{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2014:ZL2FQS5RFJI32JNFLKFINTFCGE","short_pith_number":"pith:ZL2FQS5R","schema_version":"1.0","canonical_sha256":"caf4584bb12a51bd25a55a8a86cca2311e35e27a7d3226fddddd878f727dd8a5","source":{"kind":"arxiv","id":"1408.4277","version":1},"attestation_state":"computed","paper":{"title":"C metric: the equatorial plane and Fermi coordinates","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Andrea Geralico, Christian Cherubini, Donato Bini, Simonetta Filippi","submitted_at":"2014-08-19T10:08:05Z","abstract_excerpt":"We discuss geodesic motion in the vacuum C metric using Bondi-like spherical coordinates, with special attention to the role played by the \"equatorial plane.\" We show that the spatial trajectory of photons on such a hypersurface is formally the same of photons on the equatorial plane of the Schwarzschild spacetime, apart from an energy shift involving the spacetime acceleration parameter. Furthermore, we show that photons starting their motion from this hypersurface with vanishing component of the momentum along $\\theta$, remain confined on it, differently from the case of massive particles. T"},"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":"1408.4277","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2014-08-19T10:08:05Z","cross_cats_sorted":[],"title_canon_sha256":"caeaef8eaaf0169a1e476e3a28396cd58dfb371fbccaf1b3fd9fb3ee31f95816","abstract_canon_sha256":"7a2c2f872c8ea3573c4a773732194c6225da4a4a9a4bf9ee560d2f5439492bf3"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:42:17.500600Z","signature_b64":"UXb/B8JMRbqTJpBp/1O0Rgp/l7dH5VlY1ifioFea2N2/9i3qrbEYEwVHl9QmZpr5JUoY+kgwobT/4jkHH8vrBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"caf4584bb12a51bd25a55a8a86cca2311e35e27a7d3226fddddd878f727dd8a5","last_reissued_at":"2026-05-18T01:42:17.499915Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:42:17.499915Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"C metric: the equatorial plane and Fermi coordinates","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Andrea Geralico, Christian Cherubini, Donato Bini, Simonetta Filippi","submitted_at":"2014-08-19T10:08:05Z","abstract_excerpt":"We discuss geodesic motion in the vacuum C metric using Bondi-like spherical coordinates, with special attention to the role played by the \"equatorial plane.\" We show that the spatial trajectory of photons on such a hypersurface is formally the same of photons on the equatorial plane of the Schwarzschild spacetime, apart from an energy shift involving the spacetime acceleration parameter. Furthermore, we show that photons starting their motion from this hypersurface with vanishing component of the momentum along $\\theta$, remain confined on it, differently from the case of massive particles. T"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1408.4277","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":""},"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":"1408.4277","created_at":"2026-05-18T01:42:17.500018+00:00"},{"alias_kind":"arxiv_version","alias_value":"1408.4277v1","created_at":"2026-05-18T01:42:17.500018+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1408.4277","created_at":"2026-05-18T01:42:17.500018+00:00"},{"alias_kind":"pith_short_12","alias_value":"ZL2FQS5RFJI3","created_at":"2026-05-18T12:28:59.999130+00:00"},{"alias_kind":"pith_short_16","alias_value":"ZL2FQS5RFJI32JNF","created_at":"2026-05-18T12:28:59.999130+00:00"},{"alias_kind":"pith_short_8","alias_value":"ZL2FQS5R","created_at":"2026-05-18T12:28:59.999130+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/ZL2FQS5RFJI32JNFLKFINTFCGE","json":"https://pith.science/pith/ZL2FQS5RFJI32JNFLKFINTFCGE.json","graph_json":"https://pith.science/api/pith-number/ZL2FQS5RFJI32JNFLKFINTFCGE/graph.json","events_json":"https://pith.science/api/pith-number/ZL2FQS5RFJI32JNFLKFINTFCGE/events.json","paper":"https://pith.science/paper/ZL2FQS5R"},"agent_actions":{"view_html":"https://pith.science/pith/ZL2FQS5RFJI32JNFLKFINTFCGE","download_json":"https://pith.science/pith/ZL2FQS5RFJI32JNFLKFINTFCGE.json","view_paper":"https://pith.science/paper/ZL2FQS5R","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1408.4277&json=true","fetch_graph":"https://pith.science/api/pith-number/ZL2FQS5RFJI32JNFLKFINTFCGE/graph.json","fetch_events":"https://pith.science/api/pith-number/ZL2FQS5RFJI32JNFLKFINTFCGE/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ZL2FQS5RFJI32JNFLKFINTFCGE/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ZL2FQS5RFJI32JNFLKFINTFCGE/action/storage_attestation","attest_author":"https://pith.science/pith/ZL2FQS5RFJI32JNFLKFINTFCGE/action/author_attestation","sign_citation":"https://pith.science/pith/ZL2FQS5RFJI32JNFLKFINTFCGE/action/citation_signature","submit_replication":"https://pith.science/pith/ZL2FQS5RFJI32JNFLKFINTFCGE/action/replication_record"}},"created_at":"2026-05-18T01:42:17.500018+00:00","updated_at":"2026-05-18T01:42:17.500018+00:00"}