{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:APKNJY4WUXGEDK4UI7W63VTGES","short_pith_number":"pith:APKNJY4W","schema_version":"1.0","canonical_sha256":"03d4d4e396a5cc41ab9447ededd66624a4fddf59a991cae451fc78a1561eeb78","source":{"kind":"arxiv","id":"1812.03671","version":2},"attestation_state":"computed","paper":{"title":"Observation angles, Fermi coordinates, and the Geodesic-Light-Cone gauge","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","hep-th"],"primary_cat":"astro-ph.CO","authors_text":"Gabriele Veneziano, Giovanni Marozzi, Giuseppe Fanizza, Maurizio Gasperini","submitted_at":"2018-12-10T08:32:17Z","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"},"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":"1812.03671","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-12-10T08:32:17Z","cross_cats_sorted":["gr-qc","hep-th"],"title_canon_sha256":"465b60f0f76542c67b4f292df81a3768838b58b4e39ca4600854b9d9222b4db5","abstract_canon_sha256":"a9d050a4d29013777d8748e61584ed4eaf8838abeed9aff8af3d6781bd5dc2d4"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:56:52.529537Z","signature_b64":"LiqLjI1OBnrvgSUcXBN1qPGIQBnWNMlEBqlDOn6EI5vNiy4//EsfbyM+DhzdLus4e40+/QF546+K19hip8gtCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"03d4d4e396a5cc41ab9447ededd66624a4fddf59a991cae451fc78a1561eeb78","last_reissued_at":"2026-05-17T23:56:52.529139Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:56:52.529139Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Observation angles, Fermi coordinates, and the Geodesic-Light-Cone gauge","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","hep-th"],"primary_cat":"astro-ph.CO","authors_text":"Gabriele Veneziano, Giovanni Marozzi, Giuseppe Fanizza, Maurizio Gasperini","submitted_at":"2018-12-10T08:32:17Z","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"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.03671","kind":"arxiv","version":2},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1812.03671","created_at":"2026-05-17T23:56:52.529196+00:00"},{"alias_kind":"arxiv_version","alias_value":"1812.03671v2","created_at":"2026-05-17T23:56:52.529196+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.03671","created_at":"2026-05-17T23:56:52.529196+00:00"},{"alias_kind":"pith_short_12","alias_value":"APKNJY4WUXGE","created_at":"2026-05-18T12:32:13.499390+00:00"},{"alias_kind":"pith_short_16","alias_value":"APKNJY4WUXGEDK4U","created_at":"2026-05-18T12:32:13.499390+00:00"},{"alias_kind":"pith_short_8","alias_value":"APKNJY4W","created_at":"2026-05-18T12:32:13.499390+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2604.26690","citing_title":"Nonlinear Relativistic Effects on Cosmological Redshift Drift","ref_index":53,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/APKNJY4WUXGEDK4UI7W63VTGES","json":"https://pith.science/pith/APKNJY4WUXGEDK4UI7W63VTGES.json","graph_json":"https://pith.science/api/pith-number/APKNJY4WUXGEDK4UI7W63VTGES/graph.json","events_json":"https://pith.science/api/pith-number/APKNJY4WUXGEDK4UI7W63VTGES/events.json","paper":"https://pith.science/paper/APKNJY4W"},"agent_actions":{"view_html":"https://pith.science/pith/APKNJY4WUXGEDK4UI7W63VTGES","download_json":"https://pith.science/pith/APKNJY4WUXGEDK4UI7W63VTGES.json","view_paper":"https://pith.science/paper/APKNJY4W","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1812.03671&json=true","fetch_graph":"https://pith.science/api/pith-number/APKNJY4WUXGEDK4UI7W63VTGES/graph.json","fetch_events":"https://pith.science/api/pith-number/APKNJY4WUXGEDK4UI7W63VTGES/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/APKNJY4WUXGEDK4UI7W63VTGES/action/timestamp_anchor","attest_storage":"https://pith.science/pith/APKNJY4WUXGEDK4UI7W63VTGES/action/storage_attestation","attest_author":"https://pith.science/pith/APKNJY4WUXGEDK4UI7W63VTGES/action/author_attestation","sign_citation":"https://pith.science/pith/APKNJY4WUXGEDK4UI7W63VTGES/action/citation_signature","submit_replication":"https://pith.science/pith/APKNJY4WUXGEDK4UI7W63VTGES/action/replication_record"}},"created_at":"2026-05-17T23:56:52.529196+00:00","updated_at":"2026-05-17T23:56:52.529196+00:00"}