{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:LLKHUBSFVQLEP7ZKHIF7LM4VHN","short_pith_number":"pith:LLKHUBSF","canonical_record":{"source":{"id":"1904.05721","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-04-11T14:34:00Z","cross_cats_sorted":[],"title_canon_sha256":"af212e8ba9650df2817fba2943da28e2f9211a81daffa29245710cd18db1566e","abstract_canon_sha256":"f66566ad52c03c4328beb2b38183be6253bd85799f92b3c0d4ff4f22b2de617a"},"schema_version":"1.0"},"canonical_sha256":"5ad47a0645ac1647ff2a3a0bf5b3953b5fe8887f3602282d43bd7b0056f152de","source":{"kind":"arxiv","id":"1904.05721","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.05721","created_at":"2026-07-05T00:11:33Z"},{"alias_kind":"arxiv_version","alias_value":"1904.05721v1","created_at":"2026-07-05T00:11:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.05721","created_at":"2026-07-05T00:11:33Z"},{"alias_kind":"pith_short_12","alias_value":"LLKHUBSFVQLE","created_at":"2026-07-05T00:11:33Z"},{"alias_kind":"pith_short_16","alias_value":"LLKHUBSFVQLEP7ZK","created_at":"2026-07-05T00:11:33Z"},{"alias_kind":"pith_short_8","alias_value":"LLKHUBSF","created_at":"2026-07-05T00:11:33Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:LLKHUBSFVQLEP7ZKHIF7LM4VHN","target":"record","payload":{"canonical_record":{"source":{"id":"1904.05721","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-04-11T14:34:00Z","cross_cats_sorted":[],"title_canon_sha256":"af212e8ba9650df2817fba2943da28e2f9211a81daffa29245710cd18db1566e","abstract_canon_sha256":"f66566ad52c03c4328beb2b38183be6253bd85799f92b3c0d4ff4f22b2de617a"},"schema_version":"1.0"},"canonical_sha256":"5ad47a0645ac1647ff2a3a0bf5b3953b5fe8887f3602282d43bd7b0056f152de","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:11:33.531810Z","signature_b64":"rPOSMKSjz9ma520zxEsBcocVPolhCbiXxshmqdpm3d7AsFHWSJ6A6M/POcywY5yhVosVhrzjPJjTxrFTmzAEBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5ad47a0645ac1647ff2a3a0bf5b3953b5fe8887f3602282d43bd7b0056f152de","last_reissued_at":"2026-07-05T00:11:33.531304Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:11:33.531304Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1904.05721","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":"2026-07-05T00:11:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"p3MQi894K2JGDMuSfXoBjpDc03Q6j5PYFjlcViCy5NRC9Kbb44OgT+mdNopbs3T/O3xBLDey5+mMzvdvmGVeBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T17:04:05.112178Z"},"content_sha256":"7edb8b85141b987e9977586dfacad97bdb25c2930a79c53c6a145de6a77a83ab","schema_version":"1.0","event_id":"sha256:7edb8b85141b987e9977586dfacad97bdb25c2930a79c53c6a145de6a77a83ab"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:LLKHUBSFVQLEP7ZKHIF7LM4VHN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A geometric distance measurement to the Galactic Center black hole with 0.3% uncertainty","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Amorim, A. Eckart, A. Jimenez-Rosales, A. Sternberg, C. Straubmeier, E. Gendron, E. Sturm, E. Wieprecht, E. Wiezorrek, F. Eisenhauer, F. Gao, F. Vincent, F. Widmann, G. Duvert, G. Perrin, G. Rodriguez Coira, G. Rousset, H. Bonnet, I. Waisberg, J.-B. Le Bouquin, J. Dexter, J.P. Berger, J. Woillez, K. Perraut, L. Jocou, L.J. Tacconi, M. Bauboeck, M. Habibi, M. Horrobin, N.M. Foerster Schreiber, O. Gerhard, O. Pfuhl, O. Straub, P. Garcia, P. Kervella, P. Lena, P.T. de Zeeuw, R. Abuter, R. Genzel, S. Gillessen, S. Hippler, S. Lacour, S. Rabien, S. Scheithauer, S. von Fellenberg, S. Yazici (The GRAVITY Collaboration), T. Henning, T. Ott, T. Paumard, V. Coude du Foresto, V. Lapeyrere, W. Brandner, X. Haubois, Y. Clenet","submitted_at":"2019-04-11T14:34:00Z","abstract_excerpt":"We present a 0.16% precise and 0.27% accurate determination of R0, the distance to the Galactic Center. Our measurement uses the star S2 on its 16-year orbit around the massive black hole Sgr A* that we followed astrometrically and spectroscopically for 27 years. Since 2017, we added near-infrared interferometry with the VLTI beam combiner GRAVITY, yielding a direct measurement of the separation vector between S2 and Sgr A* with an accuracy as good as 20 micro-arcsec in the best cases. S2 passed the pericenter of its highly eccentric orbit in May 2018, and we followed the passage with dense sa"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.05721","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1904.05721/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T00:11:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UMzywpgikq0VyHEjeMpd03N2IMWKDICu7kdM+dDeLsH2DC53Hi3d3X8G4aZ3BVsoo6nFNJueYeW/Hkf0a/FICQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T17:04:05.112784Z"},"content_sha256":"4f04bb6b923423c26be92b2fdc6ef8d5aa345c68eeee8156bb3450427a93d163","schema_version":"1.0","event_id":"sha256:4f04bb6b923423c26be92b2fdc6ef8d5aa345c68eeee8156bb3450427a93d163"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LLKHUBSFVQLEP7ZKHIF7LM4VHN/bundle.json","state_url":"https://pith.science/pith/LLKHUBSFVQLEP7ZKHIF7LM4VHN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LLKHUBSFVQLEP7ZKHIF7LM4VHN/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":"2026-08-05T17:04:05Z","links":{"resolver":"https://pith.science/pith/LLKHUBSFVQLEP7ZKHIF7LM4VHN","bundle":"https://pith.science/pith/LLKHUBSFVQLEP7ZKHIF7LM4VHN/bundle.json","state":"https://pith.science/pith/LLKHUBSFVQLEP7ZKHIF7LM4VHN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LLKHUBSFVQLEP7ZKHIF7LM4VHN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:LLKHUBSFVQLEP7ZKHIF7LM4VHN","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":"f66566ad52c03c4328beb2b38183be6253bd85799f92b3c0d4ff4f22b2de617a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-04-11T14:34:00Z","title_canon_sha256":"af212e8ba9650df2817fba2943da28e2f9211a81daffa29245710cd18db1566e"},"schema_version":"1.0","source":{"id":"1904.05721","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.05721","created_at":"2026-07-05T00:11:33Z"},{"alias_kind":"arxiv_version","alias_value":"1904.05721v1","created_at":"2026-07-05T00:11:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.05721","created_at":"2026-07-05T00:11:33Z"},{"alias_kind":"pith_short_12","alias_value":"LLKHUBSFVQLE","created_at":"2026-07-05T00:11:33Z"},{"alias_kind":"pith_short_16","alias_value":"LLKHUBSFVQLEP7ZK","created_at":"2026-07-05T00:11:33Z"},{"alias_kind":"pith_short_8","alias_value":"LLKHUBSF","created_at":"2026-07-05T00:11:33Z"}],"graph_snapshots":[{"event_id":"sha256:4f04bb6b923423c26be92b2fdc6ef8d5aa345c68eeee8156bb3450427a93d163","target":"graph","created_at":"2026-07-05T00:11:33Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1904.05721/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present a 0.16% precise and 0.27% accurate determination of R0, the distance to the Galactic Center. Our measurement uses the star S2 on its 16-year orbit around the massive black hole Sgr A* that we followed astrometrically and spectroscopically for 27 years. Since 2017, we added near-infrared interferometry with the VLTI beam combiner GRAVITY, yielding a direct measurement of the separation vector between S2 and Sgr A* with an accuracy as good as 20 micro-arcsec in the best cases. S2 passed the pericenter of its highly eccentric orbit in May 2018, and we followed the passage with dense sa","authors_text":"A. Amorim, A. Eckart, A. Jimenez-Rosales, A. Sternberg, C. Straubmeier, E. Gendron, E. Sturm, E. Wieprecht, E. Wiezorrek, F. Eisenhauer, F. Gao, F. Vincent, F. Widmann, G. Duvert, G. Perrin, G. Rodriguez Coira, G. Rousset, H. Bonnet, I. Waisberg, J.-B. Le Bouquin, J. Dexter, J.P. Berger, J. Woillez, K. Perraut, L. Jocou, L.J. Tacconi, M. Bauboeck, M. Habibi, M. Horrobin, N.M. Foerster Schreiber, O. Gerhard, O. Pfuhl, O. Straub, P. Garcia, P. Kervella, P. Lena, P.T. de Zeeuw, R. Abuter, R. Genzel, S. Gillessen, S. Hippler, S. Lacour, S. Rabien, S. Scheithauer, S. von Fellenberg, S. Yazici (The GRAVITY Collaboration), T. Henning, T. Ott, T. Paumard, V. Coude du Foresto, V. Lapeyrere, W. Brandner, X. Haubois, Y. Clenet","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-04-11T14:34:00Z","title":"A geometric distance measurement to the Galactic Center black hole with 0.3% uncertainty"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.05721","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":"sha256:7edb8b85141b987e9977586dfacad97bdb25c2930a79c53c6a145de6a77a83ab","target":"record","created_at":"2026-07-05T00:11:33Z","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":"f66566ad52c03c4328beb2b38183be6253bd85799f92b3c0d4ff4f22b2de617a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-04-11T14:34:00Z","title_canon_sha256":"af212e8ba9650df2817fba2943da28e2f9211a81daffa29245710cd18db1566e"},"schema_version":"1.0","source":{"id":"1904.05721","kind":"arxiv","version":1}},"canonical_sha256":"5ad47a0645ac1647ff2a3a0bf5b3953b5fe8887f3602282d43bd7b0056f152de","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5ad47a0645ac1647ff2a3a0bf5b3953b5fe8887f3602282d43bd7b0056f152de","first_computed_at":"2026-07-05T00:11:33.531304Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:11:33.531304Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rPOSMKSjz9ma520zxEsBcocVPolhCbiXxshmqdpm3d7AsFHWSJ6A6M/POcywY5yhVosVhrzjPJjTxrFTmzAEBg==","signature_status":"signed_v1","signed_at":"2026-07-05T00:11:33.531810Z","signed_message":"canonical_sha256_bytes"},"source_id":"1904.05721","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7edb8b85141b987e9977586dfacad97bdb25c2930a79c53c6a145de6a77a83ab","sha256:4f04bb6b923423c26be92b2fdc6ef8d5aa345c68eeee8156bb3450427a93d163"],"state_sha256":"949fca9b767a61b4a4cd74cfaff6905958061052f8ce01b5f0d41a4eed937455"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JxkT05yQ/yeQXS6EIR21BR11+ZMWFFUM/pkjN6h/tbRGBstyaYmx//49PxxmAFCWYbo8Xm5CU1gKDpKqwIU9Aw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T17:04:05.117295Z","bundle_sha256":"db5d3dfbbb856ae225b4ebd3c2a32bd4f46abb10bf0363b9e0a5992203ae8149"}}