https://hackerpaper.kaipfister.de/p/1801.06160/Collected HN comments and submissions linking this paper.enMon, 02 Nov 2026 11:16:22 GMThttps://news.ycombinator.com/item?id=30329460urn:hackerpapers:mention:1801.06160:30329460Mon, 14 Feb 2022 08:02:29 GMT<p>The state of the art observatory for ultra high energy cosmic rays is the Pierre Auger Observatory in Argentina (auger.org). Unfortunately the funds for building a 7x larger northern observatory in Colorado were scraped but the NSF during the crisis in 2008. :( The PAO published an article on the highest energy arrival directions in 2007 (https://arxiv.org/abs/0712.2843) and I was very sad that I wasn&#x27;t on the author list (yet) at the time since I hadn&#x27;t been around for a full year. The discovery was a correlation in arrival directions with the known location of supermassive black holes in…</p><p><a href="https://hackerpaper.kaipfister.de/p/1801.06160/">Paper and discussion history</a>. A mention is not an endorsement.</p>astro-ph.HE