{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:AE4X2KXX6PRFS7I6QA23DIADPH","short_pith_number":"pith:AE4X2KXX","canonical_record":{"source":{"id":"1901.07373","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-01-17T07:12:20Z","cross_cats_sorted":[],"title_canon_sha256":"1da4030a01086aea5d379928903d63a6c8bf2009fb6a9cf14250bdbfa98ea4f4","abstract_canon_sha256":"edfabec2771d41d23383e238e8fcdec7166b6e29c71b879357b711204a7925cf"},"schema_version":"1.0"},"canonical_sha256":"01397d2af7f3e2597d1e8035b1a00379e188592520bc6ce040a564fd8d4aa967","source":{"kind":"arxiv","id":"1901.07373","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.07373","created_at":"2026-05-17T23:55:47Z"},{"alias_kind":"arxiv_version","alias_value":"1901.07373v1","created_at":"2026-05-17T23:55:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.07373","created_at":"2026-05-17T23:55:47Z"},{"alias_kind":"pith_short_12","alias_value":"AE4X2KXX6PRF","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_16","alias_value":"AE4X2KXX6PRFS7I6","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_8","alias_value":"AE4X2KXX","created_at":"2026-05-18T12:33:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:AE4X2KXX6PRFS7I6QA23DIADPH","target":"record","payload":{"canonical_record":{"source":{"id":"1901.07373","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-01-17T07:12:20Z","cross_cats_sorted":[],"title_canon_sha256":"1da4030a01086aea5d379928903d63a6c8bf2009fb6a9cf14250bdbfa98ea4f4","abstract_canon_sha256":"edfabec2771d41d23383e238e8fcdec7166b6e29c71b879357b711204a7925cf"},"schema_version":"1.0"},"canonical_sha256":"01397d2af7f3e2597d1e8035b1a00379e188592520bc6ce040a564fd8d4aa967","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:55:47.165394Z","signature_b64":"cuKh6+lWuCmb6wVk/dCYk8g+BQxMG6rctwa0qNwmGJBxCZUMyq83TgIZ/vQwRuRo7iHbqcYK+KsTUzNJZTzsBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"01397d2af7f3e2597d1e8035b1a00379e188592520bc6ce040a564fd8d4aa967","last_reissued_at":"2026-05-17T23:55:47.164823Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:55:47.164823Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1901.07373","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":"2026-05-17T23:55:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"swhET3C1KWR72BzSeuospDn6cRmXxFHSrWfPsp2JbLTdXvlD/M+ZFlbFnBWCFvJU+qln72CwbxB3essCTKXEAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T21:53:04.119078Z"},"content_sha256":"d6c3021c00dca77240898ca80afd65f94e0f7ac78f833174ea66a8c2e3436f12","schema_version":"1.0","event_id":"sha256:d6c3021c00dca77240898ca80afd65f94e0f7ac78f833174ea66a8c2e3436f12"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:AE4X2KXX6PRFS7I6QA23DIADPH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Active optics in astronomy - Freeform mirror for the MESSIER telescope proposal","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Eduard Muslimov (LAM), Gerard Lemaitre (LAM), Pascal Vola (LAM)","submitted_at":"2019-01-17T07:12:20Z","abstract_excerpt":"Active optics techniques in astronomy provide high imaging quality. This paper is dedicated to highly deformable active optics that can generate non-axisymmetric aspheric surfaces-or freeform surfaces-by use of a minimum number of actuators. The aspheric mirror is obtained from a single uniform load t h a t acts over the surface of a closed-form substrate whilst under axia l reaction to its elliptical perimeter ring during spherical polishing. MESSIER space proposal is a wide-field low-central-obstruction folded-two-mirror-anastigmat or here called briefly three-mirror-anastigmat (TMA) telesco"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.07373","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":"2026-05-17T23:55:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PcLQDHC+d4RNThfyvpzxnDqQQD9k3Q5GHr7Vag5v90yQtU5kNkxE7k6PjJy7j0hpBiTxvHEg/X/B58qoSE1oAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T21:53:04.119472Z"},"content_sha256":"f234d4e6495e5d429801ddacd1a863f74c01eb9324571c731bdcb4377a61826b","schema_version":"1.0","event_id":"sha256:f234d4e6495e5d429801ddacd1a863f74c01eb9324571c731bdcb4377a61826b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AE4X2KXX6PRFS7I6QA23DIADPH/bundle.json","state_url":"https://pith.science/pith/AE4X2KXX6PRFS7I6QA23DIADPH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AE4X2KXX6PRFS7I6QA23DIADPH/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":"2026-05-27T21:53:04Z","links":{"resolver":"https://pith.science/pith/AE4X2KXX6PRFS7I6QA23DIADPH","bundle":"https://pith.science/pith/AE4X2KXX6PRFS7I6QA23DIADPH/bundle.json","state":"https://pith.science/pith/AE4X2KXX6PRFS7I6QA23DIADPH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AE4X2KXX6PRFS7I6QA23DIADPH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:AE4X2KXX6PRFS7I6QA23DIADPH","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":"edfabec2771d41d23383e238e8fcdec7166b6e29c71b879357b711204a7925cf","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-01-17T07:12:20Z","title_canon_sha256":"1da4030a01086aea5d379928903d63a6c8bf2009fb6a9cf14250bdbfa98ea4f4"},"schema_version":"1.0","source":{"id":"1901.07373","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.07373","created_at":"2026-05-17T23:55:47Z"},{"alias_kind":"arxiv_version","alias_value":"1901.07373v1","created_at":"2026-05-17T23:55:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.07373","created_at":"2026-05-17T23:55:47Z"},{"alias_kind":"pith_short_12","alias_value":"AE4X2KXX6PRF","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_16","alias_value":"AE4X2KXX6PRFS7I6","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_8","alias_value":"AE4X2KXX","created_at":"2026-05-18T12:33:12Z"}],"graph_snapshots":[{"event_id":"sha256:f234d4e6495e5d429801ddacd1a863f74c01eb9324571c731bdcb4377a61826b","target":"graph","created_at":"2026-05-17T23:55:47Z","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":"Active optics techniques in astronomy provide high imaging quality. This paper is dedicated to highly deformable active optics that can generate non-axisymmetric aspheric surfaces-or freeform surfaces-by use of a minimum number of actuators. The aspheric mirror is obtained from a single uniform load t h a t acts over the surface of a closed-form substrate whilst under axia l reaction to its elliptical perimeter ring during spherical polishing. MESSIER space proposal is a wide-field low-central-obstruction folded-two-mirror-anastigmat or here called briefly three-mirror-anastigmat (TMA) telesco","authors_text":"Eduard Muslimov (LAM), Gerard Lemaitre (LAM), Pascal Vola (LAM)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-01-17T07:12:20Z","title":"Active optics in astronomy - Freeform mirror for the MESSIER telescope proposal"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.07373","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:d6c3021c00dca77240898ca80afd65f94e0f7ac78f833174ea66a8c2e3436f12","target":"record","created_at":"2026-05-17T23:55:47Z","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":"edfabec2771d41d23383e238e8fcdec7166b6e29c71b879357b711204a7925cf","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-01-17T07:12:20Z","title_canon_sha256":"1da4030a01086aea5d379928903d63a6c8bf2009fb6a9cf14250bdbfa98ea4f4"},"schema_version":"1.0","source":{"id":"1901.07373","kind":"arxiv","version":1}},"canonical_sha256":"01397d2af7f3e2597d1e8035b1a00379e188592520bc6ce040a564fd8d4aa967","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"01397d2af7f3e2597d1e8035b1a00379e188592520bc6ce040a564fd8d4aa967","first_computed_at":"2026-05-17T23:55:47.164823Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:55:47.164823Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"cuKh6+lWuCmb6wVk/dCYk8g+BQxMG6rctwa0qNwmGJBxCZUMyq83TgIZ/vQwRuRo7iHbqcYK+KsTUzNJZTzsBg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:55:47.165394Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.07373","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d6c3021c00dca77240898ca80afd65f94e0f7ac78f833174ea66a8c2e3436f12","sha256:f234d4e6495e5d429801ddacd1a863f74c01eb9324571c731bdcb4377a61826b"],"state_sha256":"a7dd4402d8114e462f2bb82383b370aa9b60e4fe3ced7bf43917f0b3d8831bef"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7WBVr6m0gwkdRRLmqM6hqoYq0KDEwtMHiDnJHU3DilR1uSHRjF5+a4WouVvySri1BKISUg+uxgMLhQ1snyTWDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T21:53:04.122768Z","bundle_sha256":"4b082713d2fa53c0f597578daa79fc733f1d90fba52648c88eaac590b8b52299"}}