{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:LRPEMXVMAIMZC6NAFR3WX53XEE","short_pith_number":"pith:LRPEMXVM","canonical_record":{"source":{"id":"1707.03256","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-07-11T13:13:29Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"f7f2d93bc25a224b8980e43c0526bed78ad7338fbc996bc5a6526a1fab083ab3","abstract_canon_sha256":"2889e0aca6dbe91b8099e32fb8c7c184fcd9240b33bdcbe6f66a4adea9f00998"},"schema_version":"1.0"},"canonical_sha256":"5c5e465eac02199179a02c776bf77721251d9d4360852694789e428ee0700754","source":{"kind":"arxiv","id":"1707.03256","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.03256","created_at":"2026-05-18T00:40:29Z"},{"alias_kind":"arxiv_version","alias_value":"1707.03256v1","created_at":"2026-05-18T00:40:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.03256","created_at":"2026-05-18T00:40:29Z"},{"alias_kind":"pith_short_12","alias_value":"LRPEMXVMAIMZ","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_16","alias_value":"LRPEMXVMAIMZC6NA","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_8","alias_value":"LRPEMXVM","created_at":"2026-05-18T12:31:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:LRPEMXVMAIMZC6NAFR3WX53XEE","target":"record","payload":{"canonical_record":{"source":{"id":"1707.03256","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-07-11T13:13:29Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"f7f2d93bc25a224b8980e43c0526bed78ad7338fbc996bc5a6526a1fab083ab3","abstract_canon_sha256":"2889e0aca6dbe91b8099e32fb8c7c184fcd9240b33bdcbe6f66a4adea9f00998"},"schema_version":"1.0"},"canonical_sha256":"5c5e465eac02199179a02c776bf77721251d9d4360852694789e428ee0700754","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:40:29.468162Z","signature_b64":"fHKlQ3vPoCcWFflfNBsHYgUFRYrzQYBeA/SHqM3ahmkzVwfoiGbQGqxJWMuUQpSBh9L64qDN3cEV/i6NWIlVDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5c5e465eac02199179a02c776bf77721251d9d4360852694789e428ee0700754","last_reissued_at":"2026-05-18T00:40:29.467649Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:40:29.467649Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1707.03256","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":"2026-05-18T00:40:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gsxrpP4Cf7fKFDP9xOklr+xTSgnQcq+jK32z/ExxaN0LTyVNN3pj/KoCzYRn9/BoPQq8qNqZWFTsDomJQx1lDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T15:00:20.454722Z"},"content_sha256":"2a5e3d9e738c6bc9e52e68ccfb841983d2650a20079448d8b051077468928875","schema_version":"1.0","event_id":"sha256:2a5e3d9e738c6bc9e52e68ccfb841983d2650a20079448d8b051077468928875"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:LRPEMXVMAIMZC6NAFR3WX53XEE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Implementing focal-plane phase masks optimized for real telescope apertures with SLM-based digital adaptive coronagraphy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"astro-ph.IM","authors_text":"Garreth Ruane, Jonas K\\\"uhn, Patapis Polychronis, Xin Lu","submitted_at":"2017-07-11T13:13:29Z","abstract_excerpt":"Direct imaging of exoplanets or circumstellar disk material requires extreme contrast at the 10-6 to 10-12 levels at < 100 mas angular separation from the star. Focal-plane mask (FPM) coronagraphic imaging has played a key role in this field, taking advantage of progress in Adaptive Optics on ground-based 8+m class telescopes. However, large telescope entrance pupils usually consist of complex, sometimes segmented, non-ideal apertures, which include a central obstruction for the secondary mirror and its support structure. In practice, this negatively impacts wavefront quality and coronagraphic"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.03256","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":"2026-05-18T00:40:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jjKTTUSWEGL94GSobE+qphy4Yq/PjLCgq8Y8x9QnjNyve98i33YxtmHDEDXffnEjd97D5tfHdZ5J+vmH9zzwAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T15:00:20.455085Z"},"content_sha256":"b823d511e80616779898653dbfc4dbb7ab1fbc54639d266efd59f847dcc69f17","schema_version":"1.0","event_id":"sha256:b823d511e80616779898653dbfc4dbb7ab1fbc54639d266efd59f847dcc69f17"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LRPEMXVMAIMZC6NAFR3WX53XEE/bundle.json","state_url":"https://pith.science/pith/LRPEMXVMAIMZC6NAFR3WX53XEE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LRPEMXVMAIMZC6NAFR3WX53XEE/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":"2026-06-05T15:00:20Z","links":{"resolver":"https://pith.science/pith/LRPEMXVMAIMZC6NAFR3WX53XEE","bundle":"https://pith.science/pith/LRPEMXVMAIMZC6NAFR3WX53XEE/bundle.json","state":"https://pith.science/pith/LRPEMXVMAIMZC6NAFR3WX53XEE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LRPEMXVMAIMZC6NAFR3WX53XEE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:LRPEMXVMAIMZC6NAFR3WX53XEE","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":"2889e0aca6dbe91b8099e32fb8c7c184fcd9240b33bdcbe6f66a4adea9f00998","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-07-11T13:13:29Z","title_canon_sha256":"f7f2d93bc25a224b8980e43c0526bed78ad7338fbc996bc5a6526a1fab083ab3"},"schema_version":"1.0","source":{"id":"1707.03256","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.03256","created_at":"2026-05-18T00:40:29Z"},{"alias_kind":"arxiv_version","alias_value":"1707.03256v1","created_at":"2026-05-18T00:40:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.03256","created_at":"2026-05-18T00:40:29Z"},{"alias_kind":"pith_short_12","alias_value":"LRPEMXVMAIMZ","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_16","alias_value":"LRPEMXVMAIMZC6NA","created_at":"2026-05-18T12:31:28Z"},{"alias_kind":"pith_short_8","alias_value":"LRPEMXVM","created_at":"2026-05-18T12:31:28Z"}],"graph_snapshots":[{"event_id":"sha256:b823d511e80616779898653dbfc4dbb7ab1fbc54639d266efd59f847dcc69f17","target":"graph","created_at":"2026-05-18T00:40:29Z","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":"Direct imaging of exoplanets or circumstellar disk material requires extreme contrast at the 10-6 to 10-12 levels at < 100 mas angular separation from the star. Focal-plane mask (FPM) coronagraphic imaging has played a key role in this field, taking advantage of progress in Adaptive Optics on ground-based 8+m class telescopes. However, large telescope entrance pupils usually consist of complex, sometimes segmented, non-ideal apertures, which include a central obstruction for the secondary mirror and its support structure. In practice, this negatively impacts wavefront quality and coronagraphic","authors_text":"Garreth Ruane, Jonas K\\\"uhn, Patapis Polychronis, Xin Lu","cross_cats":["physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-07-11T13:13:29Z","title":"Implementing focal-plane phase masks optimized for real telescope apertures with SLM-based digital adaptive coronagraphy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.03256","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":"sha256:2a5e3d9e738c6bc9e52e68ccfb841983d2650a20079448d8b051077468928875","target":"record","created_at":"2026-05-18T00:40:29Z","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":"2889e0aca6dbe91b8099e32fb8c7c184fcd9240b33bdcbe6f66a4adea9f00998","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-07-11T13:13:29Z","title_canon_sha256":"f7f2d93bc25a224b8980e43c0526bed78ad7338fbc996bc5a6526a1fab083ab3"},"schema_version":"1.0","source":{"id":"1707.03256","kind":"arxiv","version":1}},"canonical_sha256":"5c5e465eac02199179a02c776bf77721251d9d4360852694789e428ee0700754","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5c5e465eac02199179a02c776bf77721251d9d4360852694789e428ee0700754","first_computed_at":"2026-05-18T00:40:29.467649Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:40:29.467649Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fHKlQ3vPoCcWFflfNBsHYgUFRYrzQYBeA/SHqM3ahmkzVwfoiGbQGqxJWMuUQpSBh9L64qDN3cEV/i6NWIlVDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:40:29.468162Z","signed_message":"canonical_sha256_bytes"},"source_id":"1707.03256","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2a5e3d9e738c6bc9e52e68ccfb841983d2650a20079448d8b051077468928875","sha256:b823d511e80616779898653dbfc4dbb7ab1fbc54639d266efd59f847dcc69f17"],"state_sha256":"ffbb8d4e27868a343cfb4e570109256801d16a367a9118fd60f7111e86f7d136"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GEJnzb1HZNpGkJEfHOKiO64I6tB1UT1mjqHhCcGnJv5p+3TZofdzPLKYMWMagoE7ZJd95mr1uzVtMGvVSgt8Dw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T15:00:20.457027Z","bundle_sha256":"48dafbc0cd55e5d4b10d4acff37fb94aaccede3c241015b682bef8767baab13b"}}