Instrumental Calibration for Observations of Redshifted 21-cm Signal from Neutral Hydrogen

Kumar, J and Dutta, P and Das, S and Roy, N (2020) Instrumental Calibration for Observations of Redshifted 21-cm Signal from Neutral Hydrogen. In: 2020 URSI Regional Conference on Radio Science, URSI-RCRS 2020, 12-14 February 2020, Varanasi; India.

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Abstract

We investigate the calibration requirements for high dynamic range observations in radio interferometric experiments. Particularly, we access the requirement of the time-dependent instrumental gain calibration for observations of faint diffused emission in the presence of compact and bright diffused sources in the sky. This is particularly important for the observation of the redshifted 21-cm signal from the neutral hydrogen at different stages of the evolution of the universe. Our results suggests an order of magnitude better calibration compared to what is achieved at present is required to estimate the power spectrum of the redshifted 21-cm signal. © 2020 Indian Radio Science Society.

Item Type:	Conference Paper
Publication:	2020 URSI Regional Conference on Radio Science, URSI-RCRS 2020 - Proceedings
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright of this article belongs to Institute of Electrical and Electronics Engineers Inc.
Keywords:	Calibration; Hydrogen, Different stages; Gain calibration; High dynamic range; Neutral hydrogen; Red-shifted; Time dependent, Red Shift
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	01 Jan 2021 11:14
Last Modified:	01 Jan 2021 11:14
URI:	http://eprints.iisc.ac.in/id/eprint/66625

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