{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:PPQQ65JXNWH3GBZZFSNO5NSSTX","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":"0740436dc9b6ea90b9d0256f89deffff04d26e1d55bb05c8bef36fd669e2aed3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-11-09T17:19:22Z","title_canon_sha256":"af0ffeb4902493f2b3e5bc0dc6da16721eb0571a4fec4e70f919d443f0859a86"},"schema_version":"1.0","source":{"id":"2311.05527","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2311.05527","created_at":"2026-07-05T09:14:17Z"},{"alias_kind":"arxiv_version","alias_value":"2311.05527v3","created_at":"2026-07-05T09:14:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2311.05527","created_at":"2026-07-05T09:14:17Z"},{"alias_kind":"pith_short_12","alias_value":"PPQQ65JXNWH3","created_at":"2026-07-05T09:14:17Z"},{"alias_kind":"pith_short_16","alias_value":"PPQQ65JXNWH3GBZZ","created_at":"2026-07-05T09:14:17Z"},{"alias_kind":"pith_short_8","alias_value":"PPQQ65JX","created_at":"2026-07-05T09:14:17Z"}],"graph_snapshots":[{"event_id":"sha256:500d10b520c069da0041dc50d244cf8db6799e9dc659fee6f3721a0cf0f0d88e","target":"graph","created_at":"2026-07-05T09:14:17Z","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/2311.05527/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We observed $\\gamma$-ray burst (GRB) 221009A using very long baseline interferomety (VLBI) with the European VLBI Network (EVN) and the Very Long Baseline Array (VLBA), over a period spanning from 40 to 262 days after the initial GRB. The high angular resolution (mas) of our observations allowed us, for the second time ever, after GRB 030329, to measure the projected size, $s$, of the relativistic shock caused by the expansion of the GRB ejecta into the surrounding medium. Our observations support the expansion of the shock with a $>4\\sigma$-equivalent significance, and confirm its relativisti","authors_text":"A. J. van der Horst, B. Marcote, G. Anderson, G. Ghirlanda, J. K. Leung, J. S. Bright, J. Yang, L. Rhodes, M. Giroletti, M. P\\'erez-Torres, O. S. Salafia, P. Atri, R. Fender, S. E. Motta, S. Giarratana, T. An, W. Farah","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-11-09T17:19:22Z","title":"The expansion of the GRB 221009A afterglow"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2311.05527","kind":"arxiv","version":3},"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":"sha256:8141b3fc85d1515f0bfd3fcdf7eed6fc9e3903cefc183e0770819bfb7ed089ba","target":"record","created_at":"2026-07-05T09:14:17Z","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":"0740436dc9b6ea90b9d0256f89deffff04d26e1d55bb05c8bef36fd669e2aed3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-11-09T17:19:22Z","title_canon_sha256":"af0ffeb4902493f2b3e5bc0dc6da16721eb0571a4fec4e70f919d443f0859a86"},"schema_version":"1.0","source":{"id":"2311.05527","kind":"arxiv","version":3}},"canonical_sha256":"7be10f75376d8fb307392c9aeeb6529dd4558e490ee1a5555233154499840b38","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7be10f75376d8fb307392c9aeeb6529dd4558e490ee1a5555233154499840b38","first_computed_at":"2026-07-05T09:14:17.309556Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T09:14:17.309556Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"G3H2oPDYgoQjoRlUEN5+dzKEZsTXRyJPkgxUaya8c4pLRNg8yPP7yEQvT7G0Eq1EssV6D30TjGyybqccqMMVDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T09:14:17.310065Z","signed_message":"canonical_sha256_bytes"},"source_id":"2311.05527","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8141b3fc85d1515f0bfd3fcdf7eed6fc9e3903cefc183e0770819bfb7ed089ba","sha256:500d10b520c069da0041dc50d244cf8db6799e9dc659fee6f3721a0cf0f0d88e"],"state_sha256":"40e1d4436b5136e757850fde2caa07c7c0f041ba184fd1fc7013928c5179f426"}