{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:XPKQIFQXRUYFFIP4RNLO7QE3T7","short_pith_number":"pith:XPKQIFQX","canonical_record":{"source":{"id":"1404.2845","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-04-10T15:20:35Z","cross_cats_sorted":[],"title_canon_sha256":"b17a8c4a462818e2246db534b1be743d06284c79280d3dca83d62b2e03a15a48","abstract_canon_sha256":"9b29249e304ac529ea8e2c6e8957c37c159491371384123031ddeae79af08620"},"schema_version":"1.0"},"canonical_sha256":"bbd50416178d3052a1fc8b56efc09b9fd2c6b47071d8e4b02d019372dc539955","source":{"kind":"arxiv","id":"1404.2845","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1404.2845","created_at":"2026-05-18T02:50:33Z"},{"alias_kind":"arxiv_version","alias_value":"1404.2845v1","created_at":"2026-05-18T02:50:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1404.2845","created_at":"2026-05-18T02:50:33Z"},{"alias_kind":"pith_short_12","alias_value":"XPKQIFQXRUYF","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_16","alias_value":"XPKQIFQXRUYFFIP4","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_8","alias_value":"XPKQIFQX","created_at":"2026-05-18T12:28:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:XPKQIFQXRUYFFIP4RNLO7QE3T7","target":"record","payload":{"canonical_record":{"source":{"id":"1404.2845","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-04-10T15:20:35Z","cross_cats_sorted":[],"title_canon_sha256":"b17a8c4a462818e2246db534b1be743d06284c79280d3dca83d62b2e03a15a48","abstract_canon_sha256":"9b29249e304ac529ea8e2c6e8957c37c159491371384123031ddeae79af08620"},"schema_version":"1.0"},"canonical_sha256":"bbd50416178d3052a1fc8b56efc09b9fd2c6b47071d8e4b02d019372dc539955","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:50:33.548385Z","signature_b64":"+Iff/sBdKcnJcPbhb82fXQf63xG2hwXdTo5defeE+K4yuXS9T6RWJZwD9Iwq3VOW5eWxGgCwIzB8K23BPWhIBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bbd50416178d3052a1fc8b56efc09b9fd2c6b47071d8e4b02d019372dc539955","last_reissued_at":"2026-05-18T02:50:33.547932Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:50:33.547932Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1404.2845","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:50:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8R/hnbKI4IOWy4ol+uxWNUifaWq6fZjUmjWfbOMzZHvvmrFPgKrN3dwqK/nJm4inWb/NjxA7kUVihH+q88zzAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T12:19:21.147396Z"},"content_sha256":"323d7eeaf91668dc561fff1325e261265642e2544c065b47020b4a8728f03887","schema_version":"1.0","event_id":"sha256:323d7eeaf91668dc561fff1325e261265642e2544c065b47020b4a8728f03887"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:XPKQIFQXRUYFFIP4RNLO7QE3T7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Apodized phase mask coronagraphs for arbitrary apertures. II. Comprehensive review of solutions for the vortex coronagraph","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Alexis Carlotti, Dimitri Mawet, Laurent Pueyo","submitted_at":"2014-04-10T15:20:35Z","abstract_excerpt":"With a clear circular aperture, the vortex coronagraph perfectly cancels an on-axis point source and offers a 0.9 or 1.75 lambda/D inner working angle for topological charge 2 or 4, respectively. Current and near-future large telescopes are on-axis, however, and the diffraction effects of the central obscuration, and the secondary supports are strong enough to prevent the detection of companions 1e-3 - 1e-5 as bright as, or fainter than, their host star. Recent advances show that a ring apodizer can restore the performance of this coronagraph by compensating for the diffraction effects of a ci"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1404.2845","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:50:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"g6c1gHLdoXgv0A2NQlvDmIiNJmI286Q2c+VO5u3iYkYou+EAaJ98+8ynleTUQFIgRDGDSEPqpWO9Bl/FA89gBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T12:19:21.147739Z"},"content_sha256":"21c4a5c7c3bc9b794c95241731ba98c38c7e62daca9ce823d3db960710f42db5","schema_version":"1.0","event_id":"sha256:21c4a5c7c3bc9b794c95241731ba98c38c7e62daca9ce823d3db960710f42db5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XPKQIFQXRUYFFIP4RNLO7QE3T7/bundle.json","state_url":"https://pith.science/pith/XPKQIFQXRUYFFIP4RNLO7QE3T7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XPKQIFQXRUYFFIP4RNLO7QE3T7/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-28T12:19:21Z","links":{"resolver":"https://pith.science/pith/XPKQIFQXRUYFFIP4RNLO7QE3T7","bundle":"https://pith.science/pith/XPKQIFQXRUYFFIP4RNLO7QE3T7/bundle.json","state":"https://pith.science/pith/XPKQIFQXRUYFFIP4RNLO7QE3T7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XPKQIFQXRUYFFIP4RNLO7QE3T7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:XPKQIFQXRUYFFIP4RNLO7QE3T7","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"9b29249e304ac529ea8e2c6e8957c37c159491371384123031ddeae79af08620","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-04-10T15:20:35Z","title_canon_sha256":"b17a8c4a462818e2246db534b1be743d06284c79280d3dca83d62b2e03a15a48"},"schema_version":"1.0","source":{"id":"1404.2845","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1404.2845","created_at":"2026-05-18T02:50:33Z"},{"alias_kind":"arxiv_version","alias_value":"1404.2845v1","created_at":"2026-05-18T02:50:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1404.2845","created_at":"2026-05-18T02:50:33Z"},{"alias_kind":"pith_short_12","alias_value":"XPKQIFQXRUYF","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_16","alias_value":"XPKQIFQXRUYFFIP4","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_8","alias_value":"XPKQIFQX","created_at":"2026-05-18T12:28:57Z"}],"graph_snapshots":[{"event_id":"sha256:21c4a5c7c3bc9b794c95241731ba98c38c7e62daca9ce823d3db960710f42db5","target":"graph","created_at":"2026-05-18T02:50:33Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"With a clear circular aperture, the vortex coronagraph perfectly cancels an on-axis point source and offers a 0.9 or 1.75 lambda/D inner working angle for topological charge 2 or 4, respectively. Current and near-future large telescopes are on-axis, however, and the diffraction effects of the central obscuration, and the secondary supports are strong enough to prevent the detection of companions 1e-3 - 1e-5 as bright as, or fainter than, their host star. Recent advances show that a ring apodizer can restore the performance of this coronagraph by compensating for the diffraction effects of a ci","authors_text":"Alexis Carlotti, Dimitri Mawet, Laurent Pueyo","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-04-10T15:20:35Z","title":"Apodized phase mask coronagraphs for arbitrary apertures. II. Comprehensive review of solutions for the vortex coronagraph"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1404.2845","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:323d7eeaf91668dc561fff1325e261265642e2544c065b47020b4a8728f03887","target":"record","created_at":"2026-05-18T02:50:33Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"9b29249e304ac529ea8e2c6e8957c37c159491371384123031ddeae79af08620","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-04-10T15:20:35Z","title_canon_sha256":"b17a8c4a462818e2246db534b1be743d06284c79280d3dca83d62b2e03a15a48"},"schema_version":"1.0","source":{"id":"1404.2845","kind":"arxiv","version":1}},"canonical_sha256":"bbd50416178d3052a1fc8b56efc09b9fd2c6b47071d8e4b02d019372dc539955","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bbd50416178d3052a1fc8b56efc09b9fd2c6b47071d8e4b02d019372dc539955","first_computed_at":"2026-05-18T02:50:33.547932Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:50:33.547932Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+Iff/sBdKcnJcPbhb82fXQf63xG2hwXdTo5defeE+K4yuXS9T6RWJZwD9Iwq3VOW5eWxGgCwIzB8K23BPWhIBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:50:33.548385Z","signed_message":"canonical_sha256_bytes"},"source_id":"1404.2845","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:323d7eeaf91668dc561fff1325e261265642e2544c065b47020b4a8728f03887","sha256:21c4a5c7c3bc9b794c95241731ba98c38c7e62daca9ce823d3db960710f42db5"],"state_sha256":"2c38718e92a6b3f0aad8fa71f30ee7700209c5f44707d65c25c87e74e6677dfb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wdrHSvdKlHQKdDR7rNmrb/UMgHpDrDsv3YzdjKaNJjvW3EAtowJnXq+OBec2GAAV8E6EoenmuVYPIDhelPb1DA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-28T12:19:21.149742Z","bundle_sha256":"3aaa4089b2368f7927471565776c4ef112dc5e55cf72c9427be05f98f195a55b"}}