{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:VTPPTLKWZI2GL7VJ3QOEDTISNR","short_pith_number":"pith:VTPPTLKW","schema_version":"1.0","canonical_sha256":"acdef9ad56ca3465fea9dc1c41cd126c4936d323fe379b4b316bf700f8adfdba","source":{"kind":"arxiv","id":"1908.00973","version":1},"attestation_state":"computed","paper":{"title":"Observations of radio sources near the Sun","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Aletha de Witt, Alexei Melnikov, Andrei Mikhailov, Benedikt Soja, Bo Xia, Dmitrii Ivanov, Fengchun Shu, Jamie McCallum, Lucia McCallum, Masafumi Ishigaki, Matthias Schartner, Oleg Titov, Sang Oh Yi, Sebastien Lambert, Sergei Gulyaev, Stuart Weston, Tim Natusch, Wen Chen","submitted_at":"2019-08-02T00:53:44Z","abstract_excerpt":"Geodetic Very Long Baseline Interferometry (VLBI) data are capable of measuring the light deflection caused by the gravitational field of the Sun and large planets with high accuracy. The parameter $\\gamma$ of the parametrized Post-Newtonian (PPN) formalism estimated using observations of reference radio sources near the Sun should be equal to unity in the general relativity. We have run several VLBI experiments tracking reference radio sources from 1 to 3 degrees from the Sun. The best formal accuracy of the parameter $\\gamma$ achieved in the single-session mode is less than 0.01 percent, or "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1908.00973","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-08-02T00:53:44Z","cross_cats_sorted":[],"title_canon_sha256":"fd1c7d1957fa8f5ba5343f79c376174f57307bb3a1e5ea99462e73d9e61a6772","abstract_canon_sha256":"bcabbce3f52f52923c22b17bad58fab93299dc1073e193a879ac0e0064d05ab2"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T23:51:25.295792Z","signature_b64":"z0TuLnu5BgnP+H2EC66igRqZtCeBoqvAeV7a1N7hgcpcLLb8To0aRNMHDye87CuLeTCLVMxUfch3EGXtq3wGDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"acdef9ad56ca3465fea9dc1c41cd126c4936d323fe379b4b316bf700f8adfdba","last_reissued_at":"2026-07-04T23:51:25.295193Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T23:51:25.295193Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Observations of radio sources near the Sun","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Aletha de Witt, Alexei Melnikov, Andrei Mikhailov, Benedikt Soja, Bo Xia, Dmitrii Ivanov, Fengchun Shu, Jamie McCallum, Lucia McCallum, Masafumi Ishigaki, Matthias Schartner, Oleg Titov, Sang Oh Yi, Sebastien Lambert, Sergei Gulyaev, Stuart Weston, Tim Natusch, Wen Chen","submitted_at":"2019-08-02T00:53:44Z","abstract_excerpt":"Geodetic Very Long Baseline Interferometry (VLBI) data are capable of measuring the light deflection caused by the gravitational field of the Sun and large planets with high accuracy. The parameter $\\gamma$ of the parametrized Post-Newtonian (PPN) formalism estimated using observations of reference radio sources near the Sun should be equal to unity in the general relativity. We have run several VLBI experiments tracking reference radio sources from 1 to 3 degrees from the Sun. The best formal accuracy of the parameter $\\gamma$ achieved in the single-session mode is less than 0.01 percent, or "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.00973","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/1908.00973/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1908.00973","created_at":"2026-07-04T23:51:25.295267+00:00"},{"alias_kind":"arxiv_version","alias_value":"1908.00973v1","created_at":"2026-07-04T23:51:25.295267+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.00973","created_at":"2026-07-04T23:51:25.295267+00:00"},{"alias_kind":"pith_short_12","alias_value":"VTPPTLKWZI2G","created_at":"2026-07-04T23:51:25.295267+00:00"},{"alias_kind":"pith_short_16","alias_value":"VTPPTLKWZI2GL7VJ","created_at":"2026-07-04T23:51:25.295267+00:00"},{"alias_kind":"pith_short_8","alias_value":"VTPPTLKW","created_at":"2026-07-04T23:51:25.295267+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/VTPPTLKWZI2GL7VJ3QOEDTISNR","json":"https://pith.science/pith/VTPPTLKWZI2GL7VJ3QOEDTISNR.json","graph_json":"https://pith.science/api/pith-number/VTPPTLKWZI2GL7VJ3QOEDTISNR/graph.json","events_json":"https://pith.science/api/pith-number/VTPPTLKWZI2GL7VJ3QOEDTISNR/events.json","paper":"https://pith.science/paper/VTPPTLKW"},"agent_actions":{"view_html":"https://pith.science/pith/VTPPTLKWZI2GL7VJ3QOEDTISNR","download_json":"https://pith.science/pith/VTPPTLKWZI2GL7VJ3QOEDTISNR.json","view_paper":"https://pith.science/paper/VTPPTLKW","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1908.00973&json=true","fetch_graph":"https://pith.science/api/pith-number/VTPPTLKWZI2GL7VJ3QOEDTISNR/graph.json","fetch_events":"https://pith.science/api/pith-number/VTPPTLKWZI2GL7VJ3QOEDTISNR/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/VTPPTLKWZI2GL7VJ3QOEDTISNR/action/timestamp_anchor","attest_storage":"https://pith.science/pith/VTPPTLKWZI2GL7VJ3QOEDTISNR/action/storage_attestation","attest_author":"https://pith.science/pith/VTPPTLKWZI2GL7VJ3QOEDTISNR/action/author_attestation","sign_citation":"https://pith.science/pith/VTPPTLKWZI2GL7VJ3QOEDTISNR/action/citation_signature","submit_replication":"https://pith.science/pith/VTPPTLKWZI2GL7VJ3QOEDTISNR/action/replication_record"}},"created_at":"2026-07-04T23:51:25.295267+00:00","updated_at":"2026-07-04T23:51:25.295267+00:00"}