{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:6ZLDPB5BHFOASVY2B3ISX3L52F","short_pith_number":"pith:6ZLDPB5B","canonical_record":{"source":{"id":"1908.09786","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-08-26T16:37:44Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"23d2bd49489196f24554c395724ebb262d09055fc1793220c97d2ad6fc808a28","abstract_canon_sha256":"3844c58a13419b08487f05e84d2c967273fd39a6b523e70e563536d65a2a55f3"},"schema_version":"1.0"},"canonical_sha256":"f6563787a1395c09571a0ed12bed7dd1426814b0bbfd40af2a8d335e6577e133","source":{"kind":"arxiv","id":"1908.09786","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.09786","created_at":"2026-07-05T00:03:17Z"},{"alias_kind":"arxiv_version","alias_value":"1908.09786v2","created_at":"2026-07-05T00:03:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.09786","created_at":"2026-07-05T00:03:17Z"},{"alias_kind":"pith_short_12","alias_value":"6ZLDPB5BHFOA","created_at":"2026-07-05T00:03:17Z"},{"alias_kind":"pith_short_16","alias_value":"6ZLDPB5BHFOASVY2","created_at":"2026-07-05T00:03:17Z"},{"alias_kind":"pith_short_8","alias_value":"6ZLDPB5B","created_at":"2026-07-05T00:03:17Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:6ZLDPB5BHFOASVY2B3ISX3L52F","target":"record","payload":{"canonical_record":{"source":{"id":"1908.09786","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-08-26T16:37:44Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"23d2bd49489196f24554c395724ebb262d09055fc1793220c97d2ad6fc808a28","abstract_canon_sha256":"3844c58a13419b08487f05e84d2c967273fd39a6b523e70e563536d65a2a55f3"},"schema_version":"1.0"},"canonical_sha256":"f6563787a1395c09571a0ed12bed7dd1426814b0bbfd40af2a8d335e6577e133","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:03:17.395684Z","signature_b64":"uLo/PYh/024hwYJqojJAgCSYTV1JFH5pRmxyjpjmuS1X0p+knmKg2ausC6OtIv0LfiOgL1CeiS4Hs3vadCNuAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f6563787a1395c09571a0ed12bed7dd1426814b0bbfd40af2a8d335e6577e133","last_reissued_at":"2026-07-05T00:03:17.395121Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:03:17.395121Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1908.09786","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T00:03:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OBaiZF9jmgMM34daA66pYCcsDz4a4NSVwLbVwhfi4NbC5c8id2RVkPRiYodUrOi+aek1qNhIw1b046A/tWltAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T12:29:59.396528Z"},"content_sha256":"2c655d868c1c5dcbdbdb264d284e0e530aa6c186444cf7b059e3a633be0dab21","schema_version":"1.0","event_id":"sha256:2c655d868c1c5dcbdbdb264d284e0e530aa6c186444cf7b059e3a633be0dab21"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:6ZLDPB5BHFOASVY2B3ISX3L52F","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Scalar vortex coronagraph mask design and predicted performance","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"astro-ph.IM","authors_text":"A J Eldorado Riggs, Dimitri Mawet, Eugene Serabyn, Garreth Ruane","submitted_at":"2019-08-26T16:37:44Z","abstract_excerpt":"Vortex coronagraphs are an attractive solution for imaging exoplanets with future space telescopes due to their relatively high throughput, large spectral bandwidth, and low sensitivity to low-order aberrations compared to other coronagraphs with similar inner working angles. Most of the vortex coronagraph mask development for space applications has focused on generating a polychromatic, vectorial, optical vortex using multiple layers of liquid crystal polymers. While this approach has been the most successful thus far, current fabrication processes achieve retardance errors of 0.1-1.0$^\\circ$"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.09786","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1908.09786/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T00:03:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5Nzi2LW6RnmtjzwhiXXDEgb+oei4MOjb9cGQ5//YfEUW4jcbc881/nn7XYPCVxpoInrWFPVKSONQXOvw3qL1Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T12:29:59.397045Z"},"content_sha256":"18a0783ef6187bb95935a069ac84379a70f3e2fa9c5b89209eb90ed7ffdb1a71","schema_version":"1.0","event_id":"sha256:18a0783ef6187bb95935a069ac84379a70f3e2fa9c5b89209eb90ed7ffdb1a71"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6ZLDPB5BHFOASVY2B3ISX3L52F/bundle.json","state_url":"https://pith.science/pith/6ZLDPB5BHFOASVY2B3ISX3L52F/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6ZLDPB5BHFOASVY2B3ISX3L52F/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":"2026-08-17T12:29:59Z","links":{"resolver":"https://pith.science/pith/6ZLDPB5BHFOASVY2B3ISX3L52F","bundle":"https://pith.science/pith/6ZLDPB5BHFOASVY2B3ISX3L52F/bundle.json","state":"https://pith.science/pith/6ZLDPB5BHFOASVY2B3ISX3L52F/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6ZLDPB5BHFOASVY2B3ISX3L52F/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:6ZLDPB5BHFOASVY2B3ISX3L52F","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":"3844c58a13419b08487f05e84d2c967273fd39a6b523e70e563536d65a2a55f3","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-08-26T16:37:44Z","title_canon_sha256":"23d2bd49489196f24554c395724ebb262d09055fc1793220c97d2ad6fc808a28"},"schema_version":"1.0","source":{"id":"1908.09786","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.09786","created_at":"2026-07-05T00:03:17Z"},{"alias_kind":"arxiv_version","alias_value":"1908.09786v2","created_at":"2026-07-05T00:03:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.09786","created_at":"2026-07-05T00:03:17Z"},{"alias_kind":"pith_short_12","alias_value":"6ZLDPB5BHFOA","created_at":"2026-07-05T00:03:17Z"},{"alias_kind":"pith_short_16","alias_value":"6ZLDPB5BHFOASVY2","created_at":"2026-07-05T00:03:17Z"},{"alias_kind":"pith_short_8","alias_value":"6ZLDPB5B","created_at":"2026-07-05T00:03:17Z"}],"graph_snapshots":[{"event_id":"sha256:18a0783ef6187bb95935a069ac84379a70f3e2fa9c5b89209eb90ed7ffdb1a71","target":"graph","created_at":"2026-07-05T00:03:17Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1908.09786/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Vortex coronagraphs are an attractive solution for imaging exoplanets with future space telescopes due to their relatively high throughput, large spectral bandwidth, and low sensitivity to low-order aberrations compared to other coronagraphs with similar inner working angles. Most of the vortex coronagraph mask development for space applications has focused on generating a polychromatic, vectorial, optical vortex using multiple layers of liquid crystal polymers. While this approach has been the most successful thus far, current fabrication processes achieve retardance errors of 0.1-1.0$^\\circ$","authors_text":"A J Eldorado Riggs, Dimitri Mawet, Eugene Serabyn, Garreth Ruane","cross_cats":["physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-08-26T16:37:44Z","title":"Scalar vortex coronagraph mask design and predicted performance"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.09786","kind":"arxiv","version":2},"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":"sha256:2c655d868c1c5dcbdbdb264d284e0e530aa6c186444cf7b059e3a633be0dab21","target":"record","created_at":"2026-07-05T00:03:17Z","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":"3844c58a13419b08487f05e84d2c967273fd39a6b523e70e563536d65a2a55f3","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-08-26T16:37:44Z","title_canon_sha256":"23d2bd49489196f24554c395724ebb262d09055fc1793220c97d2ad6fc808a28"},"schema_version":"1.0","source":{"id":"1908.09786","kind":"arxiv","version":2}},"canonical_sha256":"f6563787a1395c09571a0ed12bed7dd1426814b0bbfd40af2a8d335e6577e133","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f6563787a1395c09571a0ed12bed7dd1426814b0bbfd40af2a8d335e6577e133","first_computed_at":"2026-07-05T00:03:17.395121Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:03:17.395121Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uLo/PYh/024hwYJqojJAgCSYTV1JFH5pRmxyjpjmuS1X0p+knmKg2ausC6OtIv0LfiOgL1CeiS4Hs3vadCNuAw==","signature_status":"signed_v1","signed_at":"2026-07-05T00:03:17.395684Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.09786","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2c655d868c1c5dcbdbdb264d284e0e530aa6c186444cf7b059e3a633be0dab21","sha256:18a0783ef6187bb95935a069ac84379a70f3e2fa9c5b89209eb90ed7ffdb1a71"],"state_sha256":"540b369020fb091ecfcb4ef7419ac537a38925f14c413575575644bcfbf6174b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"L5yeZ9NVjqQd4wh8ZXAtvginRiCTCsnNO7enhreblqa+4CgOb6WgltNURQOCkR6B/Sa0pyiLhfID93bFehEJBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-17T12:29:59.402360Z","bundle_sha256":"6d48eb8536a2918efbd2588712585d6e8d3dc017f28d9d0b7b551d9f0fa92167"}}