{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:L76G7GCAWX7RZG4KMXYLZ5QKJW","short_pith_number":"pith:L76G7GCA","canonical_record":{"source":{"id":"2605.17983","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-05-18T07:37:48Z","cross_cats_sorted":["astro-ph.GA","gr-qc"],"title_canon_sha256":"50dcee99bc124122da89771b3e08fa3ffce979d5274a77e0030be6907302c330","abstract_canon_sha256":"f105d937400a003325a5484eca79978c5e2ee79a353c52f79d525320746b6c7f"},"schema_version":"1.0"},"canonical_sha256":"5ffc6f9840b5ff1c9b8a65f0bcf60a4d93471257e9ee948b723571e9605c7a9e","source":{"kind":"arxiv","id":"2605.17983","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.17983","created_at":"2026-05-20T00:05:09Z"},{"alias_kind":"arxiv_version","alias_value":"2605.17983v1","created_at":"2026-05-20T00:05:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.17983","created_at":"2026-05-20T00:05:09Z"},{"alias_kind":"pith_short_12","alias_value":"L76G7GCAWX7R","created_at":"2026-05-20T00:05:09Z"},{"alias_kind":"pith_short_16","alias_value":"L76G7GCAWX7RZG4K","created_at":"2026-05-20T00:05:09Z"},{"alias_kind":"pith_short_8","alias_value":"L76G7GCA","created_at":"2026-05-20T00:05:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:L76G7GCAWX7RZG4KMXYLZ5QKJW","target":"record","payload":{"canonical_record":{"source":{"id":"2605.17983","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-05-18T07:37:48Z","cross_cats_sorted":["astro-ph.GA","gr-qc"],"title_canon_sha256":"50dcee99bc124122da89771b3e08fa3ffce979d5274a77e0030be6907302c330","abstract_canon_sha256":"f105d937400a003325a5484eca79978c5e2ee79a353c52f79d525320746b6c7f"},"schema_version":"1.0"},"canonical_sha256":"5ffc6f9840b5ff1c9b8a65f0bcf60a4d93471257e9ee948b723571e9605c7a9e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-20T00:05:09.474821Z","signature_b64":"YG3N0SD07OpAcK/zSBtlUbiUVlL+zmAv5Y8Nxc+0ysEWZhGKB0sm8nBWnhozl17l1ESGtW9clydXTJaFgRn3Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5ffc6f9840b5ff1c9b8a65f0bcf60a4d93471257e9ee948b723571e9605c7a9e","last_reissued_at":"2026-05-20T00:05:09.473899Z","signature_status":"signed_v1","first_computed_at":"2026-05-20T00:05:09.473899Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2605.17983","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-20T00:05:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0fsUhyrKePGwDFcFbjr5fVT4FeHFaOAvvWbk8UO1tApQNHv2nr7QBpnWACWbC1WS9nqYeSmsQwZNyfM2xiMgCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T05:12:20.294937Z"},"content_sha256":"d2f7ce19065906e53921a86ca7dbab0abd65ab77611c422613ca4c39609174e9","schema_version":"1.0","event_id":"sha256:d2f7ce19065906e53921a86ca7dbab0abd65ab77611c422613ca4c39609174e9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:L76G7GCAWX7RZG4KMXYLZ5QKJW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Higher-order statistics of the stochastic gravitational wave background from supermassive black hole binaries","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA","gr-qc"],"primary_cat":"astro-ph.HE","authors_text":"Hinano Hisamamtsu, Koutarou Kyutoku","submitted_at":"2026-05-18T07:37:48Z","abstract_excerpt":"Recent progress in gravitational wave observations has positioned Pulsar Timing Arrays as a key tool for detecting the stochastic gravitational wave background in the nanohertz band. It is widely believed that this background is primarily attributed to the cosmic ensemble of inspiraling supermassive black hole binaries. While traditional analyses have predominantly focused on the spectral amplitude and frequency dependence of the gravitational wave background, higher-order statistics such as variance, skewness, and kurtosis could potentially be useful for extracting further physical informatio"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.17983","kind":"arxiv","version":1},"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/2605.17983/integrity.json","findings":[],"available":true,"detectors_run":[{"name":"ai_meta_artifact","ran_at":"2026-05-19T23:33:35.561424Z","status":"skipped","version":"1.0.0","findings_count":0}],"snapshot_sha256":"dfbaa0d11d6b65b67d88f38f628877affb52e484e43fed4563902dda784bf3be"},"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":"2026-05-20T00:05:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ujq2HaGw5vXgkyHXcHwN6Hi5QbvFTRWAbsoBmV4M2A+2IyouUcS/lXJAaQKhQPvoi9C0f+uc8wsCsVBFYKB3Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T05:12:20.295356Z"},"content_sha256":"6933a2b4fd4fe7a04ddc74915618f551e852761d5c51ec2808e3cd35e2ada089","schema_version":"1.0","event_id":"sha256:6933a2b4fd4fe7a04ddc74915618f551e852761d5c51ec2808e3cd35e2ada089"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/L76G7GCAWX7RZG4KMXYLZ5QKJW/bundle.json","state_url":"https://pith.science/pith/L76G7GCAWX7RZG4KMXYLZ5QKJW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/L76G7GCAWX7RZG4KMXYLZ5QKJW/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":"2026-06-03T05:12:20Z","links":{"resolver":"https://pith.science/pith/L76G7GCAWX7RZG4KMXYLZ5QKJW","bundle":"https://pith.science/pith/L76G7GCAWX7RZG4KMXYLZ5QKJW/bundle.json","state":"https://pith.science/pith/L76G7GCAWX7RZG4KMXYLZ5QKJW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/L76G7GCAWX7RZG4KMXYLZ5QKJW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:L76G7GCAWX7RZG4KMXYLZ5QKJW","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":"f105d937400a003325a5484eca79978c5e2ee79a353c52f79d525320746b6c7f","cross_cats_sorted":["astro-ph.GA","gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-05-18T07:37:48Z","title_canon_sha256":"50dcee99bc124122da89771b3e08fa3ffce979d5274a77e0030be6907302c330"},"schema_version":"1.0","source":{"id":"2605.17983","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.17983","created_at":"2026-05-20T00:05:09Z"},{"alias_kind":"arxiv_version","alias_value":"2605.17983v1","created_at":"2026-05-20T00:05:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.17983","created_at":"2026-05-20T00:05:09Z"},{"alias_kind":"pith_short_12","alias_value":"L76G7GCAWX7R","created_at":"2026-05-20T00:05:09Z"},{"alias_kind":"pith_short_16","alias_value":"L76G7GCAWX7RZG4K","created_at":"2026-05-20T00:05:09Z"},{"alias_kind":"pith_short_8","alias_value":"L76G7GCA","created_at":"2026-05-20T00:05:09Z"}],"graph_snapshots":[{"event_id":"sha256:6933a2b4fd4fe7a04ddc74915618f551e852761d5c51ec2808e3cd35e2ada089","target":"graph","created_at":"2026-05-20T00:05:09Z","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":[{"findings_count":0,"name":"ai_meta_artifact","ran_at":"2026-05-19T23:33:35.561424Z","status":"skipped","version":"1.0.0"}],"endpoint":"/pith/2605.17983/integrity.json","findings":[],"snapshot_sha256":"dfbaa0d11d6b65b67d88f38f628877affb52e484e43fed4563902dda784bf3be","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Recent progress in gravitational wave observations has positioned Pulsar Timing Arrays as a key tool for detecting the stochastic gravitational wave background in the nanohertz band. It is widely believed that this background is primarily attributed to the cosmic ensemble of inspiraling supermassive black hole binaries. While traditional analyses have predominantly focused on the spectral amplitude and frequency dependence of the gravitational wave background, higher-order statistics such as variance, skewness, and kurtosis could potentially be useful for extracting further physical informatio","authors_text":"Hinano Hisamamtsu, Koutarou Kyutoku","cross_cats":["astro-ph.GA","gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-05-18T07:37:48Z","title":"Higher-order statistics of the stochastic gravitational wave background from supermassive black hole binaries"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.17983","kind":"arxiv","version":1},"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:d2f7ce19065906e53921a86ca7dbab0abd65ab77611c422613ca4c39609174e9","target":"record","created_at":"2026-05-20T00:05:09Z","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":"f105d937400a003325a5484eca79978c5e2ee79a353c52f79d525320746b6c7f","cross_cats_sorted":["astro-ph.GA","gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-05-18T07:37:48Z","title_canon_sha256":"50dcee99bc124122da89771b3e08fa3ffce979d5274a77e0030be6907302c330"},"schema_version":"1.0","source":{"id":"2605.17983","kind":"arxiv","version":1}},"canonical_sha256":"5ffc6f9840b5ff1c9b8a65f0bcf60a4d93471257e9ee948b723571e9605c7a9e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5ffc6f9840b5ff1c9b8a65f0bcf60a4d93471257e9ee948b723571e9605c7a9e","first_computed_at":"2026-05-20T00:05:09.473899Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-20T00:05:09.473899Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"YG3N0SD07OpAcK/zSBtlUbiUVlL+zmAv5Y8Nxc+0ysEWZhGKB0sm8nBWnhozl17l1ESGtW9clydXTJaFgRn3Ag==","signature_status":"signed_v1","signed_at":"2026-05-20T00:05:09.474821Z","signed_message":"canonical_sha256_bytes"},"source_id":"2605.17983","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d2f7ce19065906e53921a86ca7dbab0abd65ab77611c422613ca4c39609174e9","sha256:6933a2b4fd4fe7a04ddc74915618f551e852761d5c51ec2808e3cd35e2ada089"],"state_sha256":"24ac1647eec5a95f582d19d92ca2fd196f5be65bd7a5e3026632d56e3f4dbb88"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"W41FVBeYbFWRW1qj7z7CObXJqdKYZNJmV3it9xIKkKZkROAJstCZZutuTSm3gT2aZwKqebxmlH82i53FnY7FAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T05:12:20.297467Z","bundle_sha256":"df9021703de0d8c716a3ff5aa82d37474e94ea637a6f12242d7f305fe3a6a4cb"}}