature and interplanetary magnetic field on the cosmic ray induced atmospheric muon flux measured by the GRAPES-3…
Dependence of the estimated electric potential in thunderstorms observed at GRAPES-3 on the hadronic interaction generators used in simulations
B. Hariharan, S. K. Gupta, Y. Hayashi +13
A potential difference of 1.3 Giga-Volts (GV) was inferred across a thundercloud using data from the GRAPES-3 muon telescope (G3MT) [1]. This was the first-ever estimation of gigav…
Small-scale cosmic ray anisotropy observed by the GRAPES-3 experiment at TeV energies
M. Chakraborty, S. Ahmad, A. Chandra +35
GRAPES-3 is a mid-altitude (2200 m) and near equatorial ( North) air shower array, overlapping in its field of view for cosmic ray observations with experiments that…
UVIT-HST-Gaia-VISTA study of KRON 3 in the Small Magellanic Cloud: A cluster with an extended red clump in UV
P. K. Nayak, A. Subramaniam, S. Subramanian +6
We have demonstrated the advantage of combining multi-wavelength observations, from the ultraviolet (UV) to near-infrared, to study Kron 3, a massive star cluster in the Small Mage…
Energy sensitivity of the GRAPES-3 EAS array for primary cosmic ray protons
B. Hariharan, S. Ahmad, M. Chakraborty +23
Low energy ground-based cosmic ray air shower experiments generally have energy threshold in the range of a few tens to a few hundreds of TeV. The shower observables are measured i…
The angular resolution of GRAPES-3 EAS array after correction for the shower front curvature
V. B. Jhansi, S. Ahmad, M. Chakraborty +22
The angular resolution of an extensive air shower (EAS) array plays a critical role in determining its sensitivity for the detection of point -ray sources in the multi-TeV energ…
Measurement of the Electrical Properties of a Thundercloud Through Muon Imaging by the GRAPES-3 Experiment
B. Hariharan, A. Chandra, S. R. Dugad +19
The GRAPES-3 muon telescope located in Ooty, India records rapid (10 min) variations in the muon intensity during major thunderstorms. Out of a total of 184 thunderstorms rec…
Star Clusters in the Magellanic Clouds - II. Age-Dating, Classification and Spatio-Temporal Distribution of the SMC Clusters
P. K. Nayak, A. Subramaniam, S. Choudhury +1
Aim: We aim to estimate the age and reddening parameters of already identified star clusters within the Small Magellanic Cloud (SMC) in a consistent way using available photometric…
Was the cosmic ray burst detected by the GRAPES-3 on 22 June 2015 caused by transient weakening of geomagnetic field or by an interplanetary anisotropy?
P. K. Mohanty, K. P. Arunbabu, T. Aziz +19
The GRAPES-3 muon telescope in Ooty, India had claimed detection of a 2 hour (h) high-energy (20 GeV) burst of galactic cosmic-rays (GCRs) through a 50 surge in GeV muo…
Star Clusters in the Magellanic Clouds-1: Parameterisation and Classification of 1072 Clusters in the LMC
P. K. Nayak, A. Subramaniam, S. Choudhury +2
We have introduced a semi-automated quantitative method to estimate the age and reddening of 1072 star clusters in the Large Magellanic Cloud (LMC) using the Optical Gravitational…
Forbush decreases and turbulence levels at CME fronts
Prasad Subramanian, H. M. Antia, S. R. Dugad +13
We seek to estimate the average level of MHD turbulence near coronal mass ejection (CME) fronts as they propagate from the Sun to the Earth. We examine the cosmic ray data from the…