https://hackerpaper.kaipfister.de/p/1510.05675/Collected HN comments and submissions linking this paper.enMon, 02 Nov 2026 11:16:22 GMThttps://news.ycombinator.com/item?id=17519298urn:hackerpapers:mention:1510.05675:17519298Thu, 12 Jul 2018 22:54:43 GMT<p>If anyone&#x27;s interested in other unusual (i.e. other than an optical imaging telescope) detectors, have a look at Imaging Atmospheric Cherenkov Telescopes [0]. More details can be found e.g. in [1]. TL;DR: how to detect a very high-energy gamma-ray photon? Either with an orbital observatory (but these have limited size); or let the photon hit upper atmosphere (at a few tens of km), create (together with some atmospheric nucleus) a fast electron-positron pair, which through additional interactions eventually causes a narrow cone of Cherenkov light to shine all the way down to the ground (having…</p><p><a href="https://hackerpaper.kaipfister.de/p/1510.05675/">Paper and discussion history</a>. A mention is not an endorsement.</p>astro-ph.IM