3 papers
astro-ph.CO2025
Deep uGMRT observations for enhanced calibration of 21 cm arrays -- I. First image and source catalogue
Khandakar Md Asif Elahi, Samir Choudhuri, Nirupam Roy +3
Radio-interferometric arrays require very precise calibration to detect the Epoch of Reionization 21-cm signal. A remarkably complete and accurate sky model is therefore needed in…
astro-ph.IM2024
Reliability of in-band and broadband spectral index measurement: systematic study of the effect of signal to noise for uGMRT data
Md Rashid, Nirupam Roy, J. D. Pandian +4
Low radio frequency spectral index measurements are a powerful tool to distinguish between different emission mechanisms and, in turn, to understand the nature of the sources. Besi…
astro-ph.GA2024
Exploring neutral hydrogen in the radio MOlecular Hydrogen Emission Galaxies (MOHEGs) and prospects with the SKA
Sai Wagh, Mamta Pandey-Pommier, Nirupam Roy +6
The empirical studies of cold gas content serve as an essential aspect in comprehending the star formation activities and evolution in galaxies. However, it is not straightforward…