{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:DZCZFGIB55EKVYLP3HZ3EVWC4D","short_pith_number":"pith:DZCZFGIB","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"},"canonical_sha256":"1e45929901ef48aae16fd9f3b256c2e0f48fb35ec7f34e0b8343b23c12adce8d","source":{"kind":"arxiv","id":"1607.02417","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.02417","created_at":"2026-07-05T05:18:59Z"},{"alias_kind":"arxiv_version","alias_value":"1607.02417v2","created_at":"2026-07-05T05:18:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.02417","created_at":"2026-07-05T05:18:59Z"},{"alias_kind":"pith_short_12","alias_value":"DZCZFGIB55EK","created_at":"2026-07-05T05:18:59Z"},{"alias_kind":"pith_short_16","alias_value":"DZCZFGIB55EKVYLP","created_at":"2026-07-05T05:18:59Z"},{"alias_kind":"pith_short_8","alias_value":"DZCZFGIB","created_at":"2026-07-05T05:18:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:DZCZFGIB55EKVYLP3HZ3EVWC4D","target":"record","payload":{"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"},"canonical_sha256":"1e45929901ef48aae16fd9f3b256c2e0f48fb35ec7f34e0b8343b23c12adce8d","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"},"source_kind":"arxiv","source_id":"1607.02417","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T05:18:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FC8wxGuO1vbB7btDRT8BlmoH1KCYgSM3Ig9cwu5AHStCYcaSg7LCZOY48qgU8dSD0t94RFaSpB3Ss76S7SI8CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T03:56:48.854626Z"},"content_sha256":"236f7e08bb483fb2bf5f70c1126f416214b42144ae3a62034817a016ca5dfc7d","schema_version":"1.0","event_id":"sha256:236f7e08bb483fb2bf5f70c1126f416214b42144ae3a62034817a016ca5dfc7d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:DZCZFGIB55EKVYLP3HZ3EVWC4D","target":"graph","payload":{"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T05:18:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Vi3yD2tYuGkc2AIsZkuXnvdzyBttVWgtDaVvbLGUzGe2NEJbm4h+V3sk+Dtd7errMz9gFEpLVaHx2osDFgcWAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T03:56:48.855006Z"},"content_sha256":"c1d70d18057d7383c15838a5bc0c0a31e49ae0cb2fe3965889a025f19825a168","schema_version":"1.0","event_id":"sha256:c1d70d18057d7383c15838a5bc0c0a31e49ae0cb2fe3965889a025f19825a168"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DZCZFGIB55EKVYLP3HZ3EVWC4D/bundle.json","state_url":"https://pith.science/pith/DZCZFGIB55EKVYLP3HZ3EVWC4D/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DZCZFGIB55EKVYLP3HZ3EVWC4D/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-04T03:56:48Z","links":{"resolver":"https://pith.science/pith/DZCZFGIB55EKVYLP3HZ3EVWC4D","bundle":"https://pith.science/pith/DZCZFGIB55EKVYLP3HZ3EVWC4D/bundle.json","state":"https://pith.science/pith/DZCZFGIB55EKVYLP3HZ3EVWC4D/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DZCZFGIB55EKVYLP3HZ3EVWC4D/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:DZCZFGIB55EKVYLP3HZ3EVWC4D","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":"bb638c706efd89e42445fbde9544a7d98a4c9b5171039a9c81db34ea2789f28d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-07-08T15:35:48Z","title_canon_sha256":"467c26097dabf1c21e29b86239ac1287b947aff05c49e02055fd44f9e5b28bc8"},"schema_version":"1.0","source":{"id":"1607.02417","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.02417","created_at":"2026-07-05T05:18:59Z"},{"alias_kind":"arxiv_version","alias_value":"1607.02417v2","created_at":"2026-07-05T05:18:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.02417","created_at":"2026-07-05T05:18:59Z"},{"alias_kind":"pith_short_12","alias_value":"DZCZFGIB55EK","created_at":"2026-07-05T05:18:59Z"},{"alias_kind":"pith_short_16","alias_value":"DZCZFGIB55EKVYLP","created_at":"2026-07-05T05:18:59Z"},{"alias_kind":"pith_short_8","alias_value":"DZCZFGIB","created_at":"2026-07-05T05:18:59Z"}],"graph_snapshots":[{"event_id":"sha256:c1d70d18057d7383c15838a5bc0c0a31e49ae0cb2fe3965889a025f19825a168","target":"graph","created_at":"2026-07-05T05:18:59Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1607.02417/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"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","authors_text":"Benedict Bahr-Kalus, David Bacon, Lado Samushia, Will J Percival","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-07-08T15:35:48Z","title":"Unbiased contaminant removal for 3D galaxy power spectrum measurements"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.02417","kind":"arxiv","version":2},"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":"sha256:236f7e08bb483fb2bf5f70c1126f416214b42144ae3a62034817a016ca5dfc7d","target":"record","created_at":"2026-07-05T05:18:59Z","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":"bb638c706efd89e42445fbde9544a7d98a4c9b5171039a9c81db34ea2789f28d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-07-08T15:35:48Z","title_canon_sha256":"467c26097dabf1c21e29b86239ac1287b947aff05c49e02055fd44f9e5b28bc8"},"schema_version":"1.0","source":{"id":"1607.02417","kind":"arxiv","version":2}},"canonical_sha256":"1e45929901ef48aae16fd9f3b256c2e0f48fb35ec7f34e0b8343b23c12adce8d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1e45929901ef48aae16fd9f3b256c2e0f48fb35ec7f34e0b8343b23c12adce8d","first_computed_at":"2026-07-05T05:18:59.728893Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:18:59.728893Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"K5+xiqYwKEI/Oc3oxZwwF6jIUQN92FjKRCGVq2t6GNJrp/TmG+7Z1FWnvvJIDzNi3dD5KHMM5A0otxMxr/reCA==","signature_status":"signed_v1","signed_at":"2026-07-05T05:18:59.729332Z","signed_message":"canonical_sha256_bytes"},"source_id":"1607.02417","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:236f7e08bb483fb2bf5f70c1126f416214b42144ae3a62034817a016ca5dfc7d","sha256:c1d70d18057d7383c15838a5bc0c0a31e49ae0cb2fe3965889a025f19825a168"],"state_sha256":"58e17e7c36ba33ceb4e6c5b5f9a3ea810c407b368363dc0e5782c5f25910b230"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DoOe7WD1nPtfblnvPilDjSdb6S7oe1lc1Ea7XD3iV2Cc+itAKmIJv0N2haqlCiid+CL2+fEM/BQ+VOt1c/N9Dg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T03:56:48.857350Z","bundle_sha256":"99ca9befa34bed7b420531fc2ccad9f2c098985201688723f175226bd4014dea"}}