{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:YULDKJX2FV3UIM4UIFWTN5NDJN","short_pith_number":"pith:YULDKJX2","canonical_record":{"source":{"id":"2307.08552","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2023-07-17T15:14:47Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"a169c37c6621b4fc0fec2b8715c0896f3996045ba415dba5a6215b73c49f09c2","abstract_canon_sha256":"580d5d6821605dba495601fb863a580204acd46bc2844fe545f13e4ed52552d4"},"schema_version":"1.0"},"canonical_sha256":"c5163526fa2d77443394416d36f5a34b5f9cbb61ff627703a3858f0cf34ac869","source":{"kind":"arxiv","id":"2307.08552","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2307.08552","created_at":"2026-07-05T06:31:25Z"},{"alias_kind":"arxiv_version","alias_value":"2307.08552v1","created_at":"2026-07-05T06:31:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2307.08552","created_at":"2026-07-05T06:31:25Z"},{"alias_kind":"pith_short_12","alias_value":"YULDKJX2FV3U","created_at":"2026-07-05T06:31:25Z"},{"alias_kind":"pith_short_16","alias_value":"YULDKJX2FV3UIM4U","created_at":"2026-07-05T06:31:25Z"},{"alias_kind":"pith_short_8","alias_value":"YULDKJX2","created_at":"2026-07-05T06:31:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:YULDKJX2FV3UIM4UIFWTN5NDJN","target":"record","payload":{"canonical_record":{"source":{"id":"2307.08552","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2023-07-17T15:14:47Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"a169c37c6621b4fc0fec2b8715c0896f3996045ba415dba5a6215b73c49f09c2","abstract_canon_sha256":"580d5d6821605dba495601fb863a580204acd46bc2844fe545f13e4ed52552d4"},"schema_version":"1.0"},"canonical_sha256":"c5163526fa2d77443394416d36f5a34b5f9cbb61ff627703a3858f0cf34ac869","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:31:25.699907Z","signature_b64":"jkdXeW5DNoAtrGLbNy3XjSgha4rOy53haTC7bpSweDa71UoGQg+OzBJWqcTYNedq/Mj3v3PFmt7f2dqcU6DiBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c5163526fa2d77443394416d36f5a34b5f9cbb61ff627703a3858f0cf34ac869","last_reissued_at":"2026-07-05T06:31:25.699507Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:31:25.699507Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2307.08552","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":"2026-07-05T06:31:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"J99ZFyWrhGJWW1Dl3Bz/TQVMku0Xxt/qDI8tlDVyzXPye5ngwNX9mGANLzA1YKK5V/M6gDMSXOIELkM/DGLVBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T10:10:32.940194Z"},"content_sha256":"1c004ca06a741a989c682d722e61d2af887b94bddc619e50a204220c165d3b9c","schema_version":"1.0","event_id":"sha256:1c004ca06a741a989c682d722e61d2af887b94bddc619e50a204220c165d3b9c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:YULDKJX2FV3UIM4UIFWTN5NDJN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Scalar-induced gravitational wave interpretation of PTA data: the role of scalar fluctuation propagation speed","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"gr-qc","authors_text":"Gabriele Franciolini, Guillem Dom\\`enech, Shyam Balaji","submitted_at":"2023-07-17T15:14:47Z","abstract_excerpt":"Pulsar timing arrays gathered evidence of the presence of a gravitational wave background around nHz frequencies. If the gravitational wave background was induced by large and Gaussian primordial fluctuations, they would then produce too many sub-solar mass primordial black holes. We show that if at the time of gravitational wave generation the universe was dominated by a canonical scalar field, with the same equation of state as standard radiation but a higher propagation speed of fluctuations, one can explain the gravitational wave background with a primordial black hole counterpart consiste"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2307.08552","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/2307.08552/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":"2026-07-05T06:31:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kxkt9jZJP8HUPDzp+SWamDDhWoykb2ugdyfLlZe6kSGNu30r19R+fBsODgi01kBKLveKjhB7VH9/USHUHQpRAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T10:10:32.940754Z"},"content_sha256":"2e61788feb822920b356be2b3b5a0f45ca1bb315c1fb7a79701215678ef215aa","schema_version":"1.0","event_id":"sha256:2e61788feb822920b356be2b3b5a0f45ca1bb315c1fb7a79701215678ef215aa"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YULDKJX2FV3UIM4UIFWTN5NDJN/bundle.json","state_url":"https://pith.science/pith/YULDKJX2FV3UIM4UIFWTN5NDJN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YULDKJX2FV3UIM4UIFWTN5NDJN/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":"2026-08-06T10:10:32Z","links":{"resolver":"https://pith.science/pith/YULDKJX2FV3UIM4UIFWTN5NDJN","bundle":"https://pith.science/pith/YULDKJX2FV3UIM4UIFWTN5NDJN/bundle.json","state":"https://pith.science/pith/YULDKJX2FV3UIM4UIFWTN5NDJN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YULDKJX2FV3UIM4UIFWTN5NDJN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:YULDKJX2FV3UIM4UIFWTN5NDJN","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":"580d5d6821605dba495601fb863a580204acd46bc2844fe545f13e4ed52552d4","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2023-07-17T15:14:47Z","title_canon_sha256":"a169c37c6621b4fc0fec2b8715c0896f3996045ba415dba5a6215b73c49f09c2"},"schema_version":"1.0","source":{"id":"2307.08552","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2307.08552","created_at":"2026-07-05T06:31:25Z"},{"alias_kind":"arxiv_version","alias_value":"2307.08552v1","created_at":"2026-07-05T06:31:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2307.08552","created_at":"2026-07-05T06:31:25Z"},{"alias_kind":"pith_short_12","alias_value":"YULDKJX2FV3U","created_at":"2026-07-05T06:31:25Z"},{"alias_kind":"pith_short_16","alias_value":"YULDKJX2FV3UIM4U","created_at":"2026-07-05T06:31:25Z"},{"alias_kind":"pith_short_8","alias_value":"YULDKJX2","created_at":"2026-07-05T06:31:25Z"}],"graph_snapshots":[{"event_id":"sha256:2e61788feb822920b356be2b3b5a0f45ca1bb315c1fb7a79701215678ef215aa","target":"graph","created_at":"2026-07-05T06:31:25Z","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/2307.08552/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Pulsar timing arrays gathered evidence of the presence of a gravitational wave background around nHz frequencies. If the gravitational wave background was induced by large and Gaussian primordial fluctuations, they would then produce too many sub-solar mass primordial black holes. We show that if at the time of gravitational wave generation the universe was dominated by a canonical scalar field, with the same equation of state as standard radiation but a higher propagation speed of fluctuations, one can explain the gravitational wave background with a primordial black hole counterpart consiste","authors_text":"Gabriele Franciolini, Guillem Dom\\`enech, Shyam Balaji","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2023-07-17T15:14:47Z","title":"Scalar-induced gravitational wave interpretation of PTA data: the role of scalar fluctuation propagation speed"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2307.08552","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":"sha256:1c004ca06a741a989c682d722e61d2af887b94bddc619e50a204220c165d3b9c","target":"record","created_at":"2026-07-05T06:31:25Z","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":"580d5d6821605dba495601fb863a580204acd46bc2844fe545f13e4ed52552d4","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2023-07-17T15:14:47Z","title_canon_sha256":"a169c37c6621b4fc0fec2b8715c0896f3996045ba415dba5a6215b73c49f09c2"},"schema_version":"1.0","source":{"id":"2307.08552","kind":"arxiv","version":1}},"canonical_sha256":"c5163526fa2d77443394416d36f5a34b5f9cbb61ff627703a3858f0cf34ac869","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c5163526fa2d77443394416d36f5a34b5f9cbb61ff627703a3858f0cf34ac869","first_computed_at":"2026-07-05T06:31:25.699507Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:31:25.699507Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jkdXeW5DNoAtrGLbNy3XjSgha4rOy53haTC7bpSweDa71UoGQg+OzBJWqcTYNedq/Mj3v3PFmt7f2dqcU6DiBw==","signature_status":"signed_v1","signed_at":"2026-07-05T06:31:25.699907Z","signed_message":"canonical_sha256_bytes"},"source_id":"2307.08552","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1c004ca06a741a989c682d722e61d2af887b94bddc619e50a204220c165d3b9c","sha256:2e61788feb822920b356be2b3b5a0f45ca1bb315c1fb7a79701215678ef215aa"],"state_sha256":"eea3c1230e47a78a7c512f93aabdcde5c0debdbe39f3ba80c7e72d1d9aec254b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0rXxf5NLIvAVyOk27me0Dxcg1uhXHiE5xQs6s7GhgjQHmR0H5NwKMn2r2uBIqkagKV7xl5I8T9TJ5RCs6rNaBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T10:10:32.944412Z","bundle_sha256":"3ca93d3c33ba1f1caeb7562206c9572478d881c70e49a7d37550f4aadfa3954d"}}