https://hackerpaper.kaipfister.de/p/2503.04009/Collected HN comments and submissions linking this paper.enMon, 02 Nov 2026 11:16:22 GMThttps://news.ycombinator.com/item?id=43391257urn:hackerpapers:mention:2503.04009:43391257Mon, 17 Mar 2025 18:18:10 GMT<p>&quot;Italian astronomers report the detection of a new X-ray binary (XRB), which has received the designation 4XMM J181330.1-17511 (J1813 for short). The newfound object represents the rare subclass of XRBs known as supergiant fast X-ray transients. The discovery is detailed in a research paper published March 6 on the arXiv preprint server.&quot; The paper is at https://arxiv.org/abs/2503.04009. I&#x27;ve been long fascinated by odd astronomical items like this, particularly since I heard Joe Taylor play an audio tape of various frequencies that quasars pulsed at.</p><p><a href="https://hackerpaper.kaipfister.de/p/2503.04009/">Paper and discussion history</a>. A mention is not an endorsement.</p>astro-ph.HE