{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2016:GXL2OB77DXIZEBMZR2SBP2DDKV","short_pith_number":"pith:GXL2OB77","schema_version":"1.0","canonical_sha256":"35d7a707ff1dd19205998ea417e863557a23b6e80d529f2fb35ffe34461fd63f","source":{"kind":"arxiv","id":"1612.03045","version":1},"attestation_state":"computed","paper":{"title":"The conventions for the polarization angle","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Sperello di Serego Alighieri","submitted_at":"2016-11-30T11:49:12Z","abstract_excerpt":"Since more than a century astronomers measure the position angle of the major axis of the polarization ellipse starting from the North direction and increasing counter-clockwise, when looking at the source. This convention has been enforced by the IAU with a Resolution in 1973. Much later the WMAP satellite, which has observed the polarization of the cosmic microwave background, has unfortunately adopted the opposite convention: the polarization position angle is measured starting from the South and increasing clockwise, when looking at the source. This opposite convention has been followed by"},"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":"1612.03045","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-11-30T11:49:12Z","cross_cats_sorted":[],"title_canon_sha256":"762165de1b4b58528f6f020588dc5cc0c5095b46777d7752187f47e6b220ffec","abstract_canon_sha256":"369f241f81ab76a6d394dcbb36db21b92f07cbf0c3a8c3cf741433ff661af02d"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:54:26.071899Z","signature_b64":"1+NnWhLTqnZegYMweVmnysQmHVBS9DrQuyEdVmfpder/6bL85wwWIvOLtTF2OWSw7VRgBhvJf2c+lSXQhK9OBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"35d7a707ff1dd19205998ea417e863557a23b6e80d529f2fb35ffe34461fd63f","last_reissued_at":"2026-05-18T00:54:26.071325Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:54:26.071325Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The conventions for the polarization angle","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Sperello di Serego Alighieri","submitted_at":"2016-11-30T11:49:12Z","abstract_excerpt":"Since more than a century astronomers measure the position angle of the major axis of the polarization ellipse starting from the North direction and increasing counter-clockwise, when looking at the source. This convention has been enforced by the IAU with a Resolution in 1973. Much later the WMAP satellite, which has observed the polarization of the cosmic microwave background, has unfortunately adopted the opposite convention: the polarization position angle is measured starting from the South and increasing clockwise, when looking at the source. This opposite convention has been followed by"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.03045","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":"1612.03045","created_at":"2026-05-18T00:54:26.071419+00:00"},{"alias_kind":"arxiv_version","alias_value":"1612.03045v1","created_at":"2026-05-18T00:54:26.071419+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.03045","created_at":"2026-05-18T00:54:26.071419+00:00"},{"alias_kind":"pith_short_12","alias_value":"GXL2OB77DXIZ","created_at":"2026-05-18T12:30:19.053100+00:00"},{"alias_kind":"pith_short_16","alias_value":"GXL2OB77DXIZEBMZ","created_at":"2026-05-18T12:30:19.053100+00:00"},{"alias_kind":"pith_short_8","alias_value":"GXL2OB77","created_at":"2026-05-18T12:30:19.053100+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/GXL2OB77DXIZEBMZR2SBP2DDKV","json":"https://pith.science/pith/GXL2OB77DXIZEBMZR2SBP2DDKV.json","graph_json":"https://pith.science/api/pith-number/GXL2OB77DXIZEBMZR2SBP2DDKV/graph.json","events_json":"https://pith.science/api/pith-number/GXL2OB77DXIZEBMZR2SBP2DDKV/events.json","paper":"https://pith.science/paper/GXL2OB77"},"agent_actions":{"view_html":"https://pith.science/pith/GXL2OB77DXIZEBMZR2SBP2DDKV","download_json":"https://pith.science/pith/GXL2OB77DXIZEBMZR2SBP2DDKV.json","view_paper":"https://pith.science/paper/GXL2OB77","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1612.03045&json=true","fetch_graph":"https://pith.science/api/pith-number/GXL2OB77DXIZEBMZR2SBP2DDKV/graph.json","fetch_events":"https://pith.science/api/pith-number/GXL2OB77DXIZEBMZR2SBP2DDKV/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/GXL2OB77DXIZEBMZR2SBP2DDKV/action/timestamp_anchor","attest_storage":"https://pith.science/pith/GXL2OB77DXIZEBMZR2SBP2DDKV/action/storage_attestation","attest_author":"https://pith.science/pith/GXL2OB77DXIZEBMZR2SBP2DDKV/action/author_attestation","sign_citation":"https://pith.science/pith/GXL2OB77DXIZEBMZR2SBP2DDKV/action/citation_signature","submit_replication":"https://pith.science/pith/GXL2OB77DXIZEBMZR2SBP2DDKV/action/replication_record"}},"created_at":"2026-05-18T00:54:26.071419+00:00","updated_at":"2026-05-18T00:54:26.071419+00:00"}