{"paper":{"title":"First Resolution of Microlensed Images","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP","astro-ph.IM"],"primary_cat":"astro-ph.SR","authors_text":"A. M\\'erand, Andrew Gould (MPIA, B. J. Shappee, C.S. Kochanek, F. Delplancke-Str\\\"obele (ESO), G. W. Christie, J. L. Prieto, KASI, K. Z. Stanek, OSU), Ping Chen, Robert Mutel, R. Post, Subo Dong (KIAA-PKU), T. Natusch, Todd A. Thompson, T. W.-S. Holoien","submitted_at":"2018-09-21T18:00:01Z","abstract_excerpt":"We employ VLTI GRAVITY to resolve, for the first time, the two images generated by a gravitational microlens. The measurements of the image separation \\theta_{-,+}=3.78 +/- 0.05 mas, and hence the Einstein radius \\theta_E =1.87 +/- 0.03 mas, are precise. This demonstrates the robustness of the method, provided that the source is bright enough for GRAVITY (K <~ 10.5) and the image separation is of order or larger than the fringe spacing. When \\theta_E is combined with a measurement of the \"microlens parallax\" \\pi_E, the two will together yield the lens mass and lens-source relative parallax and"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.08243","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":""},"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"}