{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:K2H6QWNUYNHLOSNHW5RASWMY43","short_pith_number":"pith:K2H6QWNU","canonical_record":{"source":{"id":"1807.00786","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-07-02T17:01:37Z","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"title_canon_sha256":"a0549ab11d98a01696e5bf897b9450d26e89b3f2c7cfb47ef8ee83a71ac4f084","abstract_canon_sha256":"f6fff7602d77e24427da886df7061c6a64427b4cd47acb7b1f035a9d00695f6e"},"schema_version":"1.0"},"canonical_sha256":"568fe859b4c34eb749a7b762095998e6cc045dfec1f4a3b969d02b14d636b78f","source":{"kind":"arxiv","id":"1807.00786","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.00786","created_at":"2026-05-18T00:00:02Z"},{"alias_kind":"arxiv_version","alias_value":"1807.00786v2","created_at":"2026-05-18T00:00:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.00786","created_at":"2026-05-18T00:00:02Z"},{"alias_kind":"pith_short_12","alias_value":"K2H6QWNUYNHL","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_16","alias_value":"K2H6QWNUYNHLOSNH","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_8","alias_value":"K2H6QWNU","created_at":"2026-05-18T12:32:33Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:K2H6QWNUYNHLOSNHW5RASWMY43","target":"record","payload":{"canonical_record":{"source":{"id":"1807.00786","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-07-02T17:01:37Z","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"title_canon_sha256":"a0549ab11d98a01696e5bf897b9450d26e89b3f2c7cfb47ef8ee83a71ac4f084","abstract_canon_sha256":"f6fff7602d77e24427da886df7061c6a64427b4cd47acb7b1f035a9d00695f6e"},"schema_version":"1.0"},"canonical_sha256":"568fe859b4c34eb749a7b762095998e6cc045dfec1f4a3b969d02b14d636b78f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:00:02.006026Z","signature_b64":"KwrfblltpT6ph/GYu0Ko3Qg/z9v4nn01uPVbsjEwNBYaagtjakV/V8nmdj6ulTk9hgFFEiXQWK9ag3rCwt7vBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"568fe859b4c34eb749a7b762095998e6cc045dfec1f4a3b969d02b14d636b78f","last_reissued_at":"2026-05-18T00:00:02.005477Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:00:02.005477Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1807.00786","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":"2026-05-18T00:00:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SqDucNjIzKIhmBcTIATOr1XmdQFlO6Dg2UI/tkj46Az82zsWojanls4a/LciUFUv6DUfeY/m1C57VsPJRp+3Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T11:41:32.301292Z"},"content_sha256":"a3c63bc204bee04d1b4a87a11667ec11642d3e982d34e8b2d56f886d6fbf129b","schema_version":"1.0","event_id":"sha256:a3c63bc204bee04d1b4a87a11667ec11642d3e982d34e8b2d56f886d6fbf129b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:K2H6QWNUYNHLOSNHW5RASWMY43","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Probing the Universe through the Stochastic Gravitational Wave Background","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","hep-ph","hep-th"],"primary_cat":"astro-ph.CO","authors_text":"Sachiko Kuroyanagi, Takeshi Chiba, Tomo Takahashi","submitted_at":"2018-07-02T17:01:37Z","abstract_excerpt":"Stochastic gravitational wave backgrounds, predicted in many models of the early universe and also generated by various astrophysical processes, are a powerful probe of the Universe. The spectral shape is key information to distinguish the origin of the background since different production mechanisms predict different shapes of the spectrum. In this paper, we investigate how precisely future gravitational wave detectors can determine the spectral shape using single and broken power-law templates. We consider the detector network of Advanced-LIGO, Advanced-Virgo and KAGRA and the space-based g"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.00786","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":""},"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":"2026-05-18T00:00:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DFtbCsvHWetf1+8uQ0IE8xm7TVHnuP0TWjYfzT/3fYeh0pjJR3Ynk1XhqQAMDwI+ZI0sRAEFl/pF7n1C2uLoDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T11:41:32.301744Z"},"content_sha256":"8d9bf518a6a17af4053c760e526fc52ceb4bb6752b6a1185fa85ce47536e6a36","schema_version":"1.0","event_id":"sha256:8d9bf518a6a17af4053c760e526fc52ceb4bb6752b6a1185fa85ce47536e6a36"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/K2H6QWNUYNHLOSNHW5RASWMY43/bundle.json","state_url":"https://pith.science/pith/K2H6QWNUYNHLOSNHW5RASWMY43/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/K2H6QWNUYNHLOSNHW5RASWMY43/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":"2026-08-06T11:41:32Z","links":{"resolver":"https://pith.science/pith/K2H6QWNUYNHLOSNHW5RASWMY43","bundle":"https://pith.science/pith/K2H6QWNUYNHLOSNHW5RASWMY43/bundle.json","state":"https://pith.science/pith/K2H6QWNUYNHLOSNHW5RASWMY43/state.json","well_known_bundle":"https://pith.science/.well-known/pith/K2H6QWNUYNHLOSNHW5RASWMY43/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:K2H6QWNUYNHLOSNHW5RASWMY43","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":"f6fff7602d77e24427da886df7061c6a64427b4cd47acb7b1f035a9d00695f6e","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-07-02T17:01:37Z","title_canon_sha256":"a0549ab11d98a01696e5bf897b9450d26e89b3f2c7cfb47ef8ee83a71ac4f084"},"schema_version":"1.0","source":{"id":"1807.00786","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.00786","created_at":"2026-05-18T00:00:02Z"},{"alias_kind":"arxiv_version","alias_value":"1807.00786v2","created_at":"2026-05-18T00:00:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.00786","created_at":"2026-05-18T00:00:02Z"},{"alias_kind":"pith_short_12","alias_value":"K2H6QWNUYNHL","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_16","alias_value":"K2H6QWNUYNHLOSNH","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_8","alias_value":"K2H6QWNU","created_at":"2026-05-18T12:32:33Z"}],"graph_snapshots":[{"event_id":"sha256:8d9bf518a6a17af4053c760e526fc52ceb4bb6752b6a1185fa85ce47536e6a36","target":"graph","created_at":"2026-05-18T00:00:02Z","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"},"paper":{"abstract_excerpt":"Stochastic gravitational wave backgrounds, predicted in many models of the early universe and also generated by various astrophysical processes, are a powerful probe of the Universe. The spectral shape is key information to distinguish the origin of the background since different production mechanisms predict different shapes of the spectrum. In this paper, we investigate how precisely future gravitational wave detectors can determine the spectral shape using single and broken power-law templates. We consider the detector network of Advanced-LIGO, Advanced-Virgo and KAGRA and the space-based g","authors_text":"Sachiko Kuroyanagi, Takeshi Chiba, Tomo Takahashi","cross_cats":["gr-qc","hep-ph","hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-07-02T17:01:37Z","title":"Probing the Universe through the Stochastic Gravitational Wave Background"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.00786","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:a3c63bc204bee04d1b4a87a11667ec11642d3e982d34e8b2d56f886d6fbf129b","target":"record","created_at":"2026-05-18T00:00:02Z","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":"f6fff7602d77e24427da886df7061c6a64427b4cd47acb7b1f035a9d00695f6e","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-07-02T17:01:37Z","title_canon_sha256":"a0549ab11d98a01696e5bf897b9450d26e89b3f2c7cfb47ef8ee83a71ac4f084"},"schema_version":"1.0","source":{"id":"1807.00786","kind":"arxiv","version":2}},"canonical_sha256":"568fe859b4c34eb749a7b762095998e6cc045dfec1f4a3b969d02b14d636b78f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"568fe859b4c34eb749a7b762095998e6cc045dfec1f4a3b969d02b14d636b78f","first_computed_at":"2026-05-18T00:00:02.005477Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:00:02.005477Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KwrfblltpT6ph/GYu0Ko3Qg/z9v4nn01uPVbsjEwNBYaagtjakV/V8nmdj6ulTk9hgFFEiXQWK9ag3rCwt7vBg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:00:02.006026Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.00786","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a3c63bc204bee04d1b4a87a11667ec11642d3e982d34e8b2d56f886d6fbf129b","sha256:8d9bf518a6a17af4053c760e526fc52ceb4bb6752b6a1185fa85ce47536e6a36"],"state_sha256":"f7bb3484a93a82551c73917c8835ded7a29f1fc8adc032d404e934d76efbaf5c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/X8qMwBzb+KgycXXMLQ/7a9fFUf2paFy2UQIzzI2BpnDL/xXGVIS1R7NDlMcos3XPm2lgo1opCTgPrTDQKRkAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T11:41:32.305700Z","bundle_sha256":"39ff3cf08968b64cc525c061b4102ffe8178c831da69e7ae751f418405adfe65"}}