{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2016:DZCZFGIB55EKVYLP3HZ3EVWC4D","short_pith_number":"pith:DZCZFGIB","schema_version":"1.0","canonical_sha256":"1e45929901ef48aae16fd9f3b256c2e0f48fb35ec7f34e0b8343b23c12adce8d","source":{"kind":"arxiv","id":"1607.02417","version":2},"attestation_state":"computed","paper":{"title":"Unbiased contaminant removal for 3D galaxy power spectrum measurements","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Benedict Bahr-Kalus, David Bacon, Lado Samushia, Will J Percival","submitted_at":"2016-07-08T15:35:48Z","abstract_excerpt":"We assess and develop techniques to remove contaminants when calculating the 3D galaxy power spectrum. We separate the process into three separate stages: (i) removing the contaminant signal, (ii) estimating the uncontaminated cosmological power spectrum, (iii) debiasing the resulting estimates. For (i), we show that removing the best-fit contaminant mode subtraction), and setting the contaminated components of the covariance to be infinite (mode deprojection) are mathematically equivalent. For (ii), performing a Quadratic Maximum Likelihood (QML) estimate after mode deprojection gives an opti"},"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":"1607.02417","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-07-08T15:35:48Z","cross_cats_sorted":[],"title_canon_sha256":"467c26097dabf1c21e29b86239ac1287b947aff05c49e02055fd44f9e5b28bc8","abstract_canon_sha256":"bb638c706efd89e42445fbde9544a7d98a4c9b5171039a9c81db34ea2789f28d"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:18:59.729332Z","signature_b64":"K5+xiqYwKEI/Oc3oxZwwF6jIUQN92FjKRCGVq2t6GNJrp/TmG+7Z1FWnvvJIDzNi3dD5KHMM5A0otxMxr/reCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1e45929901ef48aae16fd9f3b256c2e0f48fb35ec7f34e0b8343b23c12adce8d","last_reissued_at":"2026-07-05T05:18:59.728893Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:18:59.728893Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Unbiased contaminant removal for 3D galaxy power spectrum measurements","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Benedict Bahr-Kalus, David Bacon, Lado Samushia, Will J Percival","submitted_at":"2016-07-08T15:35:48Z","abstract_excerpt":"We assess and develop techniques to remove contaminants when calculating the 3D galaxy power spectrum. We separate the process into three separate stages: (i) removing the contaminant signal, (ii) estimating the uncontaminated cosmological power spectrum, (iii) debiasing the resulting estimates. For (i), we show that removing the best-fit contaminant mode subtraction), and setting the contaminated components of the covariance to be infinite (mode deprojection) are mathematically equivalent. For (ii), performing a Quadratic Maximum Likelihood (QML) estimate after mode deprojection gives an opti"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.02417","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/1607.02417/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":"1607.02417","created_at":"2026-07-05T05:18:59.728956+00:00"},{"alias_kind":"arxiv_version","alias_value":"1607.02417v2","created_at":"2026-07-05T05:18:59.728956+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.02417","created_at":"2026-07-05T05:18:59.728956+00:00"},{"alias_kind":"pith_short_12","alias_value":"DZCZFGIB55EK","created_at":"2026-07-05T05:18:59.728956+00:00"},{"alias_kind":"pith_short_16","alias_value":"DZCZFGIB55EKVYLP","created_at":"2026-07-05T05:18:59.728956+00:00"},{"alias_kind":"pith_short_8","alias_value":"DZCZFGIB","created_at":"2026-07-05T05:18:59.728956+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/DZCZFGIB55EKVYLP3HZ3EVWC4D","json":"https://pith.science/pith/DZCZFGIB55EKVYLP3HZ3EVWC4D.json","graph_json":"https://pith.science/api/pith-number/DZCZFGIB55EKVYLP3HZ3EVWC4D/graph.json","events_json":"https://pith.science/api/pith-number/DZCZFGIB55EKVYLP3HZ3EVWC4D/events.json","paper":"https://pith.science/paper/DZCZFGIB"},"agent_actions":{"view_html":"https://pith.science/pith/DZCZFGIB55EKVYLP3HZ3EVWC4D","download_json":"https://pith.science/pith/DZCZFGIB55EKVYLP3HZ3EVWC4D.json","view_paper":"https://pith.science/paper/DZCZFGIB","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1607.02417&json=true","fetch_graph":"https://pith.science/api/pith-number/DZCZFGIB55EKVYLP3HZ3EVWC4D/graph.json","fetch_events":"https://pith.science/api/pith-number/DZCZFGIB55EKVYLP3HZ3EVWC4D/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/DZCZFGIB55EKVYLP3HZ3EVWC4D/action/timestamp_anchor","attest_storage":"https://pith.science/pith/DZCZFGIB55EKVYLP3HZ3EVWC4D/action/storage_attestation","attest_author":"https://pith.science/pith/DZCZFGIB55EKVYLP3HZ3EVWC4D/action/author_attestation","sign_citation":"https://pith.science/pith/DZCZFGIB55EKVYLP3HZ3EVWC4D/action/citation_signature","submit_replication":"https://pith.science/pith/DZCZFGIB55EKVYLP3HZ3EVWC4D/action/replication_record"}},"created_at":"2026-07-05T05:18:59.728956+00:00","updated_at":"2026-07-05T05:18:59.728956+00:00"}