{"paper":{"title":"Quasi-periodicities of PKS 2155-304","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.HE","authors_text":"Aldo Treves, Angela Sandrinelli, Stefano Covino","submitted_at":"2014-07-31T20:06:10Z","abstract_excerpt":"We have searched for periodicities in our VRIJHK photometry of PKS 2155-304, which covers the years 2005-2012. A peak of the Fourier spectrum with high significance is found at T$\\sim$315 days, confirming the recent findings by \\cite{Zhang2014}. The examination of the gamma-ray light curves from the\\textit{ Fermi} archives yields a significant signal at $\\sim$ 2T, which, while nominally significant, involves data spanning only $\\sim$ 6T. Assuming a black hole mass of $10^{9}\\ M_{\\odot}$ the Keplerian distance corresponding to the quasi-period T is $\\sim10^{16}$ cm, about 50 Schwarzschild radii"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1408.0015","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}