{"paper":{"title":"Constraining the PG 1553+113 binary hypothesis: interpreting hints of a new, 22-year period","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.HE","authors_text":"Alba Rico, Alberto Dominguez, John Ryan Westernacher-Schneider, Jonathan Zrake, Marco Ajello, Pablo Penil, Sagar Adhikari, Sara Buson","submitted_at":"2023-07-21T16:50:46Z","abstract_excerpt":"PG 1553+113 is a well-known blazar exhibiting evidence of a $\\sim\\! 2.2$-yr quasi-periodic oscillation (QPO) in radio, optical, X-ray, and $\\gamma$-ray bands. Since QPO mechanisms often predict multiple QPOs, we search for a second QPO in its historical optical light curve covering a century of observations. Despite challenging data quality issues, we find hints of a $21.8 \\pm 4.7$ yr oscillation. On its own, this $\\sim\\! 22$-yr period has a modest statistical significance of $1.6\\sigma$ when accounting for the look-elsewhere effect. However, the joint significance of both the $2.2$- and $22$-"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2307.11696","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2307.11696/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}