Astrophysical measurements with the VERITAS Stellar Intensity Interferometer
July 22, 2019
July 02, 2021
Imaging Atmospheric Cherenkov Telescopes have long been viewed as potential light collectors to be used for long baseline optical intensity interferometry observations. Intensity interferometry, as implemented with Cherenkov telescopes, is well suited for studying the spatial structure of stars of O/B/A stellar types at short optical wavelengths. Such observations complement those with the current generation of optical amplitude interferometers, which are typically restricted to longer wavelengths. Dedicated intensity interferometry instrumentation has been developed for the VERITAS observatory with engineering tests and observations occurring since October 2018. In this presentation, the first results using two of the VERITAS telescopes, are reported. The system has already been extended to the two additional telescopes, enabling SII observations with all four VERITAS telescopes.
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