Experiments are in progress to prepare for intensity interferometry with arrays of air Cherenkov telescopes. At the Bonneville Seabase site, near Salt Lake City, a testbed observatory has been set up with two 3-m air Cherenkov telescopes on a 23-m baseline. Cameras are being constructed, with control electronics for either off- or online analysis of the data. At the Lund Observatory (Sweden), in Technion (Israel) and at the University of Utah (USA), laboratory intensity interferometers simulating stellar observations have been set up and experiments are in progress, using various analog and digital correlators, reaching 1.4 ns time resolution, to analyze signals from pairs of laboratory telescopes.
@article{arxiv.1009.5585,
title = {Stellar intensity interferometry: Experimental steps toward long-baseline observations},
author = {Stephan LeBohec and Ben Adams and Isobel Bond and Stella Bradbury and Dainis Dravins and Hannes Jensen and David B. Kieda and Derrick Kress and Edward Munford and Paul D. Nunez and Ryan Price and Erez Ribak and Joachim Rose and Harold Simpson and Jeremy Smith},
journal= {arXiv preprint arXiv:1009.5585},
year = {2015}
}