{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:MOJYYTE6I4VGBD3IE5PUHII4KP","short_pith_number":"pith:MOJYYTE6","canonical_record":{"source":{"id":"2201.06537","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-01-17T17:32:16Z","cross_cats_sorted":[],"title_canon_sha256":"3eafc902c67406ab5b09790972aed2c492a66db6ca713a5457c70dbd0dc31c26","abstract_canon_sha256":"d89eb48a1509389149a3eb03538c7b1a7c331b5e1ca666739adf6054ea71df21"},"schema_version":"1.0"},"canonical_sha256":"63938c4c9e472a608f68275f43a11c53d68186a8026b9fccc0dd65783f7235ad","source":{"kind":"arxiv","id":"2201.06537","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2201.06537","created_at":"2026-07-05T04:11:29Z"},{"alias_kind":"arxiv_version","alias_value":"2201.06537v1","created_at":"2026-07-05T04:11:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2201.06537","created_at":"2026-07-05T04:11:29Z"},{"alias_kind":"pith_short_12","alias_value":"MOJYYTE6I4VG","created_at":"2026-07-05T04:11:29Z"},{"alias_kind":"pith_short_16","alias_value":"MOJYYTE6I4VGBD3I","created_at":"2026-07-05T04:11:29Z"},{"alias_kind":"pith_short_8","alias_value":"MOJYYTE6","created_at":"2026-07-05T04:11:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:MOJYYTE6I4VGBD3IE5PUHII4KP","target":"record","payload":{"canonical_record":{"source":{"id":"2201.06537","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-01-17T17:32:16Z","cross_cats_sorted":[],"title_canon_sha256":"3eafc902c67406ab5b09790972aed2c492a66db6ca713a5457c70dbd0dc31c26","abstract_canon_sha256":"d89eb48a1509389149a3eb03538c7b1a7c331b5e1ca666739adf6054ea71df21"},"schema_version":"1.0"},"canonical_sha256":"63938c4c9e472a608f68275f43a11c53d68186a8026b9fccc0dd65783f7235ad","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:11:29.949923Z","signature_b64":"+90CLTerFWOdf9Rlli3OliFBT4MSMelGvufR7vDqIG8kBKyu1eUt7xe/PGZQwTL7FBqZ3G8JGSnNrpXN3Cg5Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"63938c4c9e472a608f68275f43a11c53d68186a8026b9fccc0dd65783f7235ad","last_reissued_at":"2026-07-05T04:11:29.949580Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:11:29.949580Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2201.06537","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":"2026-07-05T04:11:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"O/jgX/ZPtdY4wZmRXVChifiWADbNVfkJDRrY7/6bJVxNPfhpjygPLmnDn4q4Te/vMWUaqhSa2HgwfhmaZyyKBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T16:34:07.685547Z"},"content_sha256":"1ed3474ddd422a66a07ad8225af69deb14236355e80f1f83df6e1613fc2a43c9","schema_version":"1.0","event_id":"sha256:1ed3474ddd422a66a07ad8225af69deb14236355e80f1f83df6e1613fc2a43c9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:MOJYYTE6I4VGBD3IE5PUHII4KP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Intensity and Polarization Characteristics of Extended Neutron Star Surface Regions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"George Younes, Joseph A. Barchas, Kun Hu, Matthew G. Baring","submitted_at":"2022-01-17T17:32:16Z","abstract_excerpt":"The surfaces of neutron stars are sources of strongly polarized soft X rays due to the presence of strong magnetic fields. Radiative transfer mediated by electron scattering and free-free absorption is central to defining local surface anisotropy and polarization signatures. Scattering transport is strongly influenced by the complicated interplay between linear and circular polarizations. This complexity has been captured in a sophisticated magnetic Thomson scattering simulation we recently developed to model the outer layers of fully-ionized atmospheres in such compact objects, heretofore foc"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2201.06537","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2201.06537/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":"2026-07-05T04:11:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"F2X0gQHbtbLHDkvgexM+nqk4bJpWQuqBSpE6yAAvmZoQXFYXic1BFJsK7lWleTOXDAdotJq+5asPWTfGmvD3DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T16:34:07.686625Z"},"content_sha256":"c7da00168c06498d307032be18b93c4e0a9ba2e3357ce7177c33a92554def69f","schema_version":"1.0","event_id":"sha256:c7da00168c06498d307032be18b93c4e0a9ba2e3357ce7177c33a92554def69f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MOJYYTE6I4VGBD3IE5PUHII4KP/bundle.json","state_url":"https://pith.science/pith/MOJYYTE6I4VGBD3IE5PUHII4KP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MOJYYTE6I4VGBD3IE5PUHII4KP/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":"2026-08-18T16:34:07Z","links":{"resolver":"https://pith.science/pith/MOJYYTE6I4VGBD3IE5PUHII4KP","bundle":"https://pith.science/pith/MOJYYTE6I4VGBD3IE5PUHII4KP/bundle.json","state":"https://pith.science/pith/MOJYYTE6I4VGBD3IE5PUHII4KP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MOJYYTE6I4VGBD3IE5PUHII4KP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:MOJYYTE6I4VGBD3IE5PUHII4KP","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":"d89eb48a1509389149a3eb03538c7b1a7c331b5e1ca666739adf6054ea71df21","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-01-17T17:32:16Z","title_canon_sha256":"3eafc902c67406ab5b09790972aed2c492a66db6ca713a5457c70dbd0dc31c26"},"schema_version":"1.0","source":{"id":"2201.06537","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2201.06537","created_at":"2026-07-05T04:11:29Z"},{"alias_kind":"arxiv_version","alias_value":"2201.06537v1","created_at":"2026-07-05T04:11:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2201.06537","created_at":"2026-07-05T04:11:29Z"},{"alias_kind":"pith_short_12","alias_value":"MOJYYTE6I4VG","created_at":"2026-07-05T04:11:29Z"},{"alias_kind":"pith_short_16","alias_value":"MOJYYTE6I4VGBD3I","created_at":"2026-07-05T04:11:29Z"},{"alias_kind":"pith_short_8","alias_value":"MOJYYTE6","created_at":"2026-07-05T04:11:29Z"}],"graph_snapshots":[{"event_id":"sha256:c7da00168c06498d307032be18b93c4e0a9ba2e3357ce7177c33a92554def69f","target":"graph","created_at":"2026-07-05T04:11:29Z","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/2201.06537/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The surfaces of neutron stars are sources of strongly polarized soft X rays due to the presence of strong magnetic fields. Radiative transfer mediated by electron scattering and free-free absorption is central to defining local surface anisotropy and polarization signatures. Scattering transport is strongly influenced by the complicated interplay between linear and circular polarizations. This complexity has been captured in a sophisticated magnetic Thomson scattering simulation we recently developed to model the outer layers of fully-ionized atmospheres in such compact objects, heretofore foc","authors_text":"George Younes, Joseph A. Barchas, Kun Hu, Matthew G. Baring","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-01-17T17:32:16Z","title":"Intensity and Polarization Characteristics of Extended Neutron Star Surface Regions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2201.06537","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":"sha256:1ed3474ddd422a66a07ad8225af69deb14236355e80f1f83df6e1613fc2a43c9","target":"record","created_at":"2026-07-05T04:11:29Z","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":"d89eb48a1509389149a3eb03538c7b1a7c331b5e1ca666739adf6054ea71df21","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2022-01-17T17:32:16Z","title_canon_sha256":"3eafc902c67406ab5b09790972aed2c492a66db6ca713a5457c70dbd0dc31c26"},"schema_version":"1.0","source":{"id":"2201.06537","kind":"arxiv","version":1}},"canonical_sha256":"63938c4c9e472a608f68275f43a11c53d68186a8026b9fccc0dd65783f7235ad","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"63938c4c9e472a608f68275f43a11c53d68186a8026b9fccc0dd65783f7235ad","first_computed_at":"2026-07-05T04:11:29.949580Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:11:29.949580Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+90CLTerFWOdf9Rlli3OliFBT4MSMelGvufR7vDqIG8kBKyu1eUt7xe/PGZQwTL7FBqZ3G8JGSnNrpXN3Cg5Ag==","signature_status":"signed_v1","signed_at":"2026-07-05T04:11:29.949923Z","signed_message":"canonical_sha256_bytes"},"source_id":"2201.06537","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1ed3474ddd422a66a07ad8225af69deb14236355e80f1f83df6e1613fc2a43c9","sha256:c7da00168c06498d307032be18b93c4e0a9ba2e3357ce7177c33a92554def69f"],"state_sha256":"1121bc3d69f174a6f354a5557caf97d899b77740a1be7a43566ba666f0acf4e5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LvcUcV0G0U6+z2MtpaFXpYzI6Nmm+/e3GQgUD2z99Ysz2qLNIyDV65vDKPUH9Qn8ikL3kXY1nQqnc63qQYg0Dw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-18T16:34:07.693675Z","bundle_sha256":"e342c70488c23101e0f797c6a15ab1a38f1ebea7b4f1f4866b89f85c053bf48a"}}