465 citations · 5k across the 107 of their papers we have counts for
12 papers · 1 filter
Detailed study of ELAIS N1 field with the uGMRT -- II. Source Properties and Spectral Variation Of Foreground Power Spectrum from 300-500 MHz Observations
Arnab Chakraborty, Nirupam Roy, Abhirup Datta +8
Understanding the low-frequency radio sky in depth is necessary to subtract foregrounds in order to detect the redshifted 21 cm signal of neutral hydrogen from the Cosmic Dawn, Epo…
Bayesian approach to constraining the properties of ionized bubbles during reionization
Raghunath Ghara, T. Roy Choudhury
A possible way to study the reionization of cosmic hydrogen is by observing the large ionized regions (bubbles) around bright individual sources, e.g., quasars, using the redshifte…
Three- and two-point spatial correlations of intergalactic medium at using projected quasar triplets
Soumak Maitra, Raghunathan Srianand, Patrick Petitjean +4
We present analysis of two- and three-point correlation functions of Ly forest (at ) using X-Shooter spectra of three background quasar triplets probing transvers…
Constraints on dark matter annihilation in dwarf spheroidal galaxies from low frequency radio observations
Arpan Kar, Sourav Mitra, Biswarup Mukhopadhyaya +2
We present the first observational limits on the predicted synchrotron signals from particle Dark Matter annihilation models in dwarf spheroidal galaxies at radio frequencies below…
Detailed study of the ELAIS N1 field with the uGMRT - I. Characterizing the 325 MHz foreground for redshifted 21 cm observations
Arnab Chakraborty, Abhirup Datta, Samir Choudhuri +8
In this first paper of the series, we present initial results of newly upgraded Giant Meterwave Radio Telescope (uGMRT) observation of European Large-Area ISO Survey-North 1 (ELAIS…
Cosmological implications of the composite spectra of galactic X-ray binaries constructed using MAXI data
Nazma Islam, Raghunath Ghara, Biswajit Paul +2
We have investigated the long term average spectral properties of galactic X-ray binaries in the energy range of 3-20 keV, using long term monitoring data from MAXI -Gas Slit Camer…