{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2014:JFCLK6LLBZNHXYDVZFBI4S6HZK","short_pith_number":"pith:JFCLK6LL","schema_version":"1.0","canonical_sha256":"4944b5796b0e5a7be075c9428e4bc7caa247fade498af2d5378536fdfb1da75d","source":{"kind":"arxiv","id":"1412.0660","version":1},"attestation_state":"computed","paper":{"title":"Performance characterization of a broadband vector Apodizing Phase Plate coronagraph","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"F. Snik, G. P. P. L. Otten, M. A. Kenworthy, M. J. Escuti, M. N. Miskiewicz","submitted_at":"2014-12-01T21:00:06Z","abstract_excerpt":"One of the main challenges for the direct imaging of planets around nearby stars is the suppression of the diffracted halo from the primary star. Coronagraphs are angular filters that suppress this diffracted halo. The Apodizing Phase Plate coronagraph modifies the pupil-plane phase with an anti-symmetric pattern to suppress diffraction over a 180 degree region from 2 to 7 {\\lambda}/D and achieves a mean raw contrast of 10^-4 in this area, independent of the tip-tilt stability of the system. Current APP coronagraphs implemented using classical phase techniques are limited in bandwidth and supp"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1412.0660","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-12-01T21:00:06Z","cross_cats_sorted":[],"title_canon_sha256":"c9d8a18d686096db6049e76e22dcafe9ff53ce512d83459389c7e5f3699cadd7","abstract_canon_sha256":"20d0f544886e773d34997892250f58f70c8d433450bdf04ab6b5b6a22e24f6ef"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:32:21.430624Z","signature_b64":"C8qNrPqqSi/redkfPeNp631Lj9VYqQ+ps54fcbvve1aDceSvm4AXNHWqDfH4VqsQ2GnYVc0pvCTMSdHMxK0qAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4944b5796b0e5a7be075c9428e4bc7caa247fade498af2d5378536fdfb1da75d","last_reissued_at":"2026-05-18T02:32:21.430174Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:32:21.430174Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Performance characterization of a broadband vector Apodizing Phase Plate coronagraph","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"F. Snik, G. P. P. L. Otten, M. A. Kenworthy, M. J. Escuti, M. N. Miskiewicz","submitted_at":"2014-12-01T21:00:06Z","abstract_excerpt":"One of the main challenges for the direct imaging of planets around nearby stars is the suppression of the diffracted halo from the primary star. Coronagraphs are angular filters that suppress this diffracted halo. The Apodizing Phase Plate coronagraph modifies the pupil-plane phase with an anti-symmetric pattern to suppress diffraction over a 180 degree region from 2 to 7 {\\lambda}/D and achieves a mean raw contrast of 10^-4 in this area, independent of the tip-tilt stability of the system. Current APP coronagraphs implemented using classical phase techniques are limited in bandwidth and supp"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.0660","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":""},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1412.0660","created_at":"2026-05-18T02:32:21.430244+00:00"},{"alias_kind":"arxiv_version","alias_value":"1412.0660v1","created_at":"2026-05-18T02:32:21.430244+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.0660","created_at":"2026-05-18T02:32:21.430244+00:00"},{"alias_kind":"pith_short_12","alias_value":"JFCLK6LLBZNH","created_at":"2026-05-18T12:28:33.132498+00:00"},{"alias_kind":"pith_short_16","alias_value":"JFCLK6LLBZNHXYDV","created_at":"2026-05-18T12:28:33.132498+00:00"},{"alias_kind":"pith_short_8","alias_value":"JFCLK6LL","created_at":"2026-05-18T12:28:33.132498+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/JFCLK6LLBZNHXYDVZFBI4S6HZK","json":"https://pith.science/pith/JFCLK6LLBZNHXYDVZFBI4S6HZK.json","graph_json":"https://pith.science/api/pith-number/JFCLK6LLBZNHXYDVZFBI4S6HZK/graph.json","events_json":"https://pith.science/api/pith-number/JFCLK6LLBZNHXYDVZFBI4S6HZK/events.json","paper":"https://pith.science/paper/JFCLK6LL"},"agent_actions":{"view_html":"https://pith.science/pith/JFCLK6LLBZNHXYDVZFBI4S6HZK","download_json":"https://pith.science/pith/JFCLK6LLBZNHXYDVZFBI4S6HZK.json","view_paper":"https://pith.science/paper/JFCLK6LL","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1412.0660&json=true","fetch_graph":"https://pith.science/api/pith-number/JFCLK6LLBZNHXYDVZFBI4S6HZK/graph.json","fetch_events":"https://pith.science/api/pith-number/JFCLK6LLBZNHXYDVZFBI4S6HZK/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/JFCLK6LLBZNHXYDVZFBI4S6HZK/action/timestamp_anchor","attest_storage":"https://pith.science/pith/JFCLK6LLBZNHXYDVZFBI4S6HZK/action/storage_attestation","attest_author":"https://pith.science/pith/JFCLK6LLBZNHXYDVZFBI4S6HZK/action/author_attestation","sign_citation":"https://pith.science/pith/JFCLK6LLBZNHXYDVZFBI4S6HZK/action/citation_signature","submit_replication":"https://pith.science/pith/JFCLK6LLBZNHXYDVZFBI4S6HZK/action/replication_record"}},"created_at":"2026-05-18T02:32:21.430244+00:00","updated_at":"2026-05-18T02:32:21.430244+00:00"}