21 cm observations: calibration, strategies, observables
Abstract
This chapter aims to provide a review of the basics of 21 cm interferometric observations and its methodologies. A summary of the main concepts of radio interferometry and their connection with the 21 cm observables - power spectra and images - is presented. I then provide a review of interferometric calibration and its interplay with foreground separation, including the current open challenges in calibration of 21 cm observations. Finally, a review of 21 cm instrument designs in the light of calibration choices and observing strategies follows.
Cite
@article{arxiv.1909.11938,
title = {21 cm observations: calibration, strategies, observables},
author = {G. Bernardi},
journal= {arXiv preprint arXiv:1909.11938},
year = {2019}
}
Comments
To appear as a book chapter in The Cosmic 21-cm Revolution: Charting the first billion years of our Universe, Ed Andrei Mesinger (Bristol: IOP Publishing Ltd) AAS-IOP ebooks http://www.iopscience.org/books/aas