{"paper":{"title":"First Resolution of Microlensed Images of a Binary-Lens Event","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.GA","astro-ph.IM"],"primary_cat":"astro-ph.SR","authors_text":"A. M\\'erand, Andreas Eckart, Andrew P. Gould, Andrzej Udalski, Anthony Berdeu, Antonia Drescher, Bruno Lopez, Calvin Sykes, Catherine Dougados, Christian Straubmeier, Christopher S. Kochanek, Daryl Santos, David A. H. Buckley, Denis Defr\\`ere, Dieter Lutz, Diogo C. Ribeiro, Eckhard Sturm, Felix Mang, Felix Widmann, Florentin Millour, Frank Eisenhauer, Fr\\'ed\\'eric Vincent, Gernot Hei{\\ss}el, Grant Christie, Guillaume Bourdarot, Guy Perrin, Helmut Feuchtgruber, Hugo Nowacki, I. B. Thompson, James Leftley, Janez Kos, Jean-Baptiste Le Bouquin, Jean-Philippe Berger, Jinyi Shangguan, Jonas Sauter, Joss Bland-Hawthorn, Jules Scigliuto, J. Woillez, Karim Abd El Dayem, Karine Perraut, Laura Kreidberg, Linda Tacconi, Mathias Nowak, Mathis Houlle, Matteo Sadun Bordoni, Matthias Subroweit, Maximilian Fabricius, Miguel Montarg\\`es, Natascha M. F\\\"orster Schreiber, Nicolas Pourre, Olivier Lai, Paulo Garcia, Pierre Kervella, Pierre-Olivier Petrucci, Przemek Mr\\'oz, Reinhard Genzel, Richard I. Davies, Romain Laugier, Romain Petrov, Sanjib Sharma, Sebastian H\\\"onig, Sebastian Rabien, Stefan Gillessen, Subo Dong, Sven Buder, Sylvestre Lacour, Sylvie Robbe-Dubois, Taro T. Shimizu, Thiam-Guan Tan, Thibaut Paumard, Thomas Bensby, Thomas Ott, Tim Natusch, Wolfgang Brandner, Zexuan Wu","submitted_at":"2024-09-19T18:00:02Z","abstract_excerpt":"We resolve the multiple images of the binary-lens microlensing event ASASSN-22av using the GRAVITY instrument of the Very Large Telescope Interferometer (VLTI). The light curves show weak binary-lens perturbations, complicating the analysis, but the joint modeling with the VLTI data breaks several degeneracies, arriving at a strongly favored solution. Thanks to precise measurements of angular Einstein radius \\theta_E = 0.724 +/- 0.002 mas and microlens parallax, we determine that the lens system consists of two M dwarfs with masses of M_1 = 0.258 +/- 0.008 M_sun and M_2 = 0.130 +/- 0.007 M_sun"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2409.13015","kind":"arxiv","version":3},"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/2409.13015/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"}