{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:V5BXON6IW5XOSJVTRIOV5MQX2G","short_pith_number":"pith:V5BXON6I","canonical_record":{"source":{"id":"1607.01554","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-07-06T10:55:31Z","cross_cats_sorted":[],"title_canon_sha256":"40f177909ed11a2c2c133aeeba87bc16e155dd25a53f52c9a1f162c3b3857c3d","abstract_canon_sha256":"205319593c984840ca4f091d24a40cb9d869588471b018587c9387eec4a9fab9"},"schema_version":"1.0"},"canonical_sha256":"af437737c8b76ee926b38a1d5eb217d1ac3118b6b0f762827e48281f4cd22339","source":{"kind":"arxiv","id":"1607.01554","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.01554","created_at":"2026-05-18T00:55:46Z"},{"alias_kind":"arxiv_version","alias_value":"1607.01554v1","created_at":"2026-05-18T00:55:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.01554","created_at":"2026-05-18T00:55:46Z"},{"alias_kind":"pith_short_12","alias_value":"V5BXON6IW5XO","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_16","alias_value":"V5BXON6IW5XOSJVT","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_8","alias_value":"V5BXON6I","created_at":"2026-05-18T12:30:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:V5BXON6IW5XOSJVTRIOV5MQX2G","target":"record","payload":{"canonical_record":{"source":{"id":"1607.01554","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-07-06T10:55:31Z","cross_cats_sorted":[],"title_canon_sha256":"40f177909ed11a2c2c133aeeba87bc16e155dd25a53f52c9a1f162c3b3857c3d","abstract_canon_sha256":"205319593c984840ca4f091d24a40cb9d869588471b018587c9387eec4a9fab9"},"schema_version":"1.0"},"canonical_sha256":"af437737c8b76ee926b38a1d5eb217d1ac3118b6b0f762827e48281f4cd22339","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:55:46.083933Z","signature_b64":"LzBLx2yyDvYND60VNG3Gnw8X6CFMQHs1bTZVzjoIk+kkShgxnjTwgiP9wmbPByx7hquf+thrc8bEjxh7H4V9AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"af437737c8b76ee926b38a1d5eb217d1ac3118b6b0f762827e48281f4cd22339","last_reissued_at":"2026-05-18T00:55:46.083205Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:55:46.083205Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1607.01554","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":"2026-05-18T00:55:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"71FIcLVG0VzTcl9lk6zgj2jSYzyaLF8uKoL3BkRX9rMzWH37z7wXVAdpnDZYrbOuvCKVrVsJe3r1aqQPzPBTBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T13:25:39.240596Z"},"content_sha256":"8758e1066fd72fd19f2b4d078d2c61c5aaaceba9e06d69e23a44d7b179f86ad0","schema_version":"1.0","event_id":"sha256:8758e1066fd72fd19f2b4d078d2c61c5aaaceba9e06d69e23a44d7b179f86ad0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:V5BXON6IW5XOSJVTRIOV5MQX2G","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Analysis of nulling phase functions suitable to image plane coronagraphy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Alexis Carlotti, Christophe Verinaud, Francois Henault","submitted_at":"2016-07-06T10:55:31Z","abstract_excerpt":"Coronagraphy is a very efficient technique for identifying and characterizing extra-solar planets orbiting in the habitable zone of their parent star, especially when used in a space environment. An important family of coronagraphs is based on phase plates located at an intermediate image plane of the optical system, that spread the starlight outside the \"Lyot\" exit pupil plane of the instrument. In this communication we present a set of candidate phase functions generating a central null at the Lyot plane, and study how it propagates to the image plane of the coronagraph. These functions incl"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.01554","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":"2026-05-18T00:55:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MfuDJSv18Prz+St//NIkcNkvsZU3xg16xmjmGEGKbyb5OMBIwfoQLL4tGToZoa5PLgnU3ijzJmWnBwZ91Y3wCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T13:25:39.240949Z"},"content_sha256":"6ce2a4440a08ab870fd963c2bec94365bd03458c595ee2b643d118faaccebe80","schema_version":"1.0","event_id":"sha256:6ce2a4440a08ab870fd963c2bec94365bd03458c595ee2b643d118faaccebe80"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/V5BXON6IW5XOSJVTRIOV5MQX2G/bundle.json","state_url":"https://pith.science/pith/V5BXON6IW5XOSJVTRIOV5MQX2G/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/V5BXON6IW5XOSJVTRIOV5MQX2G/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":"2026-06-11T13:25:39Z","links":{"resolver":"https://pith.science/pith/V5BXON6IW5XOSJVTRIOV5MQX2G","bundle":"https://pith.science/pith/V5BXON6IW5XOSJVTRIOV5MQX2G/bundle.json","state":"https://pith.science/pith/V5BXON6IW5XOSJVTRIOV5MQX2G/state.json","well_known_bundle":"https://pith.science/.well-known/pith/V5BXON6IW5XOSJVTRIOV5MQX2G/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:V5BXON6IW5XOSJVTRIOV5MQX2G","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":"205319593c984840ca4f091d24a40cb9d869588471b018587c9387eec4a9fab9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-07-06T10:55:31Z","title_canon_sha256":"40f177909ed11a2c2c133aeeba87bc16e155dd25a53f52c9a1f162c3b3857c3d"},"schema_version":"1.0","source":{"id":"1607.01554","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.01554","created_at":"2026-05-18T00:55:46Z"},{"alias_kind":"arxiv_version","alias_value":"1607.01554v1","created_at":"2026-05-18T00:55:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.01554","created_at":"2026-05-18T00:55:46Z"},{"alias_kind":"pith_short_12","alias_value":"V5BXON6IW5XO","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_16","alias_value":"V5BXON6IW5XOSJVT","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_8","alias_value":"V5BXON6I","created_at":"2026-05-18T12:30:46Z"}],"graph_snapshots":[{"event_id":"sha256:6ce2a4440a08ab870fd963c2bec94365bd03458c595ee2b643d118faaccebe80","target":"graph","created_at":"2026-05-18T00:55:46Z","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":"Coronagraphy is a very efficient technique for identifying and characterizing extra-solar planets orbiting in the habitable zone of their parent star, especially when used in a space environment. An important family of coronagraphs is based on phase plates located at an intermediate image plane of the optical system, that spread the starlight outside the \"Lyot\" exit pupil plane of the instrument. In this communication we present a set of candidate phase functions generating a central null at the Lyot plane, and study how it propagates to the image plane of the coronagraph. These functions incl","authors_text":"Alexis Carlotti, Christophe Verinaud, Francois Henault","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-07-06T10:55:31Z","title":"Analysis of nulling phase functions suitable to image plane coronagraphy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.01554","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":"sha256:8758e1066fd72fd19f2b4d078d2c61c5aaaceba9e06d69e23a44d7b179f86ad0","target":"record","created_at":"2026-05-18T00:55:46Z","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":"205319593c984840ca4f091d24a40cb9d869588471b018587c9387eec4a9fab9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-07-06T10:55:31Z","title_canon_sha256":"40f177909ed11a2c2c133aeeba87bc16e155dd25a53f52c9a1f162c3b3857c3d"},"schema_version":"1.0","source":{"id":"1607.01554","kind":"arxiv","version":1}},"canonical_sha256":"af437737c8b76ee926b38a1d5eb217d1ac3118b6b0f762827e48281f4cd22339","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"af437737c8b76ee926b38a1d5eb217d1ac3118b6b0f762827e48281f4cd22339","first_computed_at":"2026-05-18T00:55:46.083205Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:55:46.083205Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LzBLx2yyDvYND60VNG3Gnw8X6CFMQHs1bTZVzjoIk+kkShgxnjTwgiP9wmbPByx7hquf+thrc8bEjxh7H4V9AA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:55:46.083933Z","signed_message":"canonical_sha256_bytes"},"source_id":"1607.01554","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8758e1066fd72fd19f2b4d078d2c61c5aaaceba9e06d69e23a44d7b179f86ad0","sha256:6ce2a4440a08ab870fd963c2bec94365bd03458c595ee2b643d118faaccebe80"],"state_sha256":"d1fe0a8969181bda34ed0dc19ce83b74ae10abcb1718c64d60304dc2f4afdd59"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WMlbm1IxL8/QSHtUNnoefRQ/kNM/x7Y0iLeJz5aiuM8JUr6DzWm95Sp8QxcOQPDYFluFQ7PjfBNdzq7ULRsHCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T13:25:39.243027Z","bundle_sha256":"0c7e46ec7af63b8fbe33b60049046111fee236e840d80c7934727aa79b3547d4"}}