{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:IAHLWGWFJ67XVLVDKAD3HPH5Z3","short_pith_number":"pith:IAHLWGWF","canonical_record":{"source":{"id":"1212.6182","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-12-26T14:11:13Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"f4e1cdd72843ebf4c613a5f6224e03e5f557fcee32fee1eaab65ab37ac79549f","abstract_canon_sha256":"caafbdc01a80c0d7944ad06d89202f42a7ae06242373677d5c1a32436ff6ee7d"},"schema_version":"1.0"},"canonical_sha256":"400ebb1ac54fbf7aaea35007b3bcfdced76ffa735e92b7369a2592a7500e9603","source":{"kind":"arxiv","id":"1212.6182","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1212.6182","created_at":"2026-05-18T01:52:27Z"},{"alias_kind":"arxiv_version","alias_value":"1212.6182v1","created_at":"2026-05-18T01:52:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1212.6182","created_at":"2026-05-18T01:52:27Z"},{"alias_kind":"pith_short_12","alias_value":"IAHLWGWFJ67X","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_16","alias_value":"IAHLWGWFJ67XVLVD","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_8","alias_value":"IAHLWGWF","created_at":"2026-05-18T12:27:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:IAHLWGWFJ67XVLVDKAD3HPH5Z3","target":"record","payload":{"canonical_record":{"source":{"id":"1212.6182","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-12-26T14:11:13Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"f4e1cdd72843ebf4c613a5f6224e03e5f557fcee32fee1eaab65ab37ac79549f","abstract_canon_sha256":"caafbdc01a80c0d7944ad06d89202f42a7ae06242373677d5c1a32436ff6ee7d"},"schema_version":"1.0"},"canonical_sha256":"400ebb1ac54fbf7aaea35007b3bcfdced76ffa735e92b7369a2592a7500e9603","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:52:27.396486Z","signature_b64":"NMweRrI2yGJtZAJ+CVBOhXiqJb0TSZCT4VQCQ+etUyzKeHj35acRMRlG1wK0745tTz3xAljwHf+dMrwc+yT3Bw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"400ebb1ac54fbf7aaea35007b3bcfdced76ffa735e92b7369a2592a7500e9603","last_reissued_at":"2026-05-18T01:52:27.396047Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:52:27.396047Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1212.6182","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":"2026-05-18T01:52:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DPHzmduTnk1HpKvw/18iX6Jys+zbGnYsL4fBX1ontm5aa/IBojJnA+vxMgZSNGsBZe75+f3zx6obEdsl1Me5CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T20:31:31.193265Z"},"content_sha256":"863519612b65cb8a87ec854b112c897c27b062e6ee871c275c7a463e22c998d5","schema_version":"1.0","event_id":"sha256:863519612b65cb8a87ec854b112c897c27b062e6ee871c275c7a463e22c998d5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:IAHLWGWFJ67XVLVDKAD3HPH5Z3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Fourth US Naval Observatory CCD Astrograph Catalog (UCAC4)","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.IM","authors_text":"Arne Henden, Charlie Finch, Dave Monet, Jennifer Bartlett, Marion Zacharias, Norbert Zacharias, Terry Girard","submitted_at":"2012-12-26T14:11:13Z","abstract_excerpt":"The fourth United States Naval Observatory (USNO) CCD Astrograph Catalog, UCAC4 was released in August 2012 (double-sided DVD and CDS data center Vizier catalog I/322). It is the final release in this series and contains over 113 million objects; over 105 million of them with proper motions. UCAC4 is an updated version of UCAC3 with about the same number of stars also covering all-sky. Bugs were fixed, Schmidt plate survey data were avoided, and precise 5-band photometry were added. Astrograph observations have been supplemented for bright stars by FK6, Hipparcos and Tycho-2 data to compile a "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1212.6182","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":"2026-05-18T01:52:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"e+nC/jJqUDF95BdBgfQF5nUj9Z6lkVMGYlaJmlpK3zZ9i5bFY3DQFA43oaB/CQdjekWigjgugqkhQqvMvadWBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T20:31:31.193913Z"},"content_sha256":"443eb45bc5ca95ced7544bfddf761635722b74ab16c33467d318a56d2d859390","schema_version":"1.0","event_id":"sha256:443eb45bc5ca95ced7544bfddf761635722b74ab16c33467d318a56d2d859390"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IAHLWGWFJ67XVLVDKAD3HPH5Z3/bundle.json","state_url":"https://pith.science/pith/IAHLWGWFJ67XVLVDKAD3HPH5Z3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IAHLWGWFJ67XVLVDKAD3HPH5Z3/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":"2026-05-21T20:31:31Z","links":{"resolver":"https://pith.science/pith/IAHLWGWFJ67XVLVDKAD3HPH5Z3","bundle":"https://pith.science/pith/IAHLWGWFJ67XVLVDKAD3HPH5Z3/bundle.json","state":"https://pith.science/pith/IAHLWGWFJ67XVLVDKAD3HPH5Z3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IAHLWGWFJ67XVLVDKAD3HPH5Z3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:IAHLWGWFJ67XVLVDKAD3HPH5Z3","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":"caafbdc01a80c0d7944ad06d89202f42a7ae06242373677d5c1a32436ff6ee7d","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-12-26T14:11:13Z","title_canon_sha256":"f4e1cdd72843ebf4c613a5f6224e03e5f557fcee32fee1eaab65ab37ac79549f"},"schema_version":"1.0","source":{"id":"1212.6182","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1212.6182","created_at":"2026-05-18T01:52:27Z"},{"alias_kind":"arxiv_version","alias_value":"1212.6182v1","created_at":"2026-05-18T01:52:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1212.6182","created_at":"2026-05-18T01:52:27Z"},{"alias_kind":"pith_short_12","alias_value":"IAHLWGWFJ67X","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_16","alias_value":"IAHLWGWFJ67XVLVD","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_8","alias_value":"IAHLWGWF","created_at":"2026-05-18T12:27:09Z"}],"graph_snapshots":[{"event_id":"sha256:443eb45bc5ca95ced7544bfddf761635722b74ab16c33467d318a56d2d859390","target":"graph","created_at":"2026-05-18T01:52:27Z","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 fourth United States Naval Observatory (USNO) CCD Astrograph Catalog, UCAC4 was released in August 2012 (double-sided DVD and CDS data center Vizier catalog I/322). It is the final release in this series and contains over 113 million objects; over 105 million of them with proper motions. UCAC4 is an updated version of UCAC3 with about the same number of stars also covering all-sky. Bugs were fixed, Schmidt plate survey data were avoided, and precise 5-band photometry were added. Astrograph observations have been supplemented for bright stars by FK6, Hipparcos and Tycho-2 data to compile a ","authors_text":"Arne Henden, Charlie Finch, Dave Monet, Jennifer Bartlett, Marion Zacharias, Norbert Zacharias, Terry Girard","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-12-26T14:11:13Z","title":"The Fourth US Naval Observatory CCD Astrograph Catalog (UCAC4)"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1212.6182","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":"sha256:863519612b65cb8a87ec854b112c897c27b062e6ee871c275c7a463e22c998d5","target":"record","created_at":"2026-05-18T01:52:27Z","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":"caafbdc01a80c0d7944ad06d89202f42a7ae06242373677d5c1a32436ff6ee7d","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-12-26T14:11:13Z","title_canon_sha256":"f4e1cdd72843ebf4c613a5f6224e03e5f557fcee32fee1eaab65ab37ac79549f"},"schema_version":"1.0","source":{"id":"1212.6182","kind":"arxiv","version":1}},"canonical_sha256":"400ebb1ac54fbf7aaea35007b3bcfdced76ffa735e92b7369a2592a7500e9603","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"400ebb1ac54fbf7aaea35007b3bcfdced76ffa735e92b7369a2592a7500e9603","first_computed_at":"2026-05-18T01:52:27.396047Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:52:27.396047Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NMweRrI2yGJtZAJ+CVBOhXiqJb0TSZCT4VQCQ+etUyzKeHj35acRMRlG1wK0745tTz3xAljwHf+dMrwc+yT3Bw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:52:27.396486Z","signed_message":"canonical_sha256_bytes"},"source_id":"1212.6182","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:863519612b65cb8a87ec854b112c897c27b062e6ee871c275c7a463e22c998d5","sha256:443eb45bc5ca95ced7544bfddf761635722b74ab16c33467d318a56d2d859390"],"state_sha256":"3b9d9a13985e78b51c424a934e0c08b4a0d0c722dfdf75897af9aee1d50f0cc5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QklGm4FllzBIzWSS9Kzhzs3qd592d6NPSulS3g0PHXvv8G/Mfnwuz65t+srdl336cFX28Ew5FyamcGpn1Cz7Dg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-21T20:31:31.197258Z","bundle_sha256":"72efb96f387b4d3d86c50b3fb59fa27f67f775fc309d0dc58254f625b6923fc1"}}