{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:UYV6FF2EA2UK26K42N2W6HY4U5","short_pith_number":"pith:UYV6FF2E","canonical_record":{"source":{"id":"1209.3563","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.hist-ph","submitted_at":"2012-09-17T07:12:39Z","cross_cats_sorted":["astro-ph.IM","physics.ins-det"],"title_canon_sha256":"79f1be30e9c627c2eb48c990aa941e63495df97afdd0ecad3689a85800fefdbf","abstract_canon_sha256":"823556372db291860986839bd6e227ba9dee3b31f876283e46118d389176c090"},"schema_version":"1.0"},"canonical_sha256":"a62be2974406a8ad795cd3756f1f1ca76d608b29b72d510bee11a99c12c2c6b7","source":{"kind":"arxiv","id":"1209.3563","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.3563","created_at":"2026-05-18T01:54:27Z"},{"alias_kind":"arxiv_version","alias_value":"1209.3563v1","created_at":"2026-05-18T01:54:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.3563","created_at":"2026-05-18T01:54:27Z"},{"alias_kind":"pith_short_12","alias_value":"UYV6FF2EA2UK","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_16","alias_value":"UYV6FF2EA2UK26K4","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_8","alias_value":"UYV6FF2E","created_at":"2026-05-18T12:27:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:UYV6FF2EA2UK26K42N2W6HY4U5","target":"record","payload":{"canonical_record":{"source":{"id":"1209.3563","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.hist-ph","submitted_at":"2012-09-17T07:12:39Z","cross_cats_sorted":["astro-ph.IM","physics.ins-det"],"title_canon_sha256":"79f1be30e9c627c2eb48c990aa941e63495df97afdd0ecad3689a85800fefdbf","abstract_canon_sha256":"823556372db291860986839bd6e227ba9dee3b31f876283e46118d389176c090"},"schema_version":"1.0"},"canonical_sha256":"a62be2974406a8ad795cd3756f1f1ca76d608b29b72d510bee11a99c12c2c6b7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:54:27.490052Z","signature_b64":"foyke6tlOmTTwM26IWnOOF1AhDVO9QcDy3f+OO1OKf2Xkz9XSqAmjfaRMre/ZfY2QuNgt6b8BKigCqIEv71IDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a62be2974406a8ad795cd3756f1f1ca76d608b29b72d510bee11a99c12c2c6b7","last_reissued_at":"2026-05-18T01:54:27.489609Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:54:27.489609Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1209.3563","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":"2026-05-18T01:54:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9G7ULnFPw9mLPzenlBZPC1JJbkzOTgAOxS4Sn0sBzCCrTf4WjGleXKGf2pwgst/aIoEAWbIgwBCiv8m7qKdXAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T02:38:50.300583Z"},"content_sha256":"38f03bba15b3c49ee32aa8238a2ec29faf793b07dd345703bc030d96f3a8b357","schema_version":"1.0","event_id":"sha256:38f03bba15b3c49ee32aa8238a2ec29faf793b07dd345703bc030d96f3a8b357"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:UYV6FF2EA2UK26K42N2W6HY4U5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The History of Astrometry","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM","physics.ins-det"],"primary_cat":"physics.hist-ph","authors_text":"Michael Perryman","submitted_at":"2012-09-17T07:12:39Z","abstract_excerpt":"The history of astrometry, the branch of astronomy dealing with the positions of celestial objects, is a lengthy and complex chronicle, having its origins in the earliest records of astronomical observations more than two thousand years ago, and extending to the high accuracy observations being made from space today. Improved star positions progressively opened up and advanced fundamental fields of scientific enquiry, including our understanding of the scale of the solar system, the details of the Earth's motion through space, and the comprehension and acceptance of Newtonianism. They also pro"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.3563","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":"2026-05-18T01:54:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SEXyVYbdTXr16kEFU39Aqc2qmh8vMD3fqkD4MPgT5NLHIj8HC8c+QdNy9yosVjjBUU9N8RbhyaoRMkv51y2rDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T02:38:50.300937Z"},"content_sha256":"7a0a6ce41202205c85a6169dde758d42cf1bffe4b2b8ab6d49d79d1f48715f40","schema_version":"1.0","event_id":"sha256:7a0a6ce41202205c85a6169dde758d42cf1bffe4b2b8ab6d49d79d1f48715f40"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UYV6FF2EA2UK26K42N2W6HY4U5/bundle.json","state_url":"https://pith.science/pith/UYV6FF2EA2UK26K42N2W6HY4U5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UYV6FF2EA2UK26K42N2W6HY4U5/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":"2026-05-27T02:38:50Z","links":{"resolver":"https://pith.science/pith/UYV6FF2EA2UK26K42N2W6HY4U5","bundle":"https://pith.science/pith/UYV6FF2EA2UK26K42N2W6HY4U5/bundle.json","state":"https://pith.science/pith/UYV6FF2EA2UK26K42N2W6HY4U5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UYV6FF2EA2UK26K42N2W6HY4U5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:UYV6FF2EA2UK26K42N2W6HY4U5","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":"823556372db291860986839bd6e227ba9dee3b31f876283e46118d389176c090","cross_cats_sorted":["astro-ph.IM","physics.ins-det"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.hist-ph","submitted_at":"2012-09-17T07:12:39Z","title_canon_sha256":"79f1be30e9c627c2eb48c990aa941e63495df97afdd0ecad3689a85800fefdbf"},"schema_version":"1.0","source":{"id":"1209.3563","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.3563","created_at":"2026-05-18T01:54:27Z"},{"alias_kind":"arxiv_version","alias_value":"1209.3563v1","created_at":"2026-05-18T01:54:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.3563","created_at":"2026-05-18T01:54:27Z"},{"alias_kind":"pith_short_12","alias_value":"UYV6FF2EA2UK","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_16","alias_value":"UYV6FF2EA2UK26K4","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_8","alias_value":"UYV6FF2E","created_at":"2026-05-18T12:27:25Z"}],"graph_snapshots":[{"event_id":"sha256:7a0a6ce41202205c85a6169dde758d42cf1bffe4b2b8ab6d49d79d1f48715f40","target":"graph","created_at":"2026-05-18T01:54:27Z","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":"The history of astrometry, the branch of astronomy dealing with the positions of celestial objects, is a lengthy and complex chronicle, having its origins in the earliest records of astronomical observations more than two thousand years ago, and extending to the high accuracy observations being made from space today. Improved star positions progressively opened up and advanced fundamental fields of scientific enquiry, including our understanding of the scale of the solar system, the details of the Earth's motion through space, and the comprehension and acceptance of Newtonianism. They also pro","authors_text":"Michael Perryman","cross_cats":["astro-ph.IM","physics.ins-det"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.hist-ph","submitted_at":"2012-09-17T07:12:39Z","title":"The History of Astrometry"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.3563","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":"sha256:38f03bba15b3c49ee32aa8238a2ec29faf793b07dd345703bc030d96f3a8b357","target":"record","created_at":"2026-05-18T01:54:27Z","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":"823556372db291860986839bd6e227ba9dee3b31f876283e46118d389176c090","cross_cats_sorted":["astro-ph.IM","physics.ins-det"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.hist-ph","submitted_at":"2012-09-17T07:12:39Z","title_canon_sha256":"79f1be30e9c627c2eb48c990aa941e63495df97afdd0ecad3689a85800fefdbf"},"schema_version":"1.0","source":{"id":"1209.3563","kind":"arxiv","version":1}},"canonical_sha256":"a62be2974406a8ad795cd3756f1f1ca76d608b29b72d510bee11a99c12c2c6b7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a62be2974406a8ad795cd3756f1f1ca76d608b29b72d510bee11a99c12c2c6b7","first_computed_at":"2026-05-18T01:54:27.489609Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:54:27.489609Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"foyke6tlOmTTwM26IWnOOF1AhDVO9QcDy3f+OO1OKf2Xkz9XSqAmjfaRMre/ZfY2QuNgt6b8BKigCqIEv71IDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:54:27.490052Z","signed_message":"canonical_sha256_bytes"},"source_id":"1209.3563","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:38f03bba15b3c49ee32aa8238a2ec29faf793b07dd345703bc030d96f3a8b357","sha256:7a0a6ce41202205c85a6169dde758d42cf1bffe4b2b8ab6d49d79d1f48715f40"],"state_sha256":"c609fe0d5fa777c62e29d83e674d9f4e3787f5cc74db63baf6a5329003da6274"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HNnyUfiLxBOXhxfQkSBxuYKY5G1ncKxc5YmRfsiOR6NEyXkhgHhtFZhnBhxWAXomh9w2CQA9TYmXai4alXR2DA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T02:38:50.303659Z","bundle_sha256":"504a33e4023e5dc4f2d684761fafc4547245b31de6c98a3029bb11f3a6c07b0a"}}