Imaging Spatially Extended Objects with Interferometers: Mosaicking and the Short Spacing Correction

TL;DR

This paper discusses methods to improve imaging of extended astronomical objects by mosaicking interferometer data and combining it with single-dish observations, enhancing image sensitivity and fidelity.

Contribution

It explains the techniques and theoretical background for mosaicking and short spacing correction in interferometric imaging of extended objects.

Findings

Mosaicking improves imaging of extended sources.

Combining interferometer data with single-dish data enhances image quality.

Techniques for data analysis and theory are comprehensively explained.

Abstract

Interferometry is a powerful technique for making sensitive, high-fidelity images of the sky, but is limited in its ability to measure extended or diffuse emission. Better images of extended astronomical objects can be obtained by mosaicking together many pointings of the interferometer array. Even better images can be obtained by combining these data with data from a single-dish telescope. This lecture explains commonly practiced techniques for obtaining and analyzing these observations, and the theory behind them.