{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:YODL4NTEIYH57J57RJJLMBKKPS","short_pith_number":"pith:YODL4NTE","canonical_record":{"source":{"id":"1704.05501","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-04-18T19:16:30Z","cross_cats_sorted":[],"title_canon_sha256":"807ea30db8c3b9e71341cddcf18f06dfed6481290e8ef46ff18a4be6fd5f5f60","abstract_canon_sha256":"e5bfde7a7386b02879f78ab7b22a62398b78f9a861e27f583d484bbef393b3e0"},"schema_version":"1.0"},"canonical_sha256":"c386be3664460fdfa7bf8a52b6054a7c95b3968e74bc39d6bb7b8129512fa6ce","source":{"kind":"arxiv","id":"1704.05501","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.05501","created_at":"2026-05-18T00:46:07Z"},{"alias_kind":"arxiv_version","alias_value":"1704.05501v1","created_at":"2026-05-18T00:46:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.05501","created_at":"2026-05-18T00:46:07Z"},{"alias_kind":"pith_short_12","alias_value":"YODL4NTEIYH5","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_16","alias_value":"YODL4NTEIYH57J57","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_8","alias_value":"YODL4NTE","created_at":"2026-05-18T12:31:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:YODL4NTEIYH57J57RJJLMBKKPS","target":"record","payload":{"canonical_record":{"source":{"id":"1704.05501","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-04-18T19:16:30Z","cross_cats_sorted":[],"title_canon_sha256":"807ea30db8c3b9e71341cddcf18f06dfed6481290e8ef46ff18a4be6fd5f5f60","abstract_canon_sha256":"e5bfde7a7386b02879f78ab7b22a62398b78f9a861e27f583d484bbef393b3e0"},"schema_version":"1.0"},"canonical_sha256":"c386be3664460fdfa7bf8a52b6054a7c95b3968e74bc39d6bb7b8129512fa6ce","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:46:07.288498Z","signature_b64":"aOaek+3Q6AbnyJpneRMpoYAJ2Ljz/nZmU5VonAB5FP8xnIRbwjXbNRtagj0BQATbMAwyj2haWe3520reUXEqBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c386be3664460fdfa7bf8a52b6054a7c95b3968e74bc39d6bb7b8129512fa6ce","last_reissued_at":"2026-05-18T00:46:07.287935Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:46:07.287935Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1704.05501","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":"2026-05-18T00:46:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IF88ygOl8fEVyPv52eyxcqyC8hYP2/fIOUlDpTwOsc8q7xNPdSl7JiV8XH7XJ1Qp5ZrOSHlV3eRRLepuufUpAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T18:57:44.808945Z"},"content_sha256":"5e11c0b0d76bf24b4c02a9ff6ede5a655d1122c613d6acc2391370e2031cde08","schema_version":"1.0","event_id":"sha256:5e11c0b0d76bf24b4c02a9ff6ede5a655d1122c613d6acc2391370e2031cde08"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:YODL4NTEIYH57J57RJJLMBKKPS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Fine cophasing of segmented aperture telescopes with ZELDA, a Zernike wavefront sensor in the diffraction-limited regime","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Arthur Vigan, Kjetil Dohlen, Mamadou N'Diaye, Marcel Carbillet, Patrice Martinez, Pierre Janin-Potiron","submitted_at":"2017-04-18T19:16:30Z","abstract_excerpt":"Segmented aperture telescopes require an alignment procedure with successive steps from coarse alignment to monitoring process in order to provide very high optical quality images for stringent science operations such as exoplanet imaging. The final step, referred to as fine phasing, calls for a high sensitivity wavefront sensing and control system in a diffraction-limited regime to achieve segment alignment with nanometric accuracy. In this context, Zernike wavefront sensors represent promising options for such a calibration. A concept called the Zernike unit for segment phasing (ZEUS) was pr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.05501","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":"2026-05-18T00:46:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8I1E/818oKN7NBRICCKdZgbnhy+TUYlbA4qWdecn7DqlEvJQ/RuD6iMD+OQShGdhN4o1D5gVQJ/N910OWiItAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T18:57:44.809403Z"},"content_sha256":"b4282e515a57a01a91c637076b83d6d57c4b8fae42357ef8476b296f0a4b59ac","schema_version":"1.0","event_id":"sha256:b4282e515a57a01a91c637076b83d6d57c4b8fae42357ef8476b296f0a4b59ac"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YODL4NTEIYH57J57RJJLMBKKPS/bundle.json","state_url":"https://pith.science/pith/YODL4NTEIYH57J57RJJLMBKKPS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YODL4NTEIYH57J57RJJLMBKKPS/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":"2026-06-02T18:57:44Z","links":{"resolver":"https://pith.science/pith/YODL4NTEIYH57J57RJJLMBKKPS","bundle":"https://pith.science/pith/YODL4NTEIYH57J57RJJLMBKKPS/bundle.json","state":"https://pith.science/pith/YODL4NTEIYH57J57RJJLMBKKPS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YODL4NTEIYH57J57RJJLMBKKPS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:YODL4NTEIYH57J57RJJLMBKKPS","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":"e5bfde7a7386b02879f78ab7b22a62398b78f9a861e27f583d484bbef393b3e0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-04-18T19:16:30Z","title_canon_sha256":"807ea30db8c3b9e71341cddcf18f06dfed6481290e8ef46ff18a4be6fd5f5f60"},"schema_version":"1.0","source":{"id":"1704.05501","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.05501","created_at":"2026-05-18T00:46:07Z"},{"alias_kind":"arxiv_version","alias_value":"1704.05501v1","created_at":"2026-05-18T00:46:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.05501","created_at":"2026-05-18T00:46:07Z"},{"alias_kind":"pith_short_12","alias_value":"YODL4NTEIYH5","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_16","alias_value":"YODL4NTEIYH57J57","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_8","alias_value":"YODL4NTE","created_at":"2026-05-18T12:31:56Z"}],"graph_snapshots":[{"event_id":"sha256:b4282e515a57a01a91c637076b83d6d57c4b8fae42357ef8476b296f0a4b59ac","target":"graph","created_at":"2026-05-18T00:46:07Z","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":"Segmented aperture telescopes require an alignment procedure with successive steps from coarse alignment to monitoring process in order to provide very high optical quality images for stringent science operations such as exoplanet imaging. The final step, referred to as fine phasing, calls for a high sensitivity wavefront sensing and control system in a diffraction-limited regime to achieve segment alignment with nanometric accuracy. In this context, Zernike wavefront sensors represent promising options for such a calibration. A concept called the Zernike unit for segment phasing (ZEUS) was pr","authors_text":"Arthur Vigan, Kjetil Dohlen, Mamadou N'Diaye, Marcel Carbillet, Patrice Martinez, Pierre Janin-Potiron","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-04-18T19:16:30Z","title":"Fine cophasing of segmented aperture telescopes with ZELDA, a Zernike wavefront sensor in the diffraction-limited regime"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.05501","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":"sha256:5e11c0b0d76bf24b4c02a9ff6ede5a655d1122c613d6acc2391370e2031cde08","target":"record","created_at":"2026-05-18T00:46:07Z","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":"e5bfde7a7386b02879f78ab7b22a62398b78f9a861e27f583d484bbef393b3e0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-04-18T19:16:30Z","title_canon_sha256":"807ea30db8c3b9e71341cddcf18f06dfed6481290e8ef46ff18a4be6fd5f5f60"},"schema_version":"1.0","source":{"id":"1704.05501","kind":"arxiv","version":1}},"canonical_sha256":"c386be3664460fdfa7bf8a52b6054a7c95b3968e74bc39d6bb7b8129512fa6ce","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c386be3664460fdfa7bf8a52b6054a7c95b3968e74bc39d6bb7b8129512fa6ce","first_computed_at":"2026-05-18T00:46:07.287935Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:46:07.287935Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aOaek+3Q6AbnyJpneRMpoYAJ2Ljz/nZmU5VonAB5FP8xnIRbwjXbNRtagj0BQATbMAwyj2haWe3520reUXEqBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:46:07.288498Z","signed_message":"canonical_sha256_bytes"},"source_id":"1704.05501","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5e11c0b0d76bf24b4c02a9ff6ede5a655d1122c613d6acc2391370e2031cde08","sha256:b4282e515a57a01a91c637076b83d6d57c4b8fae42357ef8476b296f0a4b59ac"],"state_sha256":"34597b8fd8e577b4628d9f69afde2660c46ba22c1ee4f8bbcabdd147d8a315b5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Nu3mhlR80pMNh1lj6lvsLwXMCa1YgG3WdQApWPxrg8te+Rjqc0oE7SWq+9UUAs4/mNUnz2ECrKmW05dOsiHJBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T18:57:44.811602Z","bundle_sha256":"ee97c1fc79f21c8fd3993f07f4f82f8bc594eb790a08f28bbd6588f8d92de58b"}}