{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1999:4RX72AXOURPUDMF3NIMFD3H55H","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":"1f9dce48513b70060ae6bd34ebcf47feed1845cfbcbfe6ca772323f8abbc0cdb","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1999-05-14T11:41:54Z","title_canon_sha256":"2f294ee963ed91fb9b640d952a27eda2b1babc8ead75b8d742b39c584e615fc8"},"schema_version":"1.0","source":{"id":"astro-ph/9905178","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9905178","created_at":"2026-07-04T14:16:42Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9905178v1","created_at":"2026-07-04T14:16:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9905178","created_at":"2026-07-04T14:16:42Z"},{"alias_kind":"pith_short_12","alias_value":"4RX72AXOURPU","created_at":"2026-07-04T14:16:42Z"},{"alias_kind":"pith_short_16","alias_value":"4RX72AXOURPUDMF3","created_at":"2026-07-04T14:16:42Z"},{"alias_kind":"pith_short_8","alias_value":"4RX72AXO","created_at":"2026-07-04T14:16:42Z"}],"graph_snapshots":[{"event_id":"sha256:0b353aa01449707f391158aee2e93ac6792cdc2c75ae3d4dd17ebda8ef51bf53","target":"graph","created_at":"2026-07-04T14:16:42Z","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/astro-ph/9905178/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The recent detection of high energy gamma-rays coming from supernova remnants and active galactic nuclei has revived interest in the diffusive shock acceleration of electrons. In the present paper we examine the basis of the so-called ``box'' model for particle acceleration and present a more physical version of it. Using this we determine simple criteria for the conditions under which ``pile-ups'' can occur in shock accelerated electron spectra subject to synchrotron or inverse Compton losses (the latter in the Thompson limit). An extension to include nonlinear effects is proposed.","authors_text":"Apostolos Mastichiadis, David Eichler, Luke O'C Drury, Peter Duffy","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1999-05-14T11:41:54Z","title":"On \"box\" models of shock acceleration and electron synchrotron spectra"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9905178","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":"sha256:480f8ecbdbdafc976e9091d3a4f40ae044c467505957f42b9125eb5e79228357","target":"record","created_at":"2026-07-04T14:16:42Z","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":"1f9dce48513b70060ae6bd34ebcf47feed1845cfbcbfe6ca772323f8abbc0cdb","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1999-05-14T11:41:54Z","title_canon_sha256":"2f294ee963ed91fb9b640d952a27eda2b1babc8ead75b8d742b39c584e615fc8"},"schema_version":"1.0","source":{"id":"astro-ph/9905178","kind":"arxiv","version":1}},"canonical_sha256":"e46ffd02eea45f41b0bb6a1851ecfde9f17495b6af05867948733780d8029592","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e46ffd02eea45f41b0bb6a1851ecfde9f17495b6af05867948733780d8029592","first_computed_at":"2026-07-04T14:16:42.772249Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T14:16:42.772249Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2XEuGMqTeK0UKJaSuyQ+cXk6FNqhmTWMS59cBhKb2vmzZcCMXtkVt7rpKdCsCo4Mi6LIeGo+KARNFmcpWbniCA==","signature_status":"signed_v1","signed_at":"2026-07-04T14:16:42.772684Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9905178","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:480f8ecbdbdafc976e9091d3a4f40ae044c467505957f42b9125eb5e79228357","sha256:0b353aa01449707f391158aee2e93ac6792cdc2c75ae3d4dd17ebda8ef51bf53"],"state_sha256":"7842876872795c531fc2bce5549f11a94c0a55d16fe9a2611f753ad0092fb2c1"}