{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:2GESCK4FMCMSE7YC5DBUCCEUBB","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":"7f2cd44239a5b9dc23a4815324d3deddf6fdf8a50142d3950e32ee2bb5cda24b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-07-28T05:43:24Z","title_canon_sha256":"2870c5622e05f2873d9deeff30b7d00fe6080d53cbdb61510898f2e164e63380"},"schema_version":"1.0","source":{"id":"2007.13998","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.13998","created_at":"2026-07-05T01:42:40Z"},{"alias_kind":"arxiv_version","alias_value":"2007.13998v2","created_at":"2026-07-05T01:42:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.13998","created_at":"2026-07-05T01:42:40Z"},{"alias_kind":"pith_short_12","alias_value":"2GESCK4FMCMS","created_at":"2026-07-05T01:42:40Z"},{"alias_kind":"pith_short_16","alias_value":"2GESCK4FMCMSE7YC","created_at":"2026-07-05T01:42:40Z"},{"alias_kind":"pith_short_8","alias_value":"2GESCK4F","created_at":"2026-07-05T01:42:40Z"}],"graph_snapshots":[{"event_id":"sha256:44f5f0f7a99e30f7b6c630b1c1e9062276d4cefb452352f438bb447ea77d18af","target":"graph","created_at":"2026-07-05T01:42:40Z","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/2007.13998/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We explore the covariance of redshift-space matter power spectra after a standard density-field reconstruction. We derive perturbative formula of the covariance at the tree-level order and find that the amplitude of the off-diagonal components from the trispectrum decreases by reconstruction. Using a large set of N-body simulations, we also find the similar reduction of the off-diagonal components of the covariance and thereby the signal-to-noise ratio (S/N) of the post-reconstructed (post-rec) power spectra significantly increases compared to the pre-reconstructed spectra. This indicates that","authors_text":"Chiaki Hikage, Kazuya Koyama, Ryuichi Takahashi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-07-28T05:43:24Z","title":"Covariance of the redshift-space matter power spectrum after reconstruction"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.13998","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":"sha256:38d9fddd2d7fd52f9d637acada8dd9cf7777670aba67fd4a79a08150b57af916","target":"record","created_at":"2026-07-05T01:42:40Z","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":"7f2cd44239a5b9dc23a4815324d3deddf6fdf8a50142d3950e32ee2bb5cda24b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-07-28T05:43:24Z","title_canon_sha256":"2870c5622e05f2873d9deeff30b7d00fe6080d53cbdb61510898f2e164e63380"},"schema_version":"1.0","source":{"id":"2007.13998","kind":"arxiv","version":2}},"canonical_sha256":"d189212b856099227f02e8c3410894084509d5da8aca9c6308b548ceeb857215","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d189212b856099227f02e8c3410894084509d5da8aca9c6308b548ceeb857215","first_computed_at":"2026-07-05T01:42:40.669752Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:42:40.669752Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"736zeVoSCK0H7VVMVqvtw43mT182kn717EbNqqvpLIpqYhG93iY+H5AxIWfTushuM/BTBezThnROEjUKOiDzBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T01:42:40.670124Z","signed_message":"canonical_sha256_bytes"},"source_id":"2007.13998","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:38d9fddd2d7fd52f9d637acada8dd9cf7777670aba67fd4a79a08150b57af916","sha256:44f5f0f7a99e30f7b6c630b1c1e9062276d4cefb452352f438bb447ea77d18af"],"state_sha256":"a2e3e922134dd0e320357e44b6c7642be25b8526330c17c041110963fbd227b6"}