{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:AC4MD2PI4JZYMWKMATHSTI7Y3O","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":"f75dc3c6d880bee4853af1de8bb50b32bde15ea777cf8f140e2b285149381f32","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-11-19T11:19:33Z","title_canon_sha256":"5aecfef76975f8c798b4ec42ee3e63f0f20428c718bc5c0a761a94d2223dcf74"},"schema_version":"1.0","source":{"id":"2111.10159","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2111.10159","created_at":"2026-07-05T03:38:41Z"},{"alias_kind":"arxiv_version","alias_value":"2111.10159v2","created_at":"2026-07-05T03:38:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2111.10159","created_at":"2026-07-05T03:38:41Z"},{"alias_kind":"pith_short_12","alias_value":"AC4MD2PI4JZY","created_at":"2026-07-05T03:38:41Z"},{"alias_kind":"pith_short_16","alias_value":"AC4MD2PI4JZYMWKM","created_at":"2026-07-05T03:38:41Z"},{"alias_kind":"pith_short_8","alias_value":"AC4MD2PI","created_at":"2026-07-05T03:38:41Z"}],"graph_snapshots":[{"event_id":"sha256:386ff32fe3d16d619e4b73b953a8e64273ffc7d013b3d777d373a7243437c939","target":"graph","created_at":"2026-07-05T03:38:41Z","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/2111.10159/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Vela X-1 is a runaway X-ray binary system hosting a massive donor star, whose strong stellar wind creates a bow shock as it interacts with the interstellar medium. This bow shock has previously been detected in H$\\alpha$ and IR, but, similar to all but one bow shock from a massive runaway star (BD+43$^{\\rm o}$3654), has escaped detection in other wavebands. We report on the discovery of $1.3$ GHz radio emission from the Vela X-1 bow shock with the MeerKAT telescope. The MeerKAT observations reveal how the radio emission closely traces the H$\\alpha$ line emission, both in the bow shock and in t","authors_text":"G. R. Sivakoff, I. Heywood, J. C. A. Miller-Jones, J. van den Eijnden, P. A. Woudt, P. Saikia, R. Fender, S. Mohamed, S. Motta, T. D. Russell","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-11-19T11:19:33Z","title":"MeerKAT discovery of radio emission from the Vela X-1 bow shock"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2111.10159","kind":"arxiv","version":2},"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":"sha256:9e34c1a692e7aaa21a13fcfd002b687d0338fbc5b4001cd49e4c2c30cebfa6a6","target":"record","created_at":"2026-07-05T03:38:41Z","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":"f75dc3c6d880bee4853af1de8bb50b32bde15ea777cf8f140e2b285149381f32","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-11-19T11:19:33Z","title_canon_sha256":"5aecfef76975f8c798b4ec42ee3e63f0f20428c718bc5c0a761a94d2223dcf74"},"schema_version":"1.0","source":{"id":"2111.10159","kind":"arxiv","version":2}},"canonical_sha256":"00b8c1e9e8e27386594c04cf29a3f8dbbc933745512c364443d93b3d7748dedd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"00b8c1e9e8e27386594c04cf29a3f8dbbc933745512c364443d93b3d7748dedd","first_computed_at":"2026-07-05T03:38:41.511948Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:38:41.511948Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"U1Gjx5ADDMjhBHlMrDNwySevEZ58qV0UixilhbQfp8bDToIsRvAinTV+QClWzHPS8zTqQRGS/T40T8O+fG5uDA==","signature_status":"signed_v1","signed_at":"2026-07-05T03:38:41.512354Z","signed_message":"canonical_sha256_bytes"},"source_id":"2111.10159","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9e34c1a692e7aaa21a13fcfd002b687d0338fbc5b4001cd49e4c2c30cebfa6a6","sha256:386ff32fe3d16d619e4b73b953a8e64273ffc7d013b3d777d373a7243437c939"],"state_sha256":"5dbd9e6a502dc37f43a035d69c4c827f5e41dc1e877f67fd5eb797c54e0028c2"}