{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1998:7YNW3ZDQQI6LFGKLDSYHLHWNNA","short_pith_number":"pith:7YNW3ZDQ","canonical_record":{"source":{"id":"astro-ph/9808305","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1998-08-26T21:35:31Z","cross_cats_sorted":[],"title_canon_sha256":"309bfd365fc60c6349e7c95901473d6ebec98ee583ba4f26377562aeb0897e8f","abstract_canon_sha256":"80ec3b1b56aad3c7ed3d5ea3eefda9454048996b0ed14efa16fbfae27b84ee66"},"schema_version":"1.0"},"canonical_sha256":"fe1b6de470823cb2994b1cb0759ecd680630d1047dae977b04b72290c521f592","source":{"kind":"arxiv","id":"astro-ph/9808305","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9808305","created_at":"2026-07-04T16:06:58Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9808305v2","created_at":"2026-07-04T16:06:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9808305","created_at":"2026-07-04T16:06:58Z"},{"alias_kind":"pith_short_12","alias_value":"7YNW3ZDQQI6L","created_at":"2026-07-04T16:06:58Z"},{"alias_kind":"pith_short_16","alias_value":"7YNW3ZDQQI6LFGKL","created_at":"2026-07-04T16:06:58Z"},{"alias_kind":"pith_short_8","alias_value":"7YNW3ZDQ","created_at":"2026-07-04T16:06:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1998:7YNW3ZDQQI6LFGKLDSYHLHWNNA","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9808305","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1998-08-26T21:35:31Z","cross_cats_sorted":[],"title_canon_sha256":"309bfd365fc60c6349e7c95901473d6ebec98ee583ba4f26377562aeb0897e8f","abstract_canon_sha256":"80ec3b1b56aad3c7ed3d5ea3eefda9454048996b0ed14efa16fbfae27b84ee66"},"schema_version":"1.0"},"canonical_sha256":"fe1b6de470823cb2994b1cb0759ecd680630d1047dae977b04b72290c521f592","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:06:58.083520Z","signature_b64":"3Qm55gkGGNV8PtBL8uilgMxcaZwiQ8xezUliUhxYMbsrimo7x6QNekaEELZWFK32OlytUH9CVM3V7fSgVzFECg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fe1b6de470823cb2994b1cb0759ecd680630d1047dae977b04b72290c521f592","last_reissued_at":"2026-07-04T16:06:58.083143Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:06:58.083143Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9808305","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":"2026-07-04T16:06:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ojR6GH5ekDa5DZ1OVoyluGTEYQtjh6B1WVSnj92JZHau5p603HQwv08c6aIQa34DPUp1URcre4kquUwuaUlADQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T14:48:02.408426Z"},"content_sha256":"6b2eb8d88ca194ebc7ed27f1960dd6c3ab8362ca149c69422a0e2496a9d6be0c","schema_version":"1.0","event_id":"sha256:6b2eb8d88ca194ebc7ed27f1960dd6c3ab8362ca149c69422a0e2496a9d6be0c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1998:7YNW3ZDQQI6LFGKLDSYHLHWNNA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Bispectrum as a Signature of Gravitational Instability in Redshift-Space","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"H.M.P. Couchman, Joshua A. Frieman, Roman Scoccimarro","submitted_at":"1998-08-26T21:35:31Z","abstract_excerpt":"The bispectrum provides a characteristic signature of gravitational instability that can be used to probe the Gaussianity of the initial conditions and the bias of the galaxy distribution. We study how this signature is affected by redshift distortions using perturbation theory and high-resolution numerical simulations. We obtain perturbative results for the multipole expansion of the redshift-space bispectrum which provide a natural way to break the degeneracy between bias and $\\Omega$ present in measurements of the redshift-space power spectrum. We propose a phenomenological model that incor"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9808305","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/astro-ph/9808305/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":"2026-07-04T16:06:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"R438rbD1cswcbBh17UV50L1FF40/lekV9U6tm3UoZhithPEyIBrNdQbnswGIeyL1LrblhWW2uc8AohsH/x3VBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T14:48:02.408936Z"},"content_sha256":"0e26b6be958028cf7f33cf5bcd5c09fcf0e0d7fbbc90640322636d18a9278683","schema_version":"1.0","event_id":"sha256:0e26b6be958028cf7f33cf5bcd5c09fcf0e0d7fbbc90640322636d18a9278683"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7YNW3ZDQQI6LFGKLDSYHLHWNNA/bundle.json","state_url":"https://pith.science/pith/7YNW3ZDQQI6LFGKLDSYHLHWNNA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7YNW3ZDQQI6LFGKLDSYHLHWNNA/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":"2026-08-10T14:48:02Z","links":{"resolver":"https://pith.science/pith/7YNW3ZDQQI6LFGKLDSYHLHWNNA","bundle":"https://pith.science/pith/7YNW3ZDQQI6LFGKLDSYHLHWNNA/bundle.json","state":"https://pith.science/pith/7YNW3ZDQQI6LFGKLDSYHLHWNNA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7YNW3ZDQQI6LFGKLDSYHLHWNNA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1998:7YNW3ZDQQI6LFGKLDSYHLHWNNA","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":"80ec3b1b56aad3c7ed3d5ea3eefda9454048996b0ed14efa16fbfae27b84ee66","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1998-08-26T21:35:31Z","title_canon_sha256":"309bfd365fc60c6349e7c95901473d6ebec98ee583ba4f26377562aeb0897e8f"},"schema_version":"1.0","source":{"id":"astro-ph/9808305","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9808305","created_at":"2026-07-04T16:06:58Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9808305v2","created_at":"2026-07-04T16:06:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9808305","created_at":"2026-07-04T16:06:58Z"},{"alias_kind":"pith_short_12","alias_value":"7YNW3ZDQQI6L","created_at":"2026-07-04T16:06:58Z"},{"alias_kind":"pith_short_16","alias_value":"7YNW3ZDQQI6LFGKL","created_at":"2026-07-04T16:06:58Z"},{"alias_kind":"pith_short_8","alias_value":"7YNW3ZDQ","created_at":"2026-07-04T16:06:58Z"}],"graph_snapshots":[{"event_id":"sha256:0e26b6be958028cf7f33cf5bcd5c09fcf0e0d7fbbc90640322636d18a9278683","target":"graph","created_at":"2026-07-04T16:06:58Z","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/astro-ph/9808305/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The bispectrum provides a characteristic signature of gravitational instability that can be used to probe the Gaussianity of the initial conditions and the bias of the galaxy distribution. We study how this signature is affected by redshift distortions using perturbation theory and high-resolution numerical simulations. We obtain perturbative results for the multipole expansion of the redshift-space bispectrum which provide a natural way to break the degeneracy between bias and $\\Omega$ present in measurements of the redshift-space power spectrum. We propose a phenomenological model that incor","authors_text":"H.M.P. Couchman, Joshua A. Frieman, Roman Scoccimarro","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1998-08-26T21:35:31Z","title":"The Bispectrum as a Signature of Gravitational Instability in Redshift-Space"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9808305","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":"sha256:6b2eb8d88ca194ebc7ed27f1960dd6c3ab8362ca149c69422a0e2496a9d6be0c","target":"record","created_at":"2026-07-04T16:06:58Z","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":"80ec3b1b56aad3c7ed3d5ea3eefda9454048996b0ed14efa16fbfae27b84ee66","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1998-08-26T21:35:31Z","title_canon_sha256":"309bfd365fc60c6349e7c95901473d6ebec98ee583ba4f26377562aeb0897e8f"},"schema_version":"1.0","source":{"id":"astro-ph/9808305","kind":"arxiv","version":2}},"canonical_sha256":"fe1b6de470823cb2994b1cb0759ecd680630d1047dae977b04b72290c521f592","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fe1b6de470823cb2994b1cb0759ecd680630d1047dae977b04b72290c521f592","first_computed_at":"2026-07-04T16:06:58.083143Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:06:58.083143Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3Qm55gkGGNV8PtBL8uilgMxcaZwiQ8xezUliUhxYMbsrimo7x6QNekaEELZWFK32OlytUH9CVM3V7fSgVzFECg==","signature_status":"signed_v1","signed_at":"2026-07-04T16:06:58.083520Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9808305","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6b2eb8d88ca194ebc7ed27f1960dd6c3ab8362ca149c69422a0e2496a9d6be0c","sha256:0e26b6be958028cf7f33cf5bcd5c09fcf0e0d7fbbc90640322636d18a9278683"],"state_sha256":"4def3cf5d448c92172f47bba1593ce56f848906e719e6f52635ace1d47d6757a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"raQ+KlkX2EHsJzSdYVPgtLsTEQtzZakYXuXIpyrCM8ycgJFY/URI0gJSudcsw0gvtUOho1cOKyJh/01c7lbhDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-10T14:48:02.413980Z","bundle_sha256":"19414711a89c5896db89745b558571882e61dc76b3e738d464085bb085085331"}}