{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:LPFY3RQJS42NJUNABI5HDJAHE4","short_pith_number":"pith:LPFY3RQJ","canonical_record":{"source":{"id":"1805.07983","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-05-21T10:57:46Z","cross_cats_sorted":[],"title_canon_sha256":"4d103f3fa17754e6cbdc06cbb997595128f01274b0073d50440f6464c1d351e0","abstract_canon_sha256":"c9de633b7a12d2b67ff62b56c42f9ae99dcb1fcc6d636643cdc291f68d29d9b0"},"schema_version":"1.0"},"canonical_sha256":"5bcb8dc6099734d4d1a00a3a71a40727091513002d3e2e929b3dcacdb63fb4aa","source":{"kind":"arxiv","id":"1805.07983","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.07983","created_at":"2026-05-18T00:08:06Z"},{"alias_kind":"arxiv_version","alias_value":"1805.07983v2","created_at":"2026-05-18T00:08:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.07983","created_at":"2026-05-18T00:08:06Z"},{"alias_kind":"pith_short_12","alias_value":"LPFY3RQJS42N","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_16","alias_value":"LPFY3RQJS42NJUNA","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_8","alias_value":"LPFY3RQJ","created_at":"2026-05-18T12:32:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:LPFY3RQJS42NJUNABI5HDJAHE4","target":"record","payload":{"canonical_record":{"source":{"id":"1805.07983","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-05-21T10:57:46Z","cross_cats_sorted":[],"title_canon_sha256":"4d103f3fa17754e6cbdc06cbb997595128f01274b0073d50440f6464c1d351e0","abstract_canon_sha256":"c9de633b7a12d2b67ff62b56c42f9ae99dcb1fcc6d636643cdc291f68d29d9b0"},"schema_version":"1.0"},"canonical_sha256":"5bcb8dc6099734d4d1a00a3a71a40727091513002d3e2e929b3dcacdb63fb4aa","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:08:06.885808Z","signature_b64":"RrGa+Iw1vVunkSRQ6iQf81P7ribH5/TIcT9XeRnJUXv2U0lpYNAvEI16DVCpGa661DfqfuYQugJyp5iJYzZqBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5bcb8dc6099734d4d1a00a3a71a40727091513002d3e2e929b3dcacdb63fb4aa","last_reissued_at":"2026-05-18T00:08:06.884549Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:08:06.884549Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1805.07983","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":"2026-05-18T00:08:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Z21ODH6IBCtoKq8/ENlKtOxgSK/DoEtaaPOwdTZLzLcoh11F7OSLOhlCrNZcoXMW5rVi6Z3Clpruuw/+dxCHAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T05:24:29.973310Z"},"content_sha256":"737d83192d6def1638efea63edab38fbd1dc56f86123c2eb7f9a3b7465333c5d","schema_version":"1.0","event_id":"sha256:737d83192d6def1638efea63edab38fbd1dc56f86123c2eb7f9a3b7465333c5d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:LPFY3RQJS42NJUNABI5HDJAHE4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Uncertainty in Measurements of the Distances of Scattering Screens in Pulsar Observations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"E. N. Fadeev","submitted_at":"2018-05-21T10:57:46Z","abstract_excerpt":"In our previous paper (Popov et al. (2016)) we investigated properties of the ionized interstellar medium in the direction of three distant pulsars: B1641-45, B1749-28, and B1933+16. We found that uniformly distributed scattering material cannot explain measured temporal and angular broadening. We applied a model for a thin scattering screen and found the distances to the scattering screens in all directions. In this paper we consider more complicated models of scattering material distribution, such as models containing both uniformly distributed medium and thin screen. Based on these models w"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.07983","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":"2026-05-18T00:08:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qzPh4d1DgLuToDJGZzTWXd8zMj912io8YjI8f/GZjldQa4y7UwUT9L7PMH39rMYwGgd06uwfkhE+Eh/YMRHBDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T05:24:29.974075Z"},"content_sha256":"7690367294bfeafd472aa2ad09e11d170b6cf32b47b5cf9a13c23a064ea4131a","schema_version":"1.0","event_id":"sha256:7690367294bfeafd472aa2ad09e11d170b6cf32b47b5cf9a13c23a064ea4131a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LPFY3RQJS42NJUNABI5HDJAHE4/bundle.json","state_url":"https://pith.science/pith/LPFY3RQJS42NJUNABI5HDJAHE4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LPFY3RQJS42NJUNABI5HDJAHE4/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":"2026-06-06T05:24:29Z","links":{"resolver":"https://pith.science/pith/LPFY3RQJS42NJUNABI5HDJAHE4","bundle":"https://pith.science/pith/LPFY3RQJS42NJUNABI5HDJAHE4/bundle.json","state":"https://pith.science/pith/LPFY3RQJS42NJUNABI5HDJAHE4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LPFY3RQJS42NJUNABI5HDJAHE4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:LPFY3RQJS42NJUNABI5HDJAHE4","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":"c9de633b7a12d2b67ff62b56c42f9ae99dcb1fcc6d636643cdc291f68d29d9b0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-05-21T10:57:46Z","title_canon_sha256":"4d103f3fa17754e6cbdc06cbb997595128f01274b0073d50440f6464c1d351e0"},"schema_version":"1.0","source":{"id":"1805.07983","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.07983","created_at":"2026-05-18T00:08:06Z"},{"alias_kind":"arxiv_version","alias_value":"1805.07983v2","created_at":"2026-05-18T00:08:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.07983","created_at":"2026-05-18T00:08:06Z"},{"alias_kind":"pith_short_12","alias_value":"LPFY3RQJS42N","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_16","alias_value":"LPFY3RQJS42NJUNA","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_8","alias_value":"LPFY3RQJ","created_at":"2026-05-18T12:32:37Z"}],"graph_snapshots":[{"event_id":"sha256:7690367294bfeafd472aa2ad09e11d170b6cf32b47b5cf9a13c23a064ea4131a","target":"graph","created_at":"2026-05-18T00:08:06Z","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":"In our previous paper (Popov et al. (2016)) we investigated properties of the ionized interstellar medium in the direction of three distant pulsars: B1641-45, B1749-28, and B1933+16. We found that uniformly distributed scattering material cannot explain measured temporal and angular broadening. We applied a model for a thin scattering screen and found the distances to the scattering screens in all directions. In this paper we consider more complicated models of scattering material distribution, such as models containing both uniformly distributed medium and thin screen. Based on these models w","authors_text":"E. N. Fadeev","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-05-21T10:57:46Z","title":"Uncertainty in Measurements of the Distances of Scattering Screens in Pulsar Observations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.07983","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":"sha256:737d83192d6def1638efea63edab38fbd1dc56f86123c2eb7f9a3b7465333c5d","target":"record","created_at":"2026-05-18T00:08:06Z","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":"c9de633b7a12d2b67ff62b56c42f9ae99dcb1fcc6d636643cdc291f68d29d9b0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-05-21T10:57:46Z","title_canon_sha256":"4d103f3fa17754e6cbdc06cbb997595128f01274b0073d50440f6464c1d351e0"},"schema_version":"1.0","source":{"id":"1805.07983","kind":"arxiv","version":2}},"canonical_sha256":"5bcb8dc6099734d4d1a00a3a71a40727091513002d3e2e929b3dcacdb63fb4aa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5bcb8dc6099734d4d1a00a3a71a40727091513002d3e2e929b3dcacdb63fb4aa","first_computed_at":"2026-05-18T00:08:06.884549Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:08:06.884549Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RrGa+Iw1vVunkSRQ6iQf81P7ribH5/TIcT9XeRnJUXv2U0lpYNAvEI16DVCpGa661DfqfuYQugJyp5iJYzZqBw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:08:06.885808Z","signed_message":"canonical_sha256_bytes"},"source_id":"1805.07983","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:737d83192d6def1638efea63edab38fbd1dc56f86123c2eb7f9a3b7465333c5d","sha256:7690367294bfeafd472aa2ad09e11d170b6cf32b47b5cf9a13c23a064ea4131a"],"state_sha256":"332a6676e8678c3ff43ecf534065862373920b2607c78f19bbc32bb97016dc0a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ktd6nh5CbUm61+CfDNf/aq0wOeghkGv6xZ4gYwRIv4aKsIrqJ3de4GHwxUTcVTGlIO5Ad9QZkFCNJPU01zOTDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T05:24:29.978718Z","bundle_sha256":"595b738c788779fd50cf4c4f255eab5755de2c6bfb3650832ed63130226f268f"}}