{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:Y356GE2YT3AZVXP5KHZ6WVNBZQ","short_pith_number":"pith:Y356GE2Y","canonical_record":{"source":{"id":"2106.02591","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-06-04T16:41:33Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"f1baba6c840d125a898b6a146312bdcf016481d97ffd36bf4e493c9d3f8ba5f6","abstract_canon_sha256":"aecd5a127a6d8a41ec1425011a3c893fa4fe2f93922e5ae1ddab23fd1ccc311b"},"schema_version":"1.0"},"canonical_sha256":"c6fbe313589ec19addfd51f3eb55a1cc3ab3fd2c20c5e5de4a9e200edadce28f","source":{"kind":"arxiv","id":"2106.02591","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2106.02591","created_at":"2026-07-05T03:45:33Z"},{"alias_kind":"arxiv_version","alias_value":"2106.02591v2","created_at":"2026-07-05T03:45:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2106.02591","created_at":"2026-07-05T03:45:33Z"},{"alias_kind":"pith_short_12","alias_value":"Y356GE2YT3AZ","created_at":"2026-07-05T03:45:33Z"},{"alias_kind":"pith_short_16","alias_value":"Y356GE2YT3AZVXP5","created_at":"2026-07-05T03:45:33Z"},{"alias_kind":"pith_short_8","alias_value":"Y356GE2Y","created_at":"2026-07-05T03:45:33Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:Y356GE2YT3AZVXP5KHZ6WVNBZQ","target":"record","payload":{"canonical_record":{"source":{"id":"2106.02591","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-06-04T16:41:33Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"f1baba6c840d125a898b6a146312bdcf016481d97ffd36bf4e493c9d3f8ba5f6","abstract_canon_sha256":"aecd5a127a6d8a41ec1425011a3c893fa4fe2f93922e5ae1ddab23fd1ccc311b"},"schema_version":"1.0"},"canonical_sha256":"c6fbe313589ec19addfd51f3eb55a1cc3ab3fd2c20c5e5de4a9e200edadce28f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:45:33.516446Z","signature_b64":"ykNgcn68iqJtWiTYJaEgcWmGO3j2hHNAWFLqHRUMaLnDqkG751ITPx/JFeJMhMzdNwFOPqBxsEIC3lzaRNQ5BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c6fbe313589ec19addfd51f3eb55a1cc3ab3fd2c20c5e5de4a9e200edadce28f","last_reissued_at":"2026-07-05T03:45:33.515996Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:45:33.515996Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2106.02591","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":"2026-07-05T03:45:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Dkyp12i89uL3T+2MDc+YtaVlxPMne6ek6TxnI3fMkYqbNzun/2lIpef3xJPiCjCRdvipTjE0BLdjSOfF7CTVCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T05:42:17.595493Z"},"content_sha256":"08cf00c1c5a5b53ac3f5c432491d823aaac38d93e8cbfe17f8892105dfc96f88","schema_version":"1.0","event_id":"sha256:08cf00c1c5a5b53ac3f5c432491d823aaac38d93e8cbfe17f8892105dfc96f88"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:Y356GE2YT3AZVXP5KHZ6WVNBZQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Cross-correlating Astrophysical and Cosmological Gravitational Wave Backgrounds with the Cosmic Microwave Background","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"astro-ph.CO","authors_text":"Angelo Ricciardone, Daniele Bertacca, Lorenzo Valbusa Dall'Armi, Michele Liguori, Nicola Bartolo, Sabino Matarrese","submitted_at":"2021-06-04T16:41:33Z","abstract_excerpt":"General Relativity provides us with an extremely powerful tool to extract at the same time astrophysical and cosmological information from the Stochastic Gravitational Wave Backgrounds (SGWBs): the cross-correlation with other cosmological tracers, since their anisotropies share a common origin and the same perturbed geodesics. In this letter we explore the cross-correlation of the cosmological and astrophysical SGWBs with Cosmic Microwave Background (CMB) anisotropies, showing that future GW detectors, such as LISA or BBO, have the ability to measure such cross-correlation signals. We also pr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2106.02591","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/2106.02591/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":"2026-07-05T03:45:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RJHWk6JlBj6PoG4OnOCnA3b1gWXwt4AyI+knUsygD1LEhy6V9vLOOr4vpWfuj9obmXBOLmvy3c0qDPnKJW+wBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T05:42:17.596019Z"},"content_sha256":"10d7cc277a4e5a5743459fd94370b396b2d30a15679c76048877206bc794e931","schema_version":"1.0","event_id":"sha256:10d7cc277a4e5a5743459fd94370b396b2d30a15679c76048877206bc794e931"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Y356GE2YT3AZVXP5KHZ6WVNBZQ/bundle.json","state_url":"https://pith.science/pith/Y356GE2YT3AZVXP5KHZ6WVNBZQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Y356GE2YT3AZVXP5KHZ6WVNBZQ/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":"2026-08-10T05:42:17Z","links":{"resolver":"https://pith.science/pith/Y356GE2YT3AZVXP5KHZ6WVNBZQ","bundle":"https://pith.science/pith/Y356GE2YT3AZVXP5KHZ6WVNBZQ/bundle.json","state":"https://pith.science/pith/Y356GE2YT3AZVXP5KHZ6WVNBZQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Y356GE2YT3AZVXP5KHZ6WVNBZQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:Y356GE2YT3AZVXP5KHZ6WVNBZQ","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":"aecd5a127a6d8a41ec1425011a3c893fa4fe2f93922e5ae1ddab23fd1ccc311b","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-06-04T16:41:33Z","title_canon_sha256":"f1baba6c840d125a898b6a146312bdcf016481d97ffd36bf4e493c9d3f8ba5f6"},"schema_version":"1.0","source":{"id":"2106.02591","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2106.02591","created_at":"2026-07-05T03:45:33Z"},{"alias_kind":"arxiv_version","alias_value":"2106.02591v2","created_at":"2026-07-05T03:45:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2106.02591","created_at":"2026-07-05T03:45:33Z"},{"alias_kind":"pith_short_12","alias_value":"Y356GE2YT3AZ","created_at":"2026-07-05T03:45:33Z"},{"alias_kind":"pith_short_16","alias_value":"Y356GE2YT3AZVXP5","created_at":"2026-07-05T03:45:33Z"},{"alias_kind":"pith_short_8","alias_value":"Y356GE2Y","created_at":"2026-07-05T03:45:33Z"}],"graph_snapshots":[{"event_id":"sha256:10d7cc277a4e5a5743459fd94370b396b2d30a15679c76048877206bc794e931","target":"graph","created_at":"2026-07-05T03:45:33Z","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/2106.02591/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"General Relativity provides us with an extremely powerful tool to extract at the same time astrophysical and cosmological information from the Stochastic Gravitational Wave Backgrounds (SGWBs): the cross-correlation with other cosmological tracers, since their anisotropies share a common origin and the same perturbed geodesics. In this letter we explore the cross-correlation of the cosmological and astrophysical SGWBs with Cosmic Microwave Background (CMB) anisotropies, showing that future GW detectors, such as LISA or BBO, have the ability to measure such cross-correlation signals. We also pr","authors_text":"Angelo Ricciardone, Daniele Bertacca, Lorenzo Valbusa Dall'Armi, Michele Liguori, Nicola Bartolo, Sabino Matarrese","cross_cats":["gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-06-04T16:41:33Z","title":"Cross-correlating Astrophysical and Cosmological Gravitational Wave Backgrounds with the Cosmic Microwave Background"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2106.02591","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":"sha256:08cf00c1c5a5b53ac3f5c432491d823aaac38d93e8cbfe17f8892105dfc96f88","target":"record","created_at":"2026-07-05T03:45:33Z","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":"aecd5a127a6d8a41ec1425011a3c893fa4fe2f93922e5ae1ddab23fd1ccc311b","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2021-06-04T16:41:33Z","title_canon_sha256":"f1baba6c840d125a898b6a146312bdcf016481d97ffd36bf4e493c9d3f8ba5f6"},"schema_version":"1.0","source":{"id":"2106.02591","kind":"arxiv","version":2}},"canonical_sha256":"c6fbe313589ec19addfd51f3eb55a1cc3ab3fd2c20c5e5de4a9e200edadce28f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c6fbe313589ec19addfd51f3eb55a1cc3ab3fd2c20c5e5de4a9e200edadce28f","first_computed_at":"2026-07-05T03:45:33.515996Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:45:33.515996Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ykNgcn68iqJtWiTYJaEgcWmGO3j2hHNAWFLqHRUMaLnDqkG751ITPx/JFeJMhMzdNwFOPqBxsEIC3lzaRNQ5BQ==","signature_status":"signed_v1","signed_at":"2026-07-05T03:45:33.516446Z","signed_message":"canonical_sha256_bytes"},"source_id":"2106.02591","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:08cf00c1c5a5b53ac3f5c432491d823aaac38d93e8cbfe17f8892105dfc96f88","sha256:10d7cc277a4e5a5743459fd94370b396b2d30a15679c76048877206bc794e931"],"state_sha256":"c763f178735a607a4179da29e3249e7dfcd2f76fa83cc4d8b42c7f9c748c0f87"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Y9iDg0LFB6Nt8kGwsLs7XjNwBoggS1Jfz621GoUXkPUGm7SVgnLgXGYfCYDmTr54ejV7MoDfjSFp7lZkvGQUAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-10T05:42:17.601470Z","bundle_sha256":"964104ce398fd7622cbfd73fb26bde5727fd20bc63af1dff3ce7d19a3ad6c5c1"}}