{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:F4EFJJIZW6UJBPEAL2SK7IV4SI","short_pith_number":"pith:F4EFJJIZ","canonical_record":{"source":{"id":"1906.08264","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-06-19T18:00:00Z","cross_cats_sorted":["astro-ph.EP","astro-ph.GA"],"title_canon_sha256":"cdf8399b378e34ee147a7f482891f0aaa4c1cd39d2264dc938d08ffed7d5524e","abstract_canon_sha256":"b28aa44104d4cd60bccbd10262a4422a6c59410deaed9fc638e8a07872db37bd"},"schema_version":"1.0"},"canonical_sha256":"2f0854a519b7a890bc805ea4afa2bc9238eeb9ef4da22ee3eba843427057ebad","source":{"kind":"arxiv","id":"1906.08264","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.08264","created_at":"2026-05-17T23:42:52Z"},{"alias_kind":"arxiv_version","alias_value":"1906.08264v1","created_at":"2026-05-17T23:42:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.08264","created_at":"2026-05-17T23:42:52Z"},{"alias_kind":"pith_short_12","alias_value":"F4EFJJIZW6UJ","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"F4EFJJIZW6UJBPEA","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"F4EFJJIZ","created_at":"2026-05-18T12:33:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:F4EFJJIZW6UJBPEAL2SK7IV4SI","target":"record","payload":{"canonical_record":{"source":{"id":"1906.08264","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-06-19T18:00:00Z","cross_cats_sorted":["astro-ph.EP","astro-ph.GA"],"title_canon_sha256":"cdf8399b378e34ee147a7f482891f0aaa4c1cd39d2264dc938d08ffed7d5524e","abstract_canon_sha256":"b28aa44104d4cd60bccbd10262a4422a6c59410deaed9fc638e8a07872db37bd"},"schema_version":"1.0"},"canonical_sha256":"2f0854a519b7a890bc805ea4afa2bc9238eeb9ef4da22ee3eba843427057ebad","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:42:52.912139Z","signature_b64":"dafHmDnuzITVJXZVkZRKRXdFX4JAuxkDe15GwNh3BXp30HPrWe/bEnCvLfR7hJ1mk0cpewNkJsUXUYSugQvwAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2f0854a519b7a890bc805ea4afa2bc9238eeb9ef4da22ee3eba843427057ebad","last_reissued_at":"2026-05-17T23:42:52.911608Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:42:52.911608Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1906.08264","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":"2026-05-17T23:42:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jcCAMLlTWAPwFTZEuwGHpA+v6dI74fL5SfMFdvvth4pRWnO9Ge5liXit7vnsesIVtWykg6eSL1GNqxqSdSPzCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T04:44:54.370886Z"},"content_sha256":"3c614ce4e710f0c46aee6823cffdb7220b93bbf2d5d1f10dcbb4eca576ae25b2","schema_version":"1.0","event_id":"sha256:3c614ce4e710f0c46aee6823cffdb7220b93bbf2d5d1f10dcbb4eca576ae25b2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:F4EFJJIZW6UJBPEAL2SK7IV4SI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Directly testing gravity with Proxima Centauri","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.EP","astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Indranil Banik, Pavel Kroupa","submitted_at":"2019-06-19T18:00:00Z","abstract_excerpt":"The wide binary orbit of Proxima Centauri around $\\alpha$ Centauri A and B differs significantly between Newtonian and Milgromian dynamics (MOND). By combining previous calculations of this effect with mock observations generated using a Monte Carlo procedure, we show that this prediction can be tested using high precision astrometry of Proxima Centauri. This requires ${\\approx 10}$ years of observations at an individual epoch precision of $0.5 \\, \\mu$as, within the design specifications of the proposed Theia mission. In general, the required duration should scale as the 2/5 power of the astro"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.08264","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":"2026-05-17T23:42:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"E6iKp9BM3MNQr7OO/OCYFe03WaqftzdTCqmel+q8HYMmH9RRHppCNsHm0y9+r4OQDYWzHORU/xoDm/4kk1cSCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T04:44:54.371576Z"},"content_sha256":"ac7d6cf8f8f7fbfd88d986468e7673aa5ce64a9aee32094d190f043c3726c9d7","schema_version":"1.0","event_id":"sha256:ac7d6cf8f8f7fbfd88d986468e7673aa5ce64a9aee32094d190f043c3726c9d7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/F4EFJJIZW6UJBPEAL2SK7IV4SI/bundle.json","state_url":"https://pith.science/pith/F4EFJJIZW6UJBPEAL2SK7IV4SI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/F4EFJJIZW6UJBPEAL2SK7IV4SI/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":"2026-05-26T04:44:54Z","links":{"resolver":"https://pith.science/pith/F4EFJJIZW6UJBPEAL2SK7IV4SI","bundle":"https://pith.science/pith/F4EFJJIZW6UJBPEAL2SK7IV4SI/bundle.json","state":"https://pith.science/pith/F4EFJJIZW6UJBPEAL2SK7IV4SI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/F4EFJJIZW6UJBPEAL2SK7IV4SI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:F4EFJJIZW6UJBPEAL2SK7IV4SI","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":"b28aa44104d4cd60bccbd10262a4422a6c59410deaed9fc638e8a07872db37bd","cross_cats_sorted":["astro-ph.EP","astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-06-19T18:00:00Z","title_canon_sha256":"cdf8399b378e34ee147a7f482891f0aaa4c1cd39d2264dc938d08ffed7d5524e"},"schema_version":"1.0","source":{"id":"1906.08264","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.08264","created_at":"2026-05-17T23:42:52Z"},{"alias_kind":"arxiv_version","alias_value":"1906.08264v1","created_at":"2026-05-17T23:42:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.08264","created_at":"2026-05-17T23:42:52Z"},{"alias_kind":"pith_short_12","alias_value":"F4EFJJIZW6UJ","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"F4EFJJIZW6UJBPEA","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"F4EFJJIZ","created_at":"2026-05-18T12:33:15Z"}],"graph_snapshots":[{"event_id":"sha256:ac7d6cf8f8f7fbfd88d986468e7673aa5ce64a9aee32094d190f043c3726c9d7","target":"graph","created_at":"2026-05-17T23:42:52Z","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 wide binary orbit of Proxima Centauri around $\\alpha$ Centauri A and B differs significantly between Newtonian and Milgromian dynamics (MOND). By combining previous calculations of this effect with mock observations generated using a Monte Carlo procedure, we show that this prediction can be tested using high precision astrometry of Proxima Centauri. This requires ${\\approx 10}$ years of observations at an individual epoch precision of $0.5 \\, \\mu$as, within the design specifications of the proposed Theia mission. In general, the required duration should scale as the 2/5 power of the astro","authors_text":"Indranil Banik, Pavel Kroupa","cross_cats":["astro-ph.EP","astro-ph.GA"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-06-19T18:00:00Z","title":"Directly testing gravity with Proxima Centauri"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.08264","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":"sha256:3c614ce4e710f0c46aee6823cffdb7220b93bbf2d5d1f10dcbb4eca576ae25b2","target":"record","created_at":"2026-05-17T23:42:52Z","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":"b28aa44104d4cd60bccbd10262a4422a6c59410deaed9fc638e8a07872db37bd","cross_cats_sorted":["astro-ph.EP","astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-06-19T18:00:00Z","title_canon_sha256":"cdf8399b378e34ee147a7f482891f0aaa4c1cd39d2264dc938d08ffed7d5524e"},"schema_version":"1.0","source":{"id":"1906.08264","kind":"arxiv","version":1}},"canonical_sha256":"2f0854a519b7a890bc805ea4afa2bc9238eeb9ef4da22ee3eba843427057ebad","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2f0854a519b7a890bc805ea4afa2bc9238eeb9ef4da22ee3eba843427057ebad","first_computed_at":"2026-05-17T23:42:52.911608Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:42:52.911608Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dafHmDnuzITVJXZVkZRKRXdFX4JAuxkDe15GwNh3BXp30HPrWe/bEnCvLfR7hJ1mk0cpewNkJsUXUYSugQvwAg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:42:52.912139Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.08264","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3c614ce4e710f0c46aee6823cffdb7220b93bbf2d5d1f10dcbb4eca576ae25b2","sha256:ac7d6cf8f8f7fbfd88d986468e7673aa5ce64a9aee32094d190f043c3726c9d7"],"state_sha256":"3bc606d0f27df1db8ca660728a877d11e77536429902c7e914022ad9d23bd0c6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"owE4VBNWOV5AF3y9tYz9KWaQY/g7q9YP2cMKrSM0si0MmSnTUZF7j5iB9qVMef+/mrN3Tg1YvzxbxQOlfoeCAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T04:44:54.375131Z","bundle_sha256":"1c5b7aa3231e23f9cd4abe89977286ccad3a95e415708593073f9a897e778268"}}