{"paper":{"title":"Vortex-phase filtering technique for extracting spatial information from unresolved sources","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Garreth J. Ruane, Grover A. Swartzlander Jr, Jiaxuan Han, Prachyathit Kanburapa","submitted_at":"2014-01-30T12:52:19Z","abstract_excerpt":"A white light vortex coronagraph was used to experimentally achieve sub-resolution detection. The angular location of the centroid, $\\gamma$, and the angular extent of circular pinhole sources, $\\Theta$, were measured to within errors of $\\delta\\gamma = \\pm0.015\\,\\lambda/D$ and $\\delta\\Theta = \\pm0.026\\,\\lambda/D$. This technique has two advantages over conventional imaging: simple power measurements are made and shorter exposure times may be required to achieve a sufficient signal-to-noise ratio."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1401.7831","kind":"arxiv","version":4},"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"}