{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:63WKBE6ASD3UQVVNL6VMAIX6F6","short_pith_number":"pith:63WKBE6A","canonical_record":{"source":{"id":"1903.11145","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-03-26T20:25:27Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"918ef026fa062b2dec51e0b8ccc40476e58f9f27bb5f874901b264cbaf5bf335","abstract_canon_sha256":"ca96da4686a5a5c4812c3a20e7a77ae5bfe8a1f1e98827ceacec342d9caafcf4"},"schema_version":"1.0"},"canonical_sha256":"f6eca093c090f74856ad5faac022fe2f8a879c0533ba11a9d1729552383cb414","source":{"kind":"arxiv","id":"1903.11145","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.11145","created_at":"2026-05-17T23:50:04Z"},{"alias_kind":"arxiv_version","alias_value":"1903.11145v1","created_at":"2026-05-17T23:50:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.11145","created_at":"2026-05-17T23:50:04Z"},{"alias_kind":"pith_short_12","alias_value":"63WKBE6ASD3U","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_16","alias_value":"63WKBE6ASD3UQVVN","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_8","alias_value":"63WKBE6A","created_at":"2026-05-18T12:33:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:63WKBE6ASD3UQVVNL6VMAIX6F6","target":"record","payload":{"canonical_record":{"source":{"id":"1903.11145","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-03-26T20:25:27Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"918ef026fa062b2dec51e0b8ccc40476e58f9f27bb5f874901b264cbaf5bf335","abstract_canon_sha256":"ca96da4686a5a5c4812c3a20e7a77ae5bfe8a1f1e98827ceacec342d9caafcf4"},"schema_version":"1.0"},"canonical_sha256":"f6eca093c090f74856ad5faac022fe2f8a879c0533ba11a9d1729552383cb414","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:50:04.026244Z","signature_b64":"D4FwpQNOW2D8PHldXhOxfFOzvQTPeEciNj2nw+yOJG12ytV3ddnocRvCMx5fUZHG9BDA8mT3rt1IKfkbuB13DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f6eca093c090f74856ad5faac022fe2f8a879c0533ba11a9d1729552383cb414","last_reissued_at":"2026-05-17T23:50:04.025641Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:50:04.025641Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1903.11145","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":"2026-05-17T23:50:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WzJRHEge0mtvO2aMhbRFkyPI0+ncs1KFAobt1Xot8pB8v+lWDF6PnjMmgfs87jRk6oDK2/+VcxTqhk7tS9giAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T23:53:26.281701Z"},"content_sha256":"3bfb17f24f49e8bdd87329364653db082a6e866ef151b5e945dccd0128ff4c0e","schema_version":"1.0","event_id":"sha256:3bfb17f24f49e8bdd87329364653db082a6e866ef151b5e945dccd0128ff4c0e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:63WKBE6ASD3UQVVNL6VMAIX6F6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Next Generation Celestial Reference Frame","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.IM","authors_text":"Alan Fey, Anthony Beasley, Bryan Dorland, David Gordon, Frank Schinzel, Jeremy Darling, John Gipson, Joseph Lazio, Leonid Petrov, Lucas Hunt, Megan Johnson, Nathan Secrest, Walter Brisken","submitted_at":"2019-03-26T20:25:27Z","abstract_excerpt":"Astrometry, the measurement of positions and motions of the stars, is one of the oldest disciplines in Astronomy, extending back at least as far as Hipparchus' discovery of the precession of Earth's axes in 190 BCE by comparing his catalog with those of his predecessors. Astrometry is fundamental to Astronomy, and critical to many aspects of Astrophysics and Geodesy. In order to understand our planet's and solar system's context within their surroundings, we must be able to to define, quantify, study, refine, and maintain an inertial frame of reference relative to which all positions and motio"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.11145","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":"2026-05-17T23:50:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xi0USJJeQafrPqSbz5u1pSDTWRlIoX5EQRLEN/k81HB0ocoVezU0gcCld+nMC9HfHCStz7FK+59JFoMORDLkBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T23:53:26.282334Z"},"content_sha256":"52606ac7ecd7767143d0842df50457288f11b98085977ce94504dcba575acbfc","schema_version":"1.0","event_id":"sha256:52606ac7ecd7767143d0842df50457288f11b98085977ce94504dcba575acbfc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/63WKBE6ASD3UQVVNL6VMAIX6F6/bundle.json","state_url":"https://pith.science/pith/63WKBE6ASD3UQVVNL6VMAIX6F6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/63WKBE6ASD3UQVVNL6VMAIX6F6/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":"2026-05-24T23:53:26Z","links":{"resolver":"https://pith.science/pith/63WKBE6ASD3UQVVNL6VMAIX6F6","bundle":"https://pith.science/pith/63WKBE6ASD3UQVVNL6VMAIX6F6/bundle.json","state":"https://pith.science/pith/63WKBE6ASD3UQVVNL6VMAIX6F6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/63WKBE6ASD3UQVVNL6VMAIX6F6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:63WKBE6ASD3UQVVNL6VMAIX6F6","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":"ca96da4686a5a5c4812c3a20e7a77ae5bfe8a1f1e98827ceacec342d9caafcf4","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-03-26T20:25:27Z","title_canon_sha256":"918ef026fa062b2dec51e0b8ccc40476e58f9f27bb5f874901b264cbaf5bf335"},"schema_version":"1.0","source":{"id":"1903.11145","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.11145","created_at":"2026-05-17T23:50:04Z"},{"alias_kind":"arxiv_version","alias_value":"1903.11145v1","created_at":"2026-05-17T23:50:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.11145","created_at":"2026-05-17T23:50:04Z"},{"alias_kind":"pith_short_12","alias_value":"63WKBE6ASD3U","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_16","alias_value":"63WKBE6ASD3UQVVN","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_8","alias_value":"63WKBE6A","created_at":"2026-05-18T12:33:10Z"}],"graph_snapshots":[{"event_id":"sha256:52606ac7ecd7767143d0842df50457288f11b98085977ce94504dcba575acbfc","target":"graph","created_at":"2026-05-17T23:50:04Z","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":"Astrometry, the measurement of positions and motions of the stars, is one of the oldest disciplines in Astronomy, extending back at least as far as Hipparchus' discovery of the precession of Earth's axes in 190 BCE by comparing his catalog with those of his predecessors. Astrometry is fundamental to Astronomy, and critical to many aspects of Astrophysics and Geodesy. In order to understand our planet's and solar system's context within their surroundings, we must be able to to define, quantify, study, refine, and maintain an inertial frame of reference relative to which all positions and motio","authors_text":"Alan Fey, Anthony Beasley, Bryan Dorland, David Gordon, Frank Schinzel, Jeremy Darling, John Gipson, Joseph Lazio, Leonid Petrov, Lucas Hunt, Megan Johnson, Nathan Secrest, Walter Brisken","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-03-26T20:25:27Z","title":"The Next Generation Celestial Reference Frame"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.11145","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":"sha256:3bfb17f24f49e8bdd87329364653db082a6e866ef151b5e945dccd0128ff4c0e","target":"record","created_at":"2026-05-17T23:50:04Z","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":"ca96da4686a5a5c4812c3a20e7a77ae5bfe8a1f1e98827ceacec342d9caafcf4","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-03-26T20:25:27Z","title_canon_sha256":"918ef026fa062b2dec51e0b8ccc40476e58f9f27bb5f874901b264cbaf5bf335"},"schema_version":"1.0","source":{"id":"1903.11145","kind":"arxiv","version":1}},"canonical_sha256":"f6eca093c090f74856ad5faac022fe2f8a879c0533ba11a9d1729552383cb414","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f6eca093c090f74856ad5faac022fe2f8a879c0533ba11a9d1729552383cb414","first_computed_at":"2026-05-17T23:50:04.025641Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:50:04.025641Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"D4FwpQNOW2D8PHldXhOxfFOzvQTPeEciNj2nw+yOJG12ytV3ddnocRvCMx5fUZHG9BDA8mT3rt1IKfkbuB13DQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:50:04.026244Z","signed_message":"canonical_sha256_bytes"},"source_id":"1903.11145","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3bfb17f24f49e8bdd87329364653db082a6e866ef151b5e945dccd0128ff4c0e","sha256:52606ac7ecd7767143d0842df50457288f11b98085977ce94504dcba575acbfc"],"state_sha256":"786ce3388cea59519574011047e83ae6493e86a3ea53fcc76007673fa482ea98"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"E1DLviIcLXvQd8q8gRAJVYnR1PYeXOOj1z9Qo9c2fsESaXVK4dKnsuhcd+9PJMyigUl44Zw/UxOY4N1gymQECg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-24T23:53:26.285124Z","bundle_sha256":"ca9ba7b8065e0689d2c66bda42c8764e8854c566670efab077341689a2765580"}}