{"paper":{"title":"HALO II: Constraining Hubble constant $H_{0}$ through continuum delay fitting of Fairall 9","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","gr-qc","hep-ph","hep-th"],"primary_cat":"astro-ph.GA","authors_text":"Alberto Floris, Amit Kumar Mandal, Bart{\\l}omiej Zgirski, B. M. Peterson, Bo\\.zena Czerny, Cezary Ga{\\l}an, Francisco Pozo Nu\\~nez, Gergely Hajdu, Grzegorz Pietrzy\\'nski, Henryka Netzel-I{\\l}kiewicz, Karolina B\\k{a}kowska, Marek G\\'orski, Mary Loli Mart\\'inez-Aldama, Michal Dov\\v{c}iak, Michal Zaja\\v{c}ek, Miko{\\l}aj Ka{\\l}uszy\\'nski, Miros{\\l}aw Kicia, Mohammad Hassan Naddaf, Paulina Karczmarek, Pierre Kervella, Piotr Wielg\\'orski, Rados{\\l}aw Smolec, R. Edelson, Ricardo Salinas, Shivangi Pandey, Swayamtrupta Panda, Vikram Kumar Jaiswal, Vladimir Karas, Weronika Narloch, Wojciech Pych, Wolfgang Gieren","submitted_at":"2026-06-25T15:55:37Z","abstract_excerpt":"The Hubble tension remains one of the most significant unresolved problems in modern cosmology. A key question is whether it may arise from underestimated systematic uncertainties in the different measurement techniques. In this context, new independent methods are of exceptional importance. We therefore pursue a novel approach to determining the Hubble constant, $H_{0}$ based on continuum time delay and spectral energy distribution (SED) modeling in active galactic nuclei (AGNs). Unlike conventional techniques, this method is entirely independent of the cosmic distance ladder and does not req"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.27195","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/2606.27195/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"}