{"paper":{"title":"Unravelling the Innermost Jet Structure of OJ 287 with the First GMVA+ALMA Observations","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.HE","authors_text":"Achamveedu Gopakumar, Alan P. Marscher, Andrei Lobanov, Antonio Fuentes, Eduardo Ros, E. Traianou, Gabriele Bruni, Geoffrey Crew, Guang-Yao Zhao, Ilje Cho, Ivan Marti-Vidal, Jae-Young Kim, Jongho Park, Jose L. Gomez, Jun Yi Koay, Kazunori Akiyama, Keiichi Asada, Lankeswar Dey, Laurent Loinard, Lindy Blackburn, Michael Janssen, Rocco Lico, Rohan Dahale, Roman Gold, Rusen Lu, Sara Issaoun, Sera Markoff, Shoko Koyama, Silke Britzen, S. Komossa, Svetlana G. Jorstad, Teresa Toscano, Thomas P. Krichbaum, Tuomas Savolainen, Yosuke Mizuno, Yuri Y. Kovalev","submitted_at":"2022-05-01T20:29:42Z","abstract_excerpt":"We present the first very-long-baseline interferometric (VLBI) observations of the blazar OJ287 carried out jointly with the Global Millimeter VLBI Array (GMVA) and the phased Atacama Large Millimeter/submillimeter Array (ALMA) at 3.5 mm on April 2, 2017. Participation of phased-ALMA not only has improved the GMVA north-south resolution by a factor of ~3, but also has enabled fringe detection with signal-to-noise ratios up to 300 at baselines longer than 2 G{\\lambda}. The high sensitivity has motivated us to image the data with the newly developed regularized maximum likelihood imaging methods"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2205.00554","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/2205.00554/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"}