{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:APKNJY4WUXGEDK4UI7W63VTGES","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":"a9d050a4d29013777d8748e61584ed4eaf8838abeed9aff8af3d6781bd5dc2d4","cross_cats_sorted":["gr-qc","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-12-10T08:32:17Z","title_canon_sha256":"465b60f0f76542c67b4f292df81a3768838b58b4e39ca4600854b9d9222b4db5"},"schema_version":"1.0","source":{"id":"1812.03671","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.03671","created_at":"2026-05-17T23:56:52Z"},{"alias_kind":"arxiv_version","alias_value":"1812.03671v2","created_at":"2026-05-17T23:56:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.03671","created_at":"2026-05-17T23:56:52Z"},{"alias_kind":"pith_short_12","alias_value":"APKNJY4WUXGE","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_16","alias_value":"APKNJY4WUXGEDK4U","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_8","alias_value":"APKNJY4W","created_at":"2026-05-18T12:32:13Z"}],"graph_snapshots":[{"event_id":"sha256:1e281bee479d51f86a785a676c3c93e040f34eaf1323606e06cd211878ecd0a0","target":"graph","created_at":"2026-05-17T23:56:52Z","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":"We show that the angular directions locally measured by a static geodesic observer in a generic cosmological background and expressed in the system of Fermi Normal Coordinates always coincide with those expressed in the Geodesic-Light-Cone (GLC) gauge, up to a local transformation which exploits the residual gauge freedom of the GLC coordinates. This is not the case for other gauges - like, for instance, the synchronous and longitudinal gauge - commonly used in the context of observational cosmology. We also make an explicit proposal for the GLC gauge-fixing condition that ensures a full ident","authors_text":"Gabriele Veneziano, Giovanni Marozzi, Giuseppe Fanizza, Maurizio Gasperini","cross_cats":["gr-qc","hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-12-10T08:32:17Z","title":"Observation angles, Fermi coordinates, and the Geodesic-Light-Cone gauge"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.03671","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":"sha256:0dc09f880bf2a7c4b54f3205bcf0aeab22ce34e5bb5c12fee8249218c5c4ce3e","target":"record","created_at":"2026-05-17T23:56:52Z","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":"a9d050a4d29013777d8748e61584ed4eaf8838abeed9aff8af3d6781bd5dc2d4","cross_cats_sorted":["gr-qc","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-12-10T08:32:17Z","title_canon_sha256":"465b60f0f76542c67b4f292df81a3768838b58b4e39ca4600854b9d9222b4db5"},"schema_version":"1.0","source":{"id":"1812.03671","kind":"arxiv","version":2}},"canonical_sha256":"03d4d4e396a5cc41ab9447ededd66624a4fddf59a991cae451fc78a1561eeb78","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"03d4d4e396a5cc41ab9447ededd66624a4fddf59a991cae451fc78a1561eeb78","first_computed_at":"2026-05-17T23:56:52.529139Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:56:52.529139Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LiqLjI1OBnrvgSUcXBN1qPGIQBnWNMlEBqlDOn6EI5vNiy4//EsfbyM+DhzdLus4e40+/QF546+K19hip8gtCw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:56:52.529537Z","signed_message":"canonical_sha256_bytes"},"source_id":"1812.03671","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0dc09f880bf2a7c4b54f3205bcf0aeab22ce34e5bb5c12fee8249218c5c4ce3e","sha256:1e281bee479d51f86a785a676c3c93e040f34eaf1323606e06cd211878ecd0a0"],"state_sha256":"8560d25187c6b513aa5e26f7e7751c00314605df576bad798d220cf69582a26b"}