{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:6SZLXM5DYYYPZHVZ3ARW33GBO2","short_pith_number":"pith:6SZLXM5D","canonical_record":{"source":{"id":"1010.4337","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-10-20T23:54:19Z","cross_cats_sorted":["astro-ph.CO","astro-ph.GA","gr-qc"],"title_canon_sha256":"95888cd16abe81e16c2b4aed3f0a1a0613768753604c10b223761f4e6d0e3542","abstract_canon_sha256":"2a7ebfc82e93c53b1b79c144b6d62e057ff12b564a7f988b058b278c95cec8b3"},"schema_version":"1.0"},"canonical_sha256":"f4b2bbb3a3c630fc9eb9d8236decc176a538002ed7196a9b1c5b1eea5907dbd5","source":{"kind":"arxiv","id":"1010.4337","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1010.4337","created_at":"2026-05-18T03:23:03Z"},{"alias_kind":"arxiv_version","alias_value":"1010.4337v2","created_at":"2026-05-18T03:23:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1010.4337","created_at":"2026-05-18T03:23:03Z"},{"alias_kind":"pith_short_12","alias_value":"6SZLXM5DYYYP","created_at":"2026-05-18T12:26:04Z"},{"alias_kind":"pith_short_16","alias_value":"6SZLXM5DYYYPZHVZ","created_at":"2026-05-18T12:26:04Z"},{"alias_kind":"pith_short_8","alias_value":"6SZLXM5D","created_at":"2026-05-18T12:26:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:6SZLXM5DYYYPZHVZ3ARW33GBO2","target":"record","payload":{"canonical_record":{"source":{"id":"1010.4337","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-10-20T23:54:19Z","cross_cats_sorted":["astro-ph.CO","astro-ph.GA","gr-qc"],"title_canon_sha256":"95888cd16abe81e16c2b4aed3f0a1a0613768753604c10b223761f4e6d0e3542","abstract_canon_sha256":"2a7ebfc82e93c53b1b79c144b6d62e057ff12b564a7f988b058b278c95cec8b3"},"schema_version":"1.0"},"canonical_sha256":"f4b2bbb3a3c630fc9eb9d8236decc176a538002ed7196a9b1c5b1eea5907dbd5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:23:03.489450Z","signature_b64":"Q6UyhoktjzGc6ZNgGwKfwH/MAVVCyMhW9QfExN+IwnZA5nl+wvhofBu4AKz9RYINtfhBbGHf7y/rOlC/PdgqCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f4b2bbb3a3c630fc9eb9d8236decc176a538002ed7196a9b1c5b1eea5907dbd5","last_reissued_at":"2026-05-18T03:23:03.489033Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:23:03.489033Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1010.4337","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":"2026-05-18T03:23:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4FKdtS4GOIblQ6LPSSxY60IOQKl+m2k8T+snOcXaVA87KTUuhyEvvcX3g571sUhSx1QzvOQaejob2EjoJXAiDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T00:32:42.249636Z"},"content_sha256":"c685e3c97ed760f324ba1f2c62d31bb1388a99208a5750ade0e973c6976814ee","schema_version":"1.0","event_id":"sha256:c685e3c97ed760f324ba1f2c62d31bb1388a99208a5750ade0e973c6976814ee"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:6SZLXM5DYYYPZHVZ3ARW33GBO2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Pulsar timing arrays as imaging gravitational wave telescopes: angular resolution and source (de)confusion","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","astro-ph.GA","gr-qc"],"primary_cat":"astro-ph.HE","authors_text":"Latham Boyle, Ue-Li Pen","submitted_at":"2010-10-20T23:54:19Z","abstract_excerpt":"Pulsar timing arrays (PTAs) will be sensitive to a finite number of gravitational wave (GW) \"point\" sources (e.g. supermassive black hole binaries). N quiet pulsars with accurately known distances d_{pulsar} can characterize up to 2N/7 distant chirping sources per frequency bin \\Delta f_{gw}=1/T, and localize them with \"diffraction limited\" precision \\delta\\theta \\gtrsim (1/SNR)(\\lambda_{gw}/d_{pulsar}). Even if the pulsar distances are poorly known, a PTA with F frequency bins can still characterize up to (2N/7)[1-(1/2F)] sources per bin, and the quasi-singular pattern of timing residuals in "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1010.4337","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":""},"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":"2026-05-18T03:23:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HUjggyPuP/XaRppJahm8DQY9RJg2fvTlEjPHeo4iXjgyaZjWhWugy/bGZUH15/vbEifIWC7LEzRR3IIgYb4mDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T00:32:42.250354Z"},"content_sha256":"5e225d1e11853c2a89d4a1bbbb293dc8a7047bf9d82140627622e230593b0d8f","schema_version":"1.0","event_id":"sha256:5e225d1e11853c2a89d4a1bbbb293dc8a7047bf9d82140627622e230593b0d8f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6SZLXM5DYYYPZHVZ3ARW33GBO2/bundle.json","state_url":"https://pith.science/pith/6SZLXM5DYYYPZHVZ3ARW33GBO2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6SZLXM5DYYYPZHVZ3ARW33GBO2/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":"2026-06-10T00:32:42Z","links":{"resolver":"https://pith.science/pith/6SZLXM5DYYYPZHVZ3ARW33GBO2","bundle":"https://pith.science/pith/6SZLXM5DYYYPZHVZ3ARW33GBO2/bundle.json","state":"https://pith.science/pith/6SZLXM5DYYYPZHVZ3ARW33GBO2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6SZLXM5DYYYPZHVZ3ARW33GBO2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:6SZLXM5DYYYPZHVZ3ARW33GBO2","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":"2a7ebfc82e93c53b1b79c144b6d62e057ff12b564a7f988b058b278c95cec8b3","cross_cats_sorted":["astro-ph.CO","astro-ph.GA","gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-10-20T23:54:19Z","title_canon_sha256":"95888cd16abe81e16c2b4aed3f0a1a0613768753604c10b223761f4e6d0e3542"},"schema_version":"1.0","source":{"id":"1010.4337","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1010.4337","created_at":"2026-05-18T03:23:03Z"},{"alias_kind":"arxiv_version","alias_value":"1010.4337v2","created_at":"2026-05-18T03:23:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1010.4337","created_at":"2026-05-18T03:23:03Z"},{"alias_kind":"pith_short_12","alias_value":"6SZLXM5DYYYP","created_at":"2026-05-18T12:26:04Z"},{"alias_kind":"pith_short_16","alias_value":"6SZLXM5DYYYPZHVZ","created_at":"2026-05-18T12:26:04Z"},{"alias_kind":"pith_short_8","alias_value":"6SZLXM5D","created_at":"2026-05-18T12:26:04Z"}],"graph_snapshots":[{"event_id":"sha256:5e225d1e11853c2a89d4a1bbbb293dc8a7047bf9d82140627622e230593b0d8f","target":"graph","created_at":"2026-05-18T03:23:03Z","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":"Pulsar timing arrays (PTAs) will be sensitive to a finite number of gravitational wave (GW) \"point\" sources (e.g. supermassive black hole binaries). N quiet pulsars with accurately known distances d_{pulsar} can characterize up to 2N/7 distant chirping sources per frequency bin \\Delta f_{gw}=1/T, and localize them with \"diffraction limited\" precision \\delta\\theta \\gtrsim (1/SNR)(\\lambda_{gw}/d_{pulsar}). Even if the pulsar distances are poorly known, a PTA with F frequency bins can still characterize up to (2N/7)[1-(1/2F)] sources per bin, and the quasi-singular pattern of timing residuals in ","authors_text":"Latham Boyle, Ue-Li Pen","cross_cats":["astro-ph.CO","astro-ph.GA","gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-10-20T23:54:19Z","title":"Pulsar timing arrays as imaging gravitational wave telescopes: angular resolution and source (de)confusion"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1010.4337","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:c685e3c97ed760f324ba1f2c62d31bb1388a99208a5750ade0e973c6976814ee","target":"record","created_at":"2026-05-18T03:23:03Z","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":"2a7ebfc82e93c53b1b79c144b6d62e057ff12b564a7f988b058b278c95cec8b3","cross_cats_sorted":["astro-ph.CO","astro-ph.GA","gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-10-20T23:54:19Z","title_canon_sha256":"95888cd16abe81e16c2b4aed3f0a1a0613768753604c10b223761f4e6d0e3542"},"schema_version":"1.0","source":{"id":"1010.4337","kind":"arxiv","version":2}},"canonical_sha256":"f4b2bbb3a3c630fc9eb9d8236decc176a538002ed7196a9b1c5b1eea5907dbd5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f4b2bbb3a3c630fc9eb9d8236decc176a538002ed7196a9b1c5b1eea5907dbd5","first_computed_at":"2026-05-18T03:23:03.489033Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:23:03.489033Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Q6UyhoktjzGc6ZNgGwKfwH/MAVVCyMhW9QfExN+IwnZA5nl+wvhofBu4AKz9RYINtfhBbGHf7y/rOlC/PdgqCA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:23:03.489450Z","signed_message":"canonical_sha256_bytes"},"source_id":"1010.4337","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c685e3c97ed760f324ba1f2c62d31bb1388a99208a5750ade0e973c6976814ee","sha256:5e225d1e11853c2a89d4a1bbbb293dc8a7047bf9d82140627622e230593b0d8f"],"state_sha256":"2444d52926b7b25aa726460d2c08c152b46d26c0a55b3a6c67af0bdf9b079b3a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nsyCa7rrBiY/vxHJ8NNgxQtZGZ5mWgtTjbEiJToYg08F7/6CdRw4a+zYBdDo47Up13NYOis2wPGEidpyA73eDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-10T00:32:42.255066Z","bundle_sha256":"4ad695e27a24d75f7f66ac6690d1fe6a96a67f42e959f7f61162b6f9f9c49b48"}}