@article {2012A\&A...541A.135M,
	title = {{Over-resolution of compact sources in interferometric observations}},
	journal = {Astronomy and Astrophysics},
	volume = {541},
	year = {2012},
	month = {may},
	pages = {A135},
	abstract = {We review the effects of source size in interferometric observations and focus on the cases of very compact sources. If a source is extremely compact and/or weak (such that it is impossible to detect signatures of source structure in the visibilities), we describe a test of hypothesis that can be used to set a strong upper limit to the size of the source. We also estimate the minimum possible size of a source whose structure can still be detected by an interferometer (i.e., the maximum theoretical over-resolution power of an interferometer), which depends on the overall observing time, the compactness of the array distribution, and the sensitivity of the receivers. As a result, and depending on the observing frequency, the over-resolution power of forthcoming ultra-sensitive arrays, such as the Square Kilometer Array (SKA), may allow us to study the details of sources at angular scales as small as a few {$μ$}as.},
	keywords = {instrumentation: interferometers, techniques: high angular resolution, techniques: interferometric},
	doi = {10.1051/0004-6361/201118334},
	url = {http://adsabs.harvard.edu/abs/2012A\%26A...541A.135M},
	author = {Mart{\'\i}-Vidal, I. and M. A. P{\'e}rez-Torres and Lobanov, A.~P.}
}
