Journal article

Effects of model incompleteness on the drift-scan calibration of radio telescopes

BK Gehlot, DC Jacobs, JD Bowman, N Mahesh, SG Murray, M Kolopanis, AP Beardsley, Z Abdurashidova, JE Aguirre, P Alexander, ZS Ali, Y Balfour, G Bernardi, TS Billings, RF Bradley, P Bull, J Burba, S Carey, CL Carilli, C Cheng Show all

Monthly Notices of the Royal Astronomical Society | Oxford University Press (OUP) | Published : 2021

Abstract

Precision calibration poses challenges to experiments probing the redshifted 21-cm signal of neutral hydrogen from the Cosmic Dawn and Epoch of Reionization (z ∼30-6). In both interferometric and global signal experiments, systematic calibration is the leading source of error. Though many aspects of calibration have been studied, the overlap between the two types of instruments has received less attention. We investigate the sky based calibration of total power measurements with a HERA dish and an EDGES-style antenna to understand the role of autocorrelations in the calibration of an interferometer and the role of sky in calibrating a total power instrument. Using simulations we study variou..

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