{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:IVD4AAII4NOZCRNSWD4MHOWXP7","short_pith_number":"pith:IVD4AAII","canonical_record":{"source":{"id":"2006.04810","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2020-06-08T18:00:00Z","cross_cats_sorted":["astro-ph.GA","gr-qc"],"title_canon_sha256":"28269f1573589c48ac4fe357b6fe96ca17fca339ee85b94dd99ead77153d4f45","abstract_canon_sha256":"592cd79c3916d8bfc8cff63f9d82bd1d1c9b08428c66f3dbb0d0a909fa6f5723"},"schema_version":"1.0"},"canonical_sha256":"4547c00108e35d9145b2b0f8c3bad77fc0085cf79986fd56f82e1b145126b3bb","source":{"kind":"arxiv","id":"2006.04810","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2006.04810","created_at":"2026-07-05T01:44:39Z"},{"alias_kind":"arxiv_version","alias_value":"2006.04810v2","created_at":"2026-07-05T01:44:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2006.04810","created_at":"2026-07-05T01:44:39Z"},{"alias_kind":"pith_short_12","alias_value":"IVD4AAII4NOZ","created_at":"2026-07-05T01:44:39Z"},{"alias_kind":"pith_short_16","alias_value":"IVD4AAII4NOZCRNS","created_at":"2026-07-05T01:44:39Z"},{"alias_kind":"pith_short_8","alias_value":"IVD4AAII","created_at":"2026-07-05T01:44:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:IVD4AAII4NOZCRNSWD4MHOWXP7","target":"record","payload":{"canonical_record":{"source":{"id":"2006.04810","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2020-06-08T18:00:00Z","cross_cats_sorted":["astro-ph.GA","gr-qc"],"title_canon_sha256":"28269f1573589c48ac4fe357b6fe96ca17fca339ee85b94dd99ead77153d4f45","abstract_canon_sha256":"592cd79c3916d8bfc8cff63f9d82bd1d1c9b08428c66f3dbb0d0a909fa6f5723"},"schema_version":"1.0"},"canonical_sha256":"4547c00108e35d9145b2b0f8c3bad77fc0085cf79986fd56f82e1b145126b3bb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:44:39.737939Z","signature_b64":"wD4v3APkMKu5+wCzfliETThYMHB2EnT/xCZC1MxdLF9zYpXrG4PLQfMi5mXMBXb2uK0wehIxrpqWjj9wW3DKCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4547c00108e35d9145b2b0f8c3bad77fc0085cf79986fd56f82e1b145126b3bb","last_reissued_at":"2026-07-05T01:44:39.737500Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:44:39.737500Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2006.04810","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":"2026-07-05T01:44:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wIri3GG7fEcTy776uebFYeESQNR0t3yHbeszsxRyCUBmPoqHqEjsOrOuqcwIA2adasEWcLVlJOyBm1id0EhIBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T00:18:48.047094Z"},"content_sha256":"d7bca42446ff8ed76115403b821fab73c6a88572881f8d9629cc4b2e1082bcd5","schema_version":"1.0","event_id":"sha256:d7bca42446ff8ed76115403b821fab73c6a88572881f8d9629cc4b2e1082bcd5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:IVD4AAII4NOZCRNSWD4MHOWXP7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"From Bright Binaries To Bumpy Backgrounds: Mapping Realistic Gravitational Wave Skies With Pulsar-Timing Arrays","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA","gr-qc"],"primary_cat":"astro-ph.IM","authors_text":"Alberto Sesana, Rutger van Haasteren, Stephen R. Taylor","submitted_at":"2020-06-08T18:00:00Z","abstract_excerpt":"Within the next several years, pulsar-timing array programs will likely usher in the next era of gravitational-wave astronomy through the detection of a stochastic background of nanohertz-frequency gravitational waves, originating from a cosmological population of inspiraling supermassive binary black holes. While the source positions will likely be isotropic to a good approximation, the gravitational-wave angular power distribution will be anisotropic, with the most massive and/or nearby binaries producing signals that may resound above the background. We study such a realistic angular power "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2006.04810","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/2006.04810/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":"2026-07-05T01:44:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uS9nJFVWj1nJfv+9yP1qV7B2xWn2ysCNweH9hn8k1bZFGD1NXKwks2BN7LrxuChbrs0oJiuADmAJhEEQNy5mBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T00:18:48.047621Z"},"content_sha256":"693941c34c8912973cb701ad3bba555eacd1c3b8cac2516b504be2fe4933345e","schema_version":"1.0","event_id":"sha256:693941c34c8912973cb701ad3bba555eacd1c3b8cac2516b504be2fe4933345e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IVD4AAII4NOZCRNSWD4MHOWXP7/bundle.json","state_url":"https://pith.science/pith/IVD4AAII4NOZCRNSWD4MHOWXP7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IVD4AAII4NOZCRNSWD4MHOWXP7/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":"2026-08-11T00:18:48Z","links":{"resolver":"https://pith.science/pith/IVD4AAII4NOZCRNSWD4MHOWXP7","bundle":"https://pith.science/pith/IVD4AAII4NOZCRNSWD4MHOWXP7/bundle.json","state":"https://pith.science/pith/IVD4AAII4NOZCRNSWD4MHOWXP7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IVD4AAII4NOZCRNSWD4MHOWXP7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:IVD4AAII4NOZCRNSWD4MHOWXP7","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":"592cd79c3916d8bfc8cff63f9d82bd1d1c9b08428c66f3dbb0d0a909fa6f5723","cross_cats_sorted":["astro-ph.GA","gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2020-06-08T18:00:00Z","title_canon_sha256":"28269f1573589c48ac4fe357b6fe96ca17fca339ee85b94dd99ead77153d4f45"},"schema_version":"1.0","source":{"id":"2006.04810","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2006.04810","created_at":"2026-07-05T01:44:39Z"},{"alias_kind":"arxiv_version","alias_value":"2006.04810v2","created_at":"2026-07-05T01:44:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2006.04810","created_at":"2026-07-05T01:44:39Z"},{"alias_kind":"pith_short_12","alias_value":"IVD4AAII4NOZ","created_at":"2026-07-05T01:44:39Z"},{"alias_kind":"pith_short_16","alias_value":"IVD4AAII4NOZCRNS","created_at":"2026-07-05T01:44:39Z"},{"alias_kind":"pith_short_8","alias_value":"IVD4AAII","created_at":"2026-07-05T01:44:39Z"}],"graph_snapshots":[{"event_id":"sha256:693941c34c8912973cb701ad3bba555eacd1c3b8cac2516b504be2fe4933345e","target":"graph","created_at":"2026-07-05T01:44:39Z","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/2006.04810/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Within the next several years, pulsar-timing array programs will likely usher in the next era of gravitational-wave astronomy through the detection of a stochastic background of nanohertz-frequency gravitational waves, originating from a cosmological population of inspiraling supermassive binary black holes. While the source positions will likely be isotropic to a good approximation, the gravitational-wave angular power distribution will be anisotropic, with the most massive and/or nearby binaries producing signals that may resound above the background. We study such a realistic angular power ","authors_text":"Alberto Sesana, Rutger van Haasteren, Stephen R. Taylor","cross_cats":["astro-ph.GA","gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2020-06-08T18:00:00Z","title":"From Bright Binaries To Bumpy Backgrounds: Mapping Realistic Gravitational Wave Skies With Pulsar-Timing Arrays"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2006.04810","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:d7bca42446ff8ed76115403b821fab73c6a88572881f8d9629cc4b2e1082bcd5","target":"record","created_at":"2026-07-05T01:44:39Z","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":"592cd79c3916d8bfc8cff63f9d82bd1d1c9b08428c66f3dbb0d0a909fa6f5723","cross_cats_sorted":["astro-ph.GA","gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2020-06-08T18:00:00Z","title_canon_sha256":"28269f1573589c48ac4fe357b6fe96ca17fca339ee85b94dd99ead77153d4f45"},"schema_version":"1.0","source":{"id":"2006.04810","kind":"arxiv","version":2}},"canonical_sha256":"4547c00108e35d9145b2b0f8c3bad77fc0085cf79986fd56f82e1b145126b3bb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4547c00108e35d9145b2b0f8c3bad77fc0085cf79986fd56f82e1b145126b3bb","first_computed_at":"2026-07-05T01:44:39.737500Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:44:39.737500Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wD4v3APkMKu5+wCzfliETThYMHB2EnT/xCZC1MxdLF9zYpXrG4PLQfMi5mXMBXb2uK0wehIxrpqWjj9wW3DKCg==","signature_status":"signed_v1","signed_at":"2026-07-05T01:44:39.737939Z","signed_message":"canonical_sha256_bytes"},"source_id":"2006.04810","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d7bca42446ff8ed76115403b821fab73c6a88572881f8d9629cc4b2e1082bcd5","sha256:693941c34c8912973cb701ad3bba555eacd1c3b8cac2516b504be2fe4933345e"],"state_sha256":"6fff02ecf0d1301ef77ff23425f0b94009995ed513eddf283ce2225efb92be0b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CHODokhtJq8nUjTLpIVRwIf0P2rMKW/D2PT21SlYmhJ1ACIjSfHR6uBsMTcFVi9cc4eo8TALYL9rtxuEdNEeCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T00:18:48.052403Z","bundle_sha256":"5cc6c6649146628507d060146f1fe87ae99d877a919229c91fc59e80c590ec38"}}