{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:REQ2Q22NJQ7BUIVVBMI2JZPRCX","short_pith_number":"pith:REQ2Q22N","canonical_record":{"source":{"id":"2512.14307","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2025-12-16T11:23:43Z","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"title_canon_sha256":"a836c9e8c0abd1bace64f1c57cb3cf423eee8b6623c1750b148558752f6a1a41","abstract_canon_sha256":"72f6317d2756c947dc532572ce0416dbc849847486ac0fca91a1f232b89fb315"},"schema_version":"1.0"},"canonical_sha256":"8921a86b4d4c3e1a22b50b11a4e5f115f0b163bfbb217edf905f316ce40522fb","source":{"kind":"arxiv","id":"2512.14307","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2512.14307","created_at":"2026-07-13T00:17:05Z"},{"alias_kind":"arxiv_version","alias_value":"2512.14307v1","created_at":"2026-07-13T00:17:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2512.14307","created_at":"2026-07-13T00:17:05Z"},{"alias_kind":"pith_short_12","alias_value":"REQ2Q22NJQ7B","created_at":"2026-07-13T00:17:05Z"},{"alias_kind":"pith_short_16","alias_value":"REQ2Q22NJQ7BUIVV","created_at":"2026-07-13T00:17:05Z"},{"alias_kind":"pith_short_8","alias_value":"REQ2Q22N","created_at":"2026-07-13T00:17:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:REQ2Q22NJQ7BUIVVBMI2JZPRCX","target":"record","payload":{"canonical_record":{"source":{"id":"2512.14307","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2025-12-16T11:23:43Z","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"title_canon_sha256":"a836c9e8c0abd1bace64f1c57cb3cf423eee8b6623c1750b148558752f6a1a41","abstract_canon_sha256":"72f6317d2756c947dc532572ce0416dbc849847486ac0fca91a1f232b89fb315"},"schema_version":"1.0"},"canonical_sha256":"8921a86b4d4c3e1a22b50b11a4e5f115f0b163bfbb217edf905f316ce40522fb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-13T00:17:05.037169Z","signature_b64":"jnwTcSAevOvG6Z3vvKX0NGa6bydfCc7x0wkgLS57bt2+MLAT4Wx2VMc5lAfeVj3DLr6AfgIbruXMuSv0a7eFAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8921a86b4d4c3e1a22b50b11a4e5f115f0b163bfbb217edf905f316ce40522fb","last_reissued_at":"2026-07-13T00:17:05.035496Z","signature_status":"signed_v1","first_computed_at":"2026-07-13T00:17:05.035496Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2512.14307","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":"2026-07-13T00:17:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8OUVvGKUwYCyir7Xe9nOmKHpAh/oGabNvUOrcD5icO2gz/0cQTTFpYBwhczo0n7zFEuEodm+4owWnXBqqVjODw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T12:30:48.116465Z"},"content_sha256":"d6138793e59afc8fa5e722535c409a373abc5d64030afa536e819c2323c3c5cb","schema_version":"1.0","event_id":"sha256:d6138793e59afc8fa5e722535c409a373abc5d64030afa536e819c2323c3c5cb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:REQ2Q22NJQ7BUIVVBMI2JZPRCX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Invisible gravitons and large-scale magnetism","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["gr-qc","hep-ph","hep-th"],"primary_cat":"astro-ph.CO","authors_text":"Massimo Giovannini","submitted_at":"2025-12-16T11:23:43Z","abstract_excerpt":"The large-scale limits on the relic signals of gravitational radiation complement the bounds coming from the interferometric detectors (in the audio band) and from the pulsar timing arrays (in the nHz range). Within this inclusive perspective the spectral energy density of the gravitons is sharply suppressed in the aHz region even though the high frequency signal can be comparatively much larger both in the kHz and GHz domains. For there are no direct tests on the expansion rate prior to the formation of the light nuclei, a modified postinflationary timeline affects the total number of $e$-fol"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2512.14307","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/2512.14307/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":"2026-07-13T00:17:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OXrLaDhfdmsovA/yH4x56K8FRpknxnUYiNYFm8UdnlGifHNUePZ6oKUnaFWwXcIeQgfy2N7LABLHcQu5LafADQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T12:30:48.117404Z"},"content_sha256":"2f1e641e5551af2f3adff3937255108f48a42f477f2deff1c5ddfb98c8b80a61","schema_version":"1.0","event_id":"sha256:2f1e641e5551af2f3adff3937255108f48a42f477f2deff1c5ddfb98c8b80a61"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/REQ2Q22NJQ7BUIVVBMI2JZPRCX/bundle.json","state_url":"https://pith.science/pith/REQ2Q22NJQ7BUIVVBMI2JZPRCX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/REQ2Q22NJQ7BUIVVBMI2JZPRCX/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":"2026-08-05T12:30:48Z","links":{"resolver":"https://pith.science/pith/REQ2Q22NJQ7BUIVVBMI2JZPRCX","bundle":"https://pith.science/pith/REQ2Q22NJQ7BUIVVBMI2JZPRCX/bundle.json","state":"https://pith.science/pith/REQ2Q22NJQ7BUIVVBMI2JZPRCX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/REQ2Q22NJQ7BUIVVBMI2JZPRCX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:REQ2Q22NJQ7BUIVVBMI2JZPRCX","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":"72f6317d2756c947dc532572ce0416dbc849847486ac0fca91a1f232b89fb315","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2025-12-16T11:23:43Z","title_canon_sha256":"a836c9e8c0abd1bace64f1c57cb3cf423eee8b6623c1750b148558752f6a1a41"},"schema_version":"1.0","source":{"id":"2512.14307","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2512.14307","created_at":"2026-07-13T00:17:05Z"},{"alias_kind":"arxiv_version","alias_value":"2512.14307v1","created_at":"2026-07-13T00:17:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2512.14307","created_at":"2026-07-13T00:17:05Z"},{"alias_kind":"pith_short_12","alias_value":"REQ2Q22NJQ7B","created_at":"2026-07-13T00:17:05Z"},{"alias_kind":"pith_short_16","alias_value":"REQ2Q22NJQ7BUIVV","created_at":"2026-07-13T00:17:05Z"},{"alias_kind":"pith_short_8","alias_value":"REQ2Q22N","created_at":"2026-07-13T00:17:05Z"}],"graph_snapshots":[{"event_id":"sha256:2f1e641e5551af2f3adff3937255108f48a42f477f2deff1c5ddfb98c8b80a61","target":"graph","created_at":"2026-07-13T00:17:05Z","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/2512.14307/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The large-scale limits on the relic signals of gravitational radiation complement the bounds coming from the interferometric detectors (in the audio band) and from the pulsar timing arrays (in the nHz range). Within this inclusive perspective the spectral energy density of the gravitons is sharply suppressed in the aHz region even though the high frequency signal can be comparatively much larger both in the kHz and GHz domains. For there are no direct tests on the expansion rate prior to the formation of the light nuclei, a modified postinflationary timeline affects the total number of $e$-fol","authors_text":"Massimo Giovannini","cross_cats":["gr-qc","hep-ph","hep-th"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2025-12-16T11:23:43Z","title":"Invisible gravitons and large-scale magnetism"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2512.14307","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:d6138793e59afc8fa5e722535c409a373abc5d64030afa536e819c2323c3c5cb","target":"record","created_at":"2026-07-13T00:17:05Z","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":"72f6317d2756c947dc532572ce0416dbc849847486ac0fca91a1f232b89fb315","cross_cats_sorted":["gr-qc","hep-ph","hep-th"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2025-12-16T11:23:43Z","title_canon_sha256":"a836c9e8c0abd1bace64f1c57cb3cf423eee8b6623c1750b148558752f6a1a41"},"schema_version":"1.0","source":{"id":"2512.14307","kind":"arxiv","version":1}},"canonical_sha256":"8921a86b4d4c3e1a22b50b11a4e5f115f0b163bfbb217edf905f316ce40522fb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8921a86b4d4c3e1a22b50b11a4e5f115f0b163bfbb217edf905f316ce40522fb","first_computed_at":"2026-07-13T00:17:05.035496Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-13T00:17:05.035496Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jnwTcSAevOvG6Z3vvKX0NGa6bydfCc7x0wkgLS57bt2+MLAT4Wx2VMc5lAfeVj3DLr6AfgIbruXMuSv0a7eFAw==","signature_status":"signed_v1","signed_at":"2026-07-13T00:17:05.037169Z","signed_message":"canonical_sha256_bytes"},"source_id":"2512.14307","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d6138793e59afc8fa5e722535c409a373abc5d64030afa536e819c2323c3c5cb","sha256:2f1e641e5551af2f3adff3937255108f48a42f477f2deff1c5ddfb98c8b80a61"],"state_sha256":"7fd03565132593e6760202d96b761931a912d4c4a375306729f6a206c1500207"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cf8ryOh2+HLo6JIibZvOBsDebQ+SHQeIIT6iAUDHCWkU0EknFBmFfI4FBrLIJVEK/h7Pv10tFqu2LBi0uydnCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T12:30:48.125848Z","bundle_sha256":"8e53f2789606a0473dcb43106026c171e996601ddbea56a37d23b9034ad9e70a"}}