{"paper":{"title":"Highly Variable $\\gamma$-Ray Emission of CTD 135 and Implications for its Compact Symmetric Structure","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"En-Wei Liang (GXU), Hai-Ming Zhang (NJU), Jin Zhang (BIT), Ting-Feng Yi (YNNU), Xing Yang (GXU), Ying-Ying Gan (GXU), Yun-Feng Liang (GXU)","submitted_at":"2021-04-09T15:35:56Z","abstract_excerpt":"The $\\gamma$-ray emission properties of CTD 135, a typical compact symmetric object (CSO), are investigated with $\\sim$11-year Fermi/LAT observations. We show that it has bright and significantly variable GeV emission, with the $\\gamma$-ray luminosity of $L_{\\gamma}\\sim10^{47}$ erg s$^{-1}$ and a variation index of TS$_{\\rm var}=1002$. A quasi-periodic oscillation (QPO) with a periodicity of $\\sim$460 days is detected in the global 95\\% false-alarm level. These $\\gamma$-ray emission features are similar to that of blazars. Its broadband spectral energy distribution (SED) can be attributed to t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2104.04436","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2104.04436/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"}