{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:I74JT3ZT5DMNY52QYGGZELZQMS","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":"a879b7cd6e0a35bca9e0becb3127c23ff114bc6dc263ea303aad90c0419a0614","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-09-27T14:40:43Z","title_canon_sha256":"328c5013c0a95f628392f6737d0825d44e8d285859e0d251cf356ec09d965d4e"},"schema_version":"1.0","source":{"id":"1809.10683","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.10683","created_at":"2026-05-18T00:04:35Z"},{"alias_kind":"arxiv_version","alias_value":"1809.10683v1","created_at":"2026-05-18T00:04:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.10683","created_at":"2026-05-18T00:04:35Z"},{"alias_kind":"pith_short_12","alias_value":"I74JT3ZT5DMN","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"I74JT3ZT5DMNY52Q","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"I74JT3ZT","created_at":"2026-05-18T12:32:28Z"}],"graph_snapshots":[{"event_id":"sha256:2922d047b8c6682a8886f0a3972a598a5ffc5fba0068a66c9393305e1b58681c","target":"graph","created_at":"2026-05-18T00:04:35Z","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":"We model the morphology and spectrum of a pulsar wind nebula using a leptonic emission code. This code is a time-dependent, multi-zone model that investigates the changes in the particle spectrum as they traverse the nebula. We calculate the synchrotron and inverse Compton emissivities at different positions in the nebula, obtaining the surface brightness versus the radius, and also the size of the nebula as a function of energy. We incorporate a time and spatially-dependent $B$-field, spatially-dependent bulk particle speed implying convection and adiabatic losses, diffusion, as well as radia","authors_text":"Carlo van Rensburg, Christo Venter P. Paulus Kruger","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-09-27T14:40:43Z","title":"Simultaneous Spectral and Spatial Modelling of Young Pulsar Wind Nebulae"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.10683","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":"sha256:0bbc39664b9cb3d39facbd9285e3eedb60eba912b4cfd82423ebc4d4140efad4","target":"record","created_at":"2026-05-18T00:04:35Z","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":"a879b7cd6e0a35bca9e0becb3127c23ff114bc6dc263ea303aad90c0419a0614","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-09-27T14:40:43Z","title_canon_sha256":"328c5013c0a95f628392f6737d0825d44e8d285859e0d251cf356ec09d965d4e"},"schema_version":"1.0","source":{"id":"1809.10683","kind":"arxiv","version":1}},"canonical_sha256":"47f899ef33e8d8dc7750c18d922f30649e6ca53242e84cfd14b5379837afe87c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"47f899ef33e8d8dc7750c18d922f30649e6ca53242e84cfd14b5379837afe87c","first_computed_at":"2026-05-18T00:04:35.273757Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:04:35.273757Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dmJA4nWeNimCL5tNiTUBwPgas7Rtw2JEf76htxUME6iAZGmBBJZGZHYw9BHyH/aaoOz9GYlLNtWhsDSVLmPuAw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:04:35.274143Z","signed_message":"canonical_sha256_bytes"},"source_id":"1809.10683","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0bbc39664b9cb3d39facbd9285e3eedb60eba912b4cfd82423ebc4d4140efad4","sha256:2922d047b8c6682a8886f0a3972a598a5ffc5fba0068a66c9393305e1b58681c"],"state_sha256":"b2d4784718ab690283a4252c249e0c934008e113f388ec6e6ce0fa7fb20414da"}