{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2023:5VSD56Y53M6OB3HJWJY7TERDSL","short_pith_number":"pith:5VSD56Y5","schema_version":"1.0","canonical_sha256":"ed643efb1ddb3ce0ece9b271f9922392c41460e7202ffa5d2743972952c83ee0","source":{"kind":"arxiv","id":"2301.08205","version":2},"attestation_state":"computed","paper":{"title":"Circular Polarization of the Astrophysical Gravitational Wave Background","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"astro-ph.CO","authors_text":"Angelo Ricciardone, Atsushi Nishizawa, Lorenzo Valbusa Dall'Armi, Sabino Matarrese","submitted_at":"2023-01-19T17:56:26Z","abstract_excerpt":"The circular polarization of gravitational waves is a powerful observable to test parity violation in gravity and to distinguish between the primordial or the astrophysical origin of the stochastic background. This property comes from the expected unpolarized nature of the homogeneous and isotropic astrophysical background, contrary to some specific cosmological sources that can produce a polarized background. However, in this work we show that there is a non-negligible amount of circular polarization also in the astrophysical background, generated by Poisson fluctuations in the number of unre"},"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":"2301.08205","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2023-01-19T17:56:26Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"7cdccaf92f399ffb3f2c8030751715a3b58ae10a86b136d0b5578aef024b6ffc","abstract_canon_sha256":"6ca27b13d9ab93f7bec2fd28e9c177083dd651567c56fff969c2205d346fb25d"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:36:27.977357Z","signature_b64":"xTzQyJItla7ofcRxbmoEmHrMJkLFydJlq5PUVvRM3ZTCU45oQ4yPB+gj5dRCB+e+lJECFyomNtPyFfqG9ABfBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ed643efb1ddb3ce0ece9b271f9922392c41460e7202ffa5d2743972952c83ee0","last_reissued_at":"2026-07-05T06:36:27.976724Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:36:27.976724Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Circular Polarization of the Astrophysical Gravitational Wave Background","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"astro-ph.CO","authors_text":"Angelo Ricciardone, Atsushi Nishizawa, Lorenzo Valbusa Dall'Armi, Sabino Matarrese","submitted_at":"2023-01-19T17:56:26Z","abstract_excerpt":"The circular polarization of gravitational waves is a powerful observable to test parity violation in gravity and to distinguish between the primordial or the astrophysical origin of the stochastic background. This property comes from the expected unpolarized nature of the homogeneous and isotropic astrophysical background, contrary to some specific cosmological sources that can produce a polarized background. However, in this work we show that there is a non-negligible amount of circular polarization also in the astrophysical background, generated by Poisson fluctuations in the number of unre"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2301.08205","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2301.08205/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2301.08205","created_at":"2026-07-05T06:36:27.976792+00:00"},{"alias_kind":"arxiv_version","alias_value":"2301.08205v2","created_at":"2026-07-05T06:36:27.976792+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2301.08205","created_at":"2026-07-05T06:36:27.976792+00:00"},{"alias_kind":"pith_short_12","alias_value":"5VSD56Y53M6O","created_at":"2026-07-05T06:36:27.976792+00:00"},{"alias_kind":"pith_short_16","alias_value":"5VSD56Y53M6OB3HJ","created_at":"2026-07-05T06:36:27.976792+00:00"},{"alias_kind":"pith_short_8","alias_value":"5VSD56Y5","created_at":"2026-07-05T06:36:27.976792+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":4,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2605.25772","citing_title":"Polarized Anisotropic Stochastic Gravitational Wave Background Search with Ground-Based Detector Networks","ref_index":50,"is_internal_anchor":false},{"citing_arxiv_id":"2505.18085","citing_title":"First astrometric constraints on parity-violation in the gravitational wave background","ref_index":16,"is_internal_anchor":false},{"citing_arxiv_id":"2511.07956","citing_title":"Detecting Parity-Violating Gravitational Wave Backgrounds with Pulsar Polarization Arrays","ref_index":42,"is_internal_anchor":false},{"citing_arxiv_id":"2604.08141","citing_title":"Detecting Chiral Gravitational Wave Background with a Dipole Pulsar Timing Array","ref_index":33,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/5VSD56Y53M6OB3HJWJY7TERDSL","json":"https://pith.science/pith/5VSD56Y53M6OB3HJWJY7TERDSL.json","graph_json":"https://pith.science/api/pith-number/5VSD56Y53M6OB3HJWJY7TERDSL/graph.json","events_json":"https://pith.science/api/pith-number/5VSD56Y53M6OB3HJWJY7TERDSL/events.json","paper":"https://pith.science/paper/5VSD56Y5"},"agent_actions":{"view_html":"https://pith.science/pith/5VSD56Y53M6OB3HJWJY7TERDSL","download_json":"https://pith.science/pith/5VSD56Y53M6OB3HJWJY7TERDSL.json","view_paper":"https://pith.science/paper/5VSD56Y5","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2301.08205&json=true","fetch_graph":"https://pith.science/api/pith-number/5VSD56Y53M6OB3HJWJY7TERDSL/graph.json","fetch_events":"https://pith.science/api/pith-number/5VSD56Y53M6OB3HJWJY7TERDSL/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/5VSD56Y53M6OB3HJWJY7TERDSL/action/timestamp_anchor","attest_storage":"https://pith.science/pith/5VSD56Y53M6OB3HJWJY7TERDSL/action/storage_attestation","attest_author":"https://pith.science/pith/5VSD56Y53M6OB3HJWJY7TERDSL/action/author_attestation","sign_citation":"https://pith.science/pith/5VSD56Y53M6OB3HJWJY7TERDSL/action/citation_signature","submit_replication":"https://pith.science/pith/5VSD56Y53M6OB3HJWJY7TERDSL/action/replication_record"}},"created_at":"2026-07-05T06:36:27.976792+00:00","updated_at":"2026-07-05T06:36:27.976792+00:00"}