{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:TQVJXKFTINDDO6MZBHR3MYSNCW","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"f358b4e3efc524ef836035dd85f26dee913cdf39062014a081fb357ac1a1f615","cross_cats_sorted":["hep-ex","stat.AP"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.data-an","submitted_at":"2018-07-20T16:01:39Z","title_canon_sha256":"bb73f13c0a4c964232df9ee11347cd4eafc4492048af44a6370a28cf3ee4a949"},"schema_version":"1.0","source":{"id":"1807.07911","kind":"arxiv","version":9}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.07911","created_at":"2026-05-17T23:44:02Z"},{"alias_kind":"arxiv_version","alias_value":"1807.07911v9","created_at":"2026-05-17T23:44:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.07911","created_at":"2026-05-17T23:44:02Z"},{"alias_kind":"pith_short_12","alias_value":"TQVJXKFTINDD","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_16","alias_value":"TQVJXKFTINDDO6MZ","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_8","alias_value":"TQVJXKFT","created_at":"2026-05-18T12:32:56Z"}],"graph_snapshots":[{"event_id":"sha256:7129326e0d3dc4fcf58e3b45338fb5b70097a7ec4ba8ec639c00285a81741dd5","target":"graph","created_at":"2026-05-17T23:44:02Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Least-squares fits are an important tool in many data analysis applications. In this paper, we review theoretical results, which are relevant for their application to data from counting experiments. Using a simple example, we illustrate the well known fact that commonly used variants of the least-squares fit applied to Poisson-distributed data produce biased estimates. The bias can be overcome with an iterated weighted least-squares method, which produces results identical to the maximum-likelihood method. For linear models, the iterated weighted least-squares method converges faster than the ","authors_text":"Hans Dembinski, Michael Schmelling, Roland Waldi","cross_cats":["hep-ex","stat.AP"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.data-an","submitted_at":"2018-07-20T16:01:39Z","title":"Application of the Iterated Weighted Least-Squares Fit to counting experiments"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.07911","kind":"arxiv","version":9},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:1c02e27e1db6ec3628f52726aed296e941b84a38477911b88ba4e50d2b146760","target":"record","created_at":"2026-05-17T23:44:02Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"f358b4e3efc524ef836035dd85f26dee913cdf39062014a081fb357ac1a1f615","cross_cats_sorted":["hep-ex","stat.AP"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.data-an","submitted_at":"2018-07-20T16:01:39Z","title_canon_sha256":"bb73f13c0a4c964232df9ee11347cd4eafc4492048af44a6370a28cf3ee4a949"},"schema_version":"1.0","source":{"id":"1807.07911","kind":"arxiv","version":9}},"canonical_sha256":"9c2a9ba8b3434637799909e3b6624d158098d807922383105f5dcc823d01ce99","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9c2a9ba8b3434637799909e3b6624d158098d807922383105f5dcc823d01ce99","first_computed_at":"2026-05-17T23:44:02.897328Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:44:02.897328Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4IANW38Oxr9y0JFYPVipQTyBYdH+Z8l9aq8xH3L3MO2Cp7vP1Vv+827Gw1k2uOR4o+A3oqCbdTcRlXjKBG62AQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:44:02.897765Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.07911","source_kind":"arxiv","source_version":9}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1c02e27e1db6ec3628f52726aed296e941b84a38477911b88ba4e50d2b146760","sha256:7129326e0d3dc4fcf58e3b45338fb5b70097a7ec4ba8ec639c00285a81741dd5"],"state_sha256":"db62582d3e0cc972a046b7146111d23394913c5d3cbfaff91ffd83b330aefa56"}