{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:EQREVKWBOK5DO3B5DISE4STGFB","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":"62a95043590d35d6055bab1aba0ecead260ffe1119d601d60161fea50efa45f0","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2025-12-17T17:12:43Z","title_canon_sha256":"38009b05cc4355b02fd04394f8db35d52ad6ff4c06b259ce593e36cac2074ba2"},"schema_version":"1.0","source":{"id":"2512.15604","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2512.15604","created_at":"2026-06-10T01:09:50Z"},{"alias_kind":"arxiv_version","alias_value":"2512.15604v2","created_at":"2026-06-10T01:09:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2512.15604","created_at":"2026-06-10T01:09:50Z"},{"alias_kind":"pith_short_12","alias_value":"EQREVKWBOK5D","created_at":"2026-06-10T01:09:50Z"},{"alias_kind":"pith_short_16","alias_value":"EQREVKWBOK5DO3B5","created_at":"2026-06-10T01:09:50Z"},{"alias_kind":"pith_short_8","alias_value":"EQREVKWB","created_at":"2026-06-10T01:09:50Z"}],"graph_snapshots":[{"event_id":"sha256:141fbc3eae915ff49ec73f25615f055e83d55e55b3640701ace02541fae8498a","target":"graph","created_at":"2026-06-10T01:09:50Z","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":4,"items":[{"attestation":"unclaimed","claim_id":"C1","kind":"strongest_claim","source":"verdict.strongest_claim","status":"machine_extracted","text":"We find that the nulling techniques considered can have a large impact on reducing the bias on S8 and Dark Energy parameters."},{"attestation":"unclaimed","claim_id":"C2","kind":"weakest_assumption","source":"verdict.weakest_assumption","status":"machine_extracted","text":"The Fisher forecast model accurately represents the bias reduction from nulling without needing full end-to-end simulations or real data validation, and the assumed baryon feedback model matches reality."},{"attestation":"unclaimed","claim_id":"C3","kind":"one_line_summary","source":"verdict.one_line_summary","status":"machine_extracted","text":"BNT, LUnul, and cross-correlation nulling methods reduce bias on S8 and dark energy parameters in cosmic shear Fisher forecasts, with LUnul most aggressive but at cost of precision."},{"attestation":"unclaimed","claim_id":"C4","kind":"headline","source":"verdict.pith_extraction.headline","status":"machine_extracted","text":"Nulling strategies can substantially reduce bias on S8 and dark energy parameters in cosmic shear measurements."}],"snapshot_sha256":"c4c18ff05c8c003333afa6fb215d1e1a5fb1bb675f288dcf00c7bb383d545435"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2512.15604/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present an analysis comparing nulling strategies for reducing the impact of baryon feedback on cosmic shear measurements. We consider three different approaches which aim to `null' the high-$k$ modes using transformations applied to the data vector: the Bernardeau-Nishimichi-Taruya (BNT) transform which operates on the lensing field, a new implementation of an LU factorisation of the discretized Limber integral (LUnul) which operates on the lensing two-point statistics, and finally a method which uses a correlated LSS tracers to suppress contributions from lower redshifts (cross-correlation","authors_text":"Alex Hall, Naomi Clare Robertson","cross_cats":[],"headline":"Nulling strategies can substantially reduce bias on S8 and dark energy parameters in cosmic shear measurements.","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2025-12-17T17:12:43Z","title":"Comparing cosmic shear nulling methods for Stage-IV surveys"},"references":{"count":1,"internal_anchors":0,"resolved_work":1,"sample":[{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":1,"title":"arXiv:2404.06098","work_id":"f0473644-ad99-4edb-9f42-c63ec2f0c1e4","year":2022}],"snapshot_sha256":"daaaddaca948973c227002adbb743ce851825b7225b9f87c04866c3326293d99"},"source":{"id":"2512.15604","kind":"arxiv","version":2},"verdict":{"created_at":"2026-05-16T21:20:01.975605Z","id":"286532e2-0b78-47b5-b658-8f7366800fc1","model_set":{"reader":"grok-4.3"},"one_line_summary":"BNT, LUnul, and cross-correlation nulling methods reduce bias on S8 and dark energy parameters in cosmic shear Fisher forecasts, with LUnul most aggressive but at cost of precision.","pipeline_version":"pith-pipeline@v0.9.0","pith_extraction_headline":"Nulling strategies can substantially reduce bias on S8 and dark energy parameters in cosmic shear measurements.","strongest_claim":"We find that the nulling techniques considered can have a large impact on reducing the bias on S8 and Dark Energy parameters.","weakest_assumption":"The Fisher forecast model accurately represents the bias reduction from nulling without needing full end-to-end simulations or real data validation, and the assumed baryon feedback model matches reality."}},"verdict_id":"286532e2-0b78-47b5-b658-8f7366800fc1"}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:986eb87fb208064a0a22dbddeb5d4b8c7832cfec77a0e43bc0ca32db9a85c04b","target":"record","created_at":"2026-06-10T01:09:50Z","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":"62a95043590d35d6055bab1aba0ecead260ffe1119d601d60161fea50efa45f0","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2025-12-17T17:12:43Z","title_canon_sha256":"38009b05cc4355b02fd04394f8db35d52ad6ff4c06b259ce593e36cac2074ba2"},"schema_version":"1.0","source":{"id":"2512.15604","kind":"arxiv","version":2}},"canonical_sha256":"24224aaac172ba376c3d1a244e4a66284bf559219194bddec559458e18342ba9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"24224aaac172ba376c3d1a244e4a66284bf559219194bddec559458e18342ba9","first_computed_at":"2026-06-10T01:09:50.612753Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-10T01:09:50.612753Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2Ykpd658EZqURGUgVYNMWOdMDYJTkKXEpAYSGbqXhJGZWddO638nMW9cMIriuWfFNyhiehIttpsoybUbJaQ6Cw==","signature_status":"signed_v1","signed_at":"2026-06-10T01:09:50.613737Z","signed_message":"canonical_sha256_bytes"},"source_id":"2512.15604","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:986eb87fb208064a0a22dbddeb5d4b8c7832cfec77a0e43bc0ca32db9a85c04b","sha256:141fbc3eae915ff49ec73f25615f055e83d55e55b3640701ace02541fae8498a"],"state_sha256":"9b9efc0ec988d602455bf03a0b9965320014ffc174788ce3cdcde8c49e2a4a6d"}