{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:QTI7FVWMW5ZQEGGE2UXLNLTYWL","short_pith_number":"pith:QTI7FVWM","canonical_record":{"source":{"id":"1909.00791","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-09-02T16:38:14Z","cross_cats_sorted":[],"title_canon_sha256":"5642f1ac1129084e01830fe720cc30784459387de5a03e112b99e5dda8c63bb0","abstract_canon_sha256":"4622c88f8235efa9f3fbfca823eb3c64b088ec87b40edc76f3993eb33143523a"},"schema_version":"1.0"},"canonical_sha256":"84d1f2d6ccb7730218c4d52eb6ae78b2dc4351f15837cdb552030b3284677ce4","source":{"kind":"arxiv","id":"1909.00791","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1909.00791","created_at":"2026-07-05T00:39:57Z"},{"alias_kind":"arxiv_version","alias_value":"1909.00791v2","created_at":"2026-07-05T00:39:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1909.00791","created_at":"2026-07-05T00:39:57Z"},{"alias_kind":"pith_short_12","alias_value":"QTI7FVWMW5ZQ","created_at":"2026-07-05T00:39:57Z"},{"alias_kind":"pith_short_16","alias_value":"QTI7FVWMW5ZQEGGE","created_at":"2026-07-05T00:39:57Z"},{"alias_kind":"pith_short_8","alias_value":"QTI7FVWM","created_at":"2026-07-05T00:39:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:QTI7FVWMW5ZQEGGE2UXLNLTYWL","target":"record","payload":{"canonical_record":{"source":{"id":"1909.00791","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-09-02T16:38:14Z","cross_cats_sorted":[],"title_canon_sha256":"5642f1ac1129084e01830fe720cc30784459387de5a03e112b99e5dda8c63bb0","abstract_canon_sha256":"4622c88f8235efa9f3fbfca823eb3c64b088ec87b40edc76f3993eb33143523a"},"schema_version":"1.0"},"canonical_sha256":"84d1f2d6ccb7730218c4d52eb6ae78b2dc4351f15837cdb552030b3284677ce4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:39:57.216450Z","signature_b64":"67uaanXpOc6KMI6r79pb1Uy/AZwx+VepyO9kF2M2z1pz5z4vLk+iudNUOIELXvVHdQPoEZMwN7Yb4tt8pdq9Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"84d1f2d6ccb7730218c4d52eb6ae78b2dc4351f15837cdb552030b3284677ce4","last_reissued_at":"2026-07-05T00:39:57.215988Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:39:57.215988Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1909.00791","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":"2026-07-05T00:39:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FTkz4ulW1/nfu11bV+1oAqfUiWFCftSRF06+ij36ZobgJrfi3q5mYhM/R1q1AHSpuoi56f8XZy9KSy7U5/5KDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T05:36:46.728774Z"},"content_sha256":"2469c40490e90f315a403bc1e345784d5133b57bd84b94a3169b68304f30d3fe","schema_version":"1.0","event_id":"sha256:2469c40490e90f315a403bc1e345784d5133b57bd84b94a3169b68304f30d3fe"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:QTI7FVWMW5ZQEGGE2UXLNLTYWL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The impact of braiding covariance and in-survey covariance on next-generation galaxy surveys","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Fabien Lacasa","submitted_at":"2019-09-02T16:38:14Z","abstract_excerpt":"As galaxy surveys become more precise and push to smaller scales, the need for accurate covariances beyond the classical Gaussian formula becomes more acute. Here, I investigate the analytical implementation and impact of non-Gaussian covariance terms that I previously derived for galaxy clustering. Braiding covariance is such a class of terms and it gets contribution both from in-survey and super-survey modes. I present an approximation for braiding covariance which speeds up the numerical computation. I show that including braiding covariance is a necessary condition for including other non-"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1909.00791","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/1909.00791/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":"2026-07-05T00:39:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"c3UYVoEjnIVNg5tKxeWgkS/4DYTL5oOMMHD9ZhRtSPctSCqfC1vPLenotyrgr4g648zXiwc/AZhZp7iEAj97AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T05:36:46.729310Z"},"content_sha256":"a18d26ec3b00de9ccf9f8d9043bbfcc59bcfee89a50dffaa4f06f6b660343945","schema_version":"1.0","event_id":"sha256:a18d26ec3b00de9ccf9f8d9043bbfcc59bcfee89a50dffaa4f06f6b660343945"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QTI7FVWMW5ZQEGGE2UXLNLTYWL/bundle.json","state_url":"https://pith.science/pith/QTI7FVWMW5ZQEGGE2UXLNLTYWL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QTI7FVWMW5ZQEGGE2UXLNLTYWL/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":"2026-08-21T05:36:46Z","links":{"resolver":"https://pith.science/pith/QTI7FVWMW5ZQEGGE2UXLNLTYWL","bundle":"https://pith.science/pith/QTI7FVWMW5ZQEGGE2UXLNLTYWL/bundle.json","state":"https://pith.science/pith/QTI7FVWMW5ZQEGGE2UXLNLTYWL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QTI7FVWMW5ZQEGGE2UXLNLTYWL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:QTI7FVWMW5ZQEGGE2UXLNLTYWL","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":"4622c88f8235efa9f3fbfca823eb3c64b088ec87b40edc76f3993eb33143523a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-09-02T16:38:14Z","title_canon_sha256":"5642f1ac1129084e01830fe720cc30784459387de5a03e112b99e5dda8c63bb0"},"schema_version":"1.0","source":{"id":"1909.00791","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1909.00791","created_at":"2026-07-05T00:39:57Z"},{"alias_kind":"arxiv_version","alias_value":"1909.00791v2","created_at":"2026-07-05T00:39:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1909.00791","created_at":"2026-07-05T00:39:57Z"},{"alias_kind":"pith_short_12","alias_value":"QTI7FVWMW5ZQ","created_at":"2026-07-05T00:39:57Z"},{"alias_kind":"pith_short_16","alias_value":"QTI7FVWMW5ZQEGGE","created_at":"2026-07-05T00:39:57Z"},{"alias_kind":"pith_short_8","alias_value":"QTI7FVWM","created_at":"2026-07-05T00:39:57Z"}],"graph_snapshots":[{"event_id":"sha256:a18d26ec3b00de9ccf9f8d9043bbfcc59bcfee89a50dffaa4f06f6b660343945","target":"graph","created_at":"2026-07-05T00:39:57Z","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/1909.00791/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"As galaxy surveys become more precise and push to smaller scales, the need for accurate covariances beyond the classical Gaussian formula becomes more acute. Here, I investigate the analytical implementation and impact of non-Gaussian covariance terms that I previously derived for galaxy clustering. Braiding covariance is such a class of terms and it gets contribution both from in-survey and super-survey modes. I present an approximation for braiding covariance which speeds up the numerical computation. I show that including braiding covariance is a necessary condition for including other non-","authors_text":"Fabien Lacasa","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-09-02T16:38:14Z","title":"The impact of braiding covariance and in-survey covariance on next-generation galaxy surveys"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1909.00791","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":"sha256:2469c40490e90f315a403bc1e345784d5133b57bd84b94a3169b68304f30d3fe","target":"record","created_at":"2026-07-05T00:39:57Z","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":"4622c88f8235efa9f3fbfca823eb3c64b088ec87b40edc76f3993eb33143523a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-09-02T16:38:14Z","title_canon_sha256":"5642f1ac1129084e01830fe720cc30784459387de5a03e112b99e5dda8c63bb0"},"schema_version":"1.0","source":{"id":"1909.00791","kind":"arxiv","version":2}},"canonical_sha256":"84d1f2d6ccb7730218c4d52eb6ae78b2dc4351f15837cdb552030b3284677ce4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"84d1f2d6ccb7730218c4d52eb6ae78b2dc4351f15837cdb552030b3284677ce4","first_computed_at":"2026-07-05T00:39:57.215988Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:39:57.215988Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"67uaanXpOc6KMI6r79pb1Uy/AZwx+VepyO9kF2M2z1pz5z4vLk+iudNUOIELXvVHdQPoEZMwN7Yb4tt8pdq9Bg==","signature_status":"signed_v1","signed_at":"2026-07-05T00:39:57.216450Z","signed_message":"canonical_sha256_bytes"},"source_id":"1909.00791","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2469c40490e90f315a403bc1e345784d5133b57bd84b94a3169b68304f30d3fe","sha256:a18d26ec3b00de9ccf9f8d9043bbfcc59bcfee89a50dffaa4f06f6b660343945"],"state_sha256":"a9168265c236b14f62f826dcd749b0515d5da53f93e67ba16721eee0c4473392"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5SNLAuIqfYEDgYmupslBkWZfSQh1iZS/IR3PEtajLC8wayhHLCl3/tcEdzpRswChgW3GOKv8bCP7dotpaP+lAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-21T05:36:46.733938Z","bundle_sha256":"32b01fddd71b995e6a7b3c8741e133c4a5fa9f907663b09b4bf060ee0d6db337"}}