{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:PJ5CUZDG4SL5ULOANXB3A2RF5F","short_pith_number":"pith:PJ5CUZDG","schema_version":"1.0","canonical_sha256":"7a7a2a6466e497da2dc06dc3b06a25e97567be9e3961e6b1204ee1b5f5f7729b","source":{"kind":"arxiv","id":"1712.04923","version":1},"attestation_state":"computed","paper":{"title":"The skewed weak lensing likelihood: why biases arise, despite data and theory being sound","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Catherine Heymans, Elena Sellentin, Joachim Harnois-D\\'eraps","submitted_at":"2017-12-13T18:52:01Z","abstract_excerpt":"We derive the essentials of the skewed weak lensing likelihood via a simple Hierarchical Model. Our likelihood passes four objective and cosmology-independent tests which a standard Gaussian likelihood fails. We demonstrate that sound weak lensing analyses are naturally biased low, and this does not indicate any new physics such as deviations from $\\Lambda$CDM. Mathematically, the biases arise because noisy two-point functions follow skewed distributions. This form of bias is already known from CMB analyses, where the low multipoles have asymmetric error bars. Weak lensing is more strongly aff"},"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":"1712.04923","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-12-13T18:52:01Z","cross_cats_sorted":[],"title_canon_sha256":"4906e91dfb2cedc57248e5315f37b164537bb045efb02a1e7c070813f944b139","abstract_canon_sha256":"d112da6ea4a293636bcd421e3edf746a744e4a3960cc9b0fc1c8a5f47357b28e"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:17:08.239907Z","signature_b64":"8K/y3XlVjuVKPqMIAUyUFJLF7lcyVtAvV3zHAaH/Y9pyAWP8hXmLntcGFP7Qt+DzYW1o4n1GoKj3nVkFjpc+Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7a7a2a6466e497da2dc06dc3b06a25e97567be9e3961e6b1204ee1b5f5f7729b","last_reissued_at":"2026-05-18T00:17:08.239159Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:17:08.239159Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The skewed weak lensing likelihood: why biases arise, despite data and theory being sound","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Catherine Heymans, Elena Sellentin, Joachim Harnois-D\\'eraps","submitted_at":"2017-12-13T18:52:01Z","abstract_excerpt":"We derive the essentials of the skewed weak lensing likelihood via a simple Hierarchical Model. Our likelihood passes four objective and cosmology-independent tests which a standard Gaussian likelihood fails. We demonstrate that sound weak lensing analyses are naturally biased low, and this does not indicate any new physics such as deviations from $\\Lambda$CDM. Mathematically, the biases arise because noisy two-point functions follow skewed distributions. This form of bias is already known from CMB analyses, where the low multipoles have asymmetric error bars. Weak lensing is more strongly aff"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1712.04923","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":"1712.04923","created_at":"2026-05-18T00:17:08.239293+00:00"},{"alias_kind":"arxiv_version","alias_value":"1712.04923v1","created_at":"2026-05-18T00:17:08.239293+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1712.04923","created_at":"2026-05-18T00:17:08.239293+00:00"},{"alias_kind":"pith_short_12","alias_value":"PJ5CUZDG4SL5","created_at":"2026-05-18T12:31:37.085036+00:00"},{"alias_kind":"pith_short_16","alias_value":"PJ5CUZDG4SL5ULOA","created_at":"2026-05-18T12:31:37.085036+00:00"},{"alias_kind":"pith_short_8","alias_value":"PJ5CUZDG","created_at":"2026-05-18T12:31:37.085036+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/PJ5CUZDG4SL5ULOANXB3A2RF5F","json":"https://pith.science/pith/PJ5CUZDG4SL5ULOANXB3A2RF5F.json","graph_json":"https://pith.science/api/pith-number/PJ5CUZDG4SL5ULOANXB3A2RF5F/graph.json","events_json":"https://pith.science/api/pith-number/PJ5CUZDG4SL5ULOANXB3A2RF5F/events.json","paper":"https://pith.science/paper/PJ5CUZDG"},"agent_actions":{"view_html":"https://pith.science/pith/PJ5CUZDG4SL5ULOANXB3A2RF5F","download_json":"https://pith.science/pith/PJ5CUZDG4SL5ULOANXB3A2RF5F.json","view_paper":"https://pith.science/paper/PJ5CUZDG","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1712.04923&json=true","fetch_graph":"https://pith.science/api/pith-number/PJ5CUZDG4SL5ULOANXB3A2RF5F/graph.json","fetch_events":"https://pith.science/api/pith-number/PJ5CUZDG4SL5ULOANXB3A2RF5F/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/PJ5CUZDG4SL5ULOANXB3A2RF5F/action/timestamp_anchor","attest_storage":"https://pith.science/pith/PJ5CUZDG4SL5ULOANXB3A2RF5F/action/storage_attestation","attest_author":"https://pith.science/pith/PJ5CUZDG4SL5ULOANXB3A2RF5F/action/author_attestation","sign_citation":"https://pith.science/pith/PJ5CUZDG4SL5ULOANXB3A2RF5F/action/citation_signature","submit_replication":"https://pith.science/pith/PJ5CUZDG4SL5ULOANXB3A2RF5F/action/replication_record"}},"created_at":"2026-05-18T00:17:08.239293+00:00","updated_at":"2026-05-18T00:17:08.239293+00:00"}