Stellar Intensity Interferometry Workshop 2025

Session

SII with IACTs

14 Oct 2025, 16:00

Research Campus Waischenfeld (Germany) of the Fraunhofer Society

6. Third-order correlation measurements with H.E.S.S. - an experimental study towards closure phases in intensity interferometry

Andreas Zmija (ECAP)

Invited talk

The simultaneous record of photons with at least three telescopes not only allows traditional two-photon correlations between pairs of telescopes, but also to explore three-photon correlations in the telescope triangle. Such measurements in principle enable measurements of the (cosine of the) closure phase, the sum of the interferometric phases in the triangle, and by that retrieve at least...