{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:JWCMQKDMHRJDRKZZOXQQ5SANSU","short_pith_number":"pith:JWCMQKDM","canonical_record":{"source":{"id":"1410.6441","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-10-23T18:18:51Z","cross_cats_sorted":["astro-ph.CO","gr-qc"],"title_canon_sha256":"79e26038a32267d8ea2293d32fb8ed6029c89227fe6ae0b74ce4c3b6f59a6b68","abstract_canon_sha256":"4af97b7cf1ddd242ffb1bd49c3b4a2ae522e3034e9f4f1e318b28eacf6397beb"},"schema_version":"1.0"},"canonical_sha256":"4d84c8286c3c5238ab3975e10ec80d952ad53ffce2334e7b044d8622b7f55ee1","source":{"kind":"arxiv","id":"1410.6441","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1410.6441","created_at":"2026-05-18T01:41:40Z"},{"alias_kind":"arxiv_version","alias_value":"1410.6441v1","created_at":"2026-05-18T01:41:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1410.6441","created_at":"2026-05-18T01:41:40Z"},{"alias_kind":"pith_short_12","alias_value":"JWCMQKDMHRJD","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_16","alias_value":"JWCMQKDMHRJDRKZZ","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_8","alias_value":"JWCMQKDM","created_at":"2026-05-18T12:28:35Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:JWCMQKDMHRJDRKZZOXQQ5SANSU","target":"record","payload":{"canonical_record":{"source":{"id":"1410.6441","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-10-23T18:18:51Z","cross_cats_sorted":["astro-ph.CO","gr-qc"],"title_canon_sha256":"79e26038a32267d8ea2293d32fb8ed6029c89227fe6ae0b74ce4c3b6f59a6b68","abstract_canon_sha256":"4af97b7cf1ddd242ffb1bd49c3b4a2ae522e3034e9f4f1e318b28eacf6397beb"},"schema_version":"1.0"},"canonical_sha256":"4d84c8286c3c5238ab3975e10ec80d952ad53ffce2334e7b044d8622b7f55ee1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:41:40.425142Z","signature_b64":"/wsHaJM/5Q3cu0qlTPFT0z84Cs760EsR+btnuV1Hgbd1u7Izb+P52Ij4rZbMPGGFFgzF6UlamnM1xlA5deNvDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4d84c8286c3c5238ab3975e10ec80d952ad53ffce2334e7b044d8622b7f55ee1","last_reissued_at":"2026-05-18T01:41:40.424595Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:41:40.424595Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1410.6441","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":"2026-05-18T01:41:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NI15kx8STSx6x1CletL7F63HuxAfBDNn4XE7KksZncXTxGRylIl8HlV/cEgJoiry0XlfHaE9srosItp0g7ywBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T11:26:19.727608Z"},"content_sha256":"6b9cc39a637217d18a87e497eb8c34fa578afb782417dc379e4d707e4446254d","schema_version":"1.0","event_id":"sha256:6b9cc39a637217d18a87e497eb8c34fa578afb782417dc379e4d707e4446254d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:JWCMQKDMHRJDRKZZOXQQ5SANSU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Searching for A Generic Gravitational Wave Background via Bayesian Nonparametric Analysis with Pulsar Timing Arrays","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","gr-qc"],"primary_cat":"astro-ph.IM","authors_text":"Xihao Deng","submitted_at":"2014-10-23T18:18:51Z","abstract_excerpt":"Gravitational wave background results from the superposition of gravitational waves generated from all sources across the Universe. Previous efforts on detecting such a background with pulsar timing arrays assume it is an isotropic Gaussian background with a power law spectrum. However, when the number of sources is limited, the background might be non-Gaussian or the spectrum might not be a power law. Correspondingly previous analysis may not work effectively. Here we use a method --- Bayesian Nonparametric Analysis --- to try to detect a generic gravitational wave background, which directly "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1410.6441","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":""},"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":"2026-05-18T01:41:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1OLThhr4SPGllD2Ss/Q8plLJlV8l+rV+3ypAiE7DASAeW36q+fYfrR5LnC059Po3TVuNryLca0Z6wkMwOzoZBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T11:26:19.727952Z"},"content_sha256":"88cdc1f92a7305faf6d61103fb9aefb5a182ded27557b8ab5b0730d5af870c52","schema_version":"1.0","event_id":"sha256:88cdc1f92a7305faf6d61103fb9aefb5a182ded27557b8ab5b0730d5af870c52"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JWCMQKDMHRJDRKZZOXQQ5SANSU/bundle.json","state_url":"https://pith.science/pith/JWCMQKDMHRJDRKZZOXQQ5SANSU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JWCMQKDMHRJDRKZZOXQQ5SANSU/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":"2026-06-08T11:26:19Z","links":{"resolver":"https://pith.science/pith/JWCMQKDMHRJDRKZZOXQQ5SANSU","bundle":"https://pith.science/pith/JWCMQKDMHRJDRKZZOXQQ5SANSU/bundle.json","state":"https://pith.science/pith/JWCMQKDMHRJDRKZZOXQQ5SANSU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JWCMQKDMHRJDRKZZOXQQ5SANSU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:JWCMQKDMHRJDRKZZOXQQ5SANSU","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":"4af97b7cf1ddd242ffb1bd49c3b4a2ae522e3034e9f4f1e318b28eacf6397beb","cross_cats_sorted":["astro-ph.CO","gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-10-23T18:18:51Z","title_canon_sha256":"79e26038a32267d8ea2293d32fb8ed6029c89227fe6ae0b74ce4c3b6f59a6b68"},"schema_version":"1.0","source":{"id":"1410.6441","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1410.6441","created_at":"2026-05-18T01:41:40Z"},{"alias_kind":"arxiv_version","alias_value":"1410.6441v1","created_at":"2026-05-18T01:41:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1410.6441","created_at":"2026-05-18T01:41:40Z"},{"alias_kind":"pith_short_12","alias_value":"JWCMQKDMHRJD","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_16","alias_value":"JWCMQKDMHRJDRKZZ","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_8","alias_value":"JWCMQKDM","created_at":"2026-05-18T12:28:35Z"}],"graph_snapshots":[{"event_id":"sha256:88cdc1f92a7305faf6d61103fb9aefb5a182ded27557b8ab5b0730d5af870c52","target":"graph","created_at":"2026-05-18T01:41:40Z","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":"Gravitational wave background results from the superposition of gravitational waves generated from all sources across the Universe. Previous efforts on detecting such a background with pulsar timing arrays assume it is an isotropic Gaussian background with a power law spectrum. However, when the number of sources is limited, the background might be non-Gaussian or the spectrum might not be a power law. Correspondingly previous analysis may not work effectively. Here we use a method --- Bayesian Nonparametric Analysis --- to try to detect a generic gravitational wave background, which directly ","authors_text":"Xihao Deng","cross_cats":["astro-ph.CO","gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-10-23T18:18:51Z","title":"Searching for A Generic Gravitational Wave Background via Bayesian Nonparametric Analysis with Pulsar Timing Arrays"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1410.6441","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":"sha256:6b9cc39a637217d18a87e497eb8c34fa578afb782417dc379e4d707e4446254d","target":"record","created_at":"2026-05-18T01:41:40Z","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":"4af97b7cf1ddd242ffb1bd49c3b4a2ae522e3034e9f4f1e318b28eacf6397beb","cross_cats_sorted":["astro-ph.CO","gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-10-23T18:18:51Z","title_canon_sha256":"79e26038a32267d8ea2293d32fb8ed6029c89227fe6ae0b74ce4c3b6f59a6b68"},"schema_version":"1.0","source":{"id":"1410.6441","kind":"arxiv","version":1}},"canonical_sha256":"4d84c8286c3c5238ab3975e10ec80d952ad53ffce2334e7b044d8622b7f55ee1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4d84c8286c3c5238ab3975e10ec80d952ad53ffce2334e7b044d8622b7f55ee1","first_computed_at":"2026-05-18T01:41:40.424595Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:41:40.424595Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/wsHaJM/5Q3cu0qlTPFT0z84Cs760EsR+btnuV1Hgbd1u7Izb+P52Ij4rZbMPGGFFgzF6UlamnM1xlA5deNvDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:41:40.425142Z","signed_message":"canonical_sha256_bytes"},"source_id":"1410.6441","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6b9cc39a637217d18a87e497eb8c34fa578afb782417dc379e4d707e4446254d","sha256:88cdc1f92a7305faf6d61103fb9aefb5a182ded27557b8ab5b0730d5af870c52"],"state_sha256":"4ff67ede07521977665b84376121d958126ad24979d92f3ba692e9b7a1da27ea"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aUChTmQFOKxL6MzJcRdUHik8OM3GUlb89UaSWglT0Q4XtaLBdAu8BSub6pM8CU4LhrtHguzvRnNyBKoNnMk+AQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T11:26:19.730041Z","bundle_sha256":"700c6a0188f991edba23affe788285e1dbb0dd84a3db80b86a9ece0f34f489db"}}