{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:VURZOI7BV45JQXLVZ24SWRHIQL","short_pith_number":"pith:VURZOI7B","canonical_record":{"source":{"id":"1907.13321","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-07-31T06:19:57Z","cross_cats_sorted":["physics.space-ph"],"title_canon_sha256":"221fbf4558fca7d41f24f00244777b592280f4740540ea2294ec460921e235b2","abstract_canon_sha256":"7cb37f74a24b949ac7ca86f2902f70b845a63b2f78bde88fb07feb18c39242be"},"schema_version":"1.0"},"canonical_sha256":"ad239723e1af3a985d75ceb92b44e882fa013224aebb5c49c7a54fafbf3f1421","source":{"kind":"arxiv","id":"1907.13321","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.13321","created_at":"2026-07-05T00:06:52Z"},{"alias_kind":"arxiv_version","alias_value":"1907.13321v1","created_at":"2026-07-05T00:06:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.13321","created_at":"2026-07-05T00:06:52Z"},{"alias_kind":"pith_short_12","alias_value":"VURZOI7BV45J","created_at":"2026-07-05T00:06:52Z"},{"alias_kind":"pith_short_16","alias_value":"VURZOI7BV45JQXLV","created_at":"2026-07-05T00:06:52Z"},{"alias_kind":"pith_short_8","alias_value":"VURZOI7B","created_at":"2026-07-05T00:06:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:VURZOI7BV45JQXLVZ24SWRHIQL","target":"record","payload":{"canonical_record":{"source":{"id":"1907.13321","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-07-31T06:19:57Z","cross_cats_sorted":["physics.space-ph"],"title_canon_sha256":"221fbf4558fca7d41f24f00244777b592280f4740540ea2294ec460921e235b2","abstract_canon_sha256":"7cb37f74a24b949ac7ca86f2902f70b845a63b2f78bde88fb07feb18c39242be"},"schema_version":"1.0"},"canonical_sha256":"ad239723e1af3a985d75ceb92b44e882fa013224aebb5c49c7a54fafbf3f1421","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:06:52.036905Z","signature_b64":"uDK9ZbnsRvKuSGyXEB7b5vCR1UC0GafF6R9mKPjbMPbIemoSbn9JGtRiAV4lO9gH06fOwwRV2LsWugOwwvpYAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ad239723e1af3a985d75ceb92b44e882fa013224aebb5c49c7a54fafbf3f1421","last_reissued_at":"2026-07-05T00:06:52.036443Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:06:52.036443Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1907.13321","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":"2026-07-05T00:06:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cagm5b2l6sMoXWXWFgCiwOCq02vKFPViSNtCjW5xwdmrqSE9f8/mH8/4ioJA8fGzWGk0vWsIX7m+IFxhEiMiAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T16:09:46.234486Z"},"content_sha256":"0dedf294bb12ef0a60416afd3c3dde084a8ff0b91098968f36204f04d89bfea2","schema_version":"1.0","event_id":"sha256:0dedf294bb12ef0a60416afd3c3dde084a8ff0b91098968f36204f04d89bfea2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:VURZOI7BV45JQXLVZ24SWRHIQL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Acceleration of Energetic Particles at Coronal Shocks and Emergence of a Double Power Law Feature in Particle Energy Spectra","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.space-ph"],"primary_cat":"astro-ph.SR","authors_text":"Fan Guo, Joe Giacalone, Xiangliang Kong, Yao Chen","submitted_at":"2019-07-31T06:19:57Z","abstract_excerpt":"We present numerical modelling of particle acceleration at coronal shocks propagating through a streamer-like magnetic field by solving the Parker transport equation with spatial diffusion both along and across the magnetic field. We show that the location on the shock where the high-energy particle intensity is the largest, depends on the energy of the particles and on time. The acceleration of particles to more than 100 MeV mainly occurs in the shock-streamer interaction region, due to perpendicular shock geometry and the trapping effect of closed magnetic fields. A comparison of the particl"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.13321","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/1907.13321/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":"2026-07-05T00:06:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qDgOl3/+ZkW4q6jfyKyGP8/sHN0w3VSCTR/3PbSRr706Gcmxqnk5POuPIsL3zGBcArv9s06irlR8ASZBajM/Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T16:09:46.235454Z"},"content_sha256":"f93e7cc30aa8a225b24a5122f530917d94fed73525b777b0b99f4c329a237e67","schema_version":"1.0","event_id":"sha256:f93e7cc30aa8a225b24a5122f530917d94fed73525b777b0b99f4c329a237e67"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VURZOI7BV45JQXLVZ24SWRHIQL/bundle.json","state_url":"https://pith.science/pith/VURZOI7BV45JQXLVZ24SWRHIQL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VURZOI7BV45JQXLVZ24SWRHIQL/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":"2026-08-20T16:09:46Z","links":{"resolver":"https://pith.science/pith/VURZOI7BV45JQXLVZ24SWRHIQL","bundle":"https://pith.science/pith/VURZOI7BV45JQXLVZ24SWRHIQL/bundle.json","state":"https://pith.science/pith/VURZOI7BV45JQXLVZ24SWRHIQL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VURZOI7BV45JQXLVZ24SWRHIQL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:VURZOI7BV45JQXLVZ24SWRHIQL","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":"7cb37f74a24b949ac7ca86f2902f70b845a63b2f78bde88fb07feb18c39242be","cross_cats_sorted":["physics.space-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-07-31T06:19:57Z","title_canon_sha256":"221fbf4558fca7d41f24f00244777b592280f4740540ea2294ec460921e235b2"},"schema_version":"1.0","source":{"id":"1907.13321","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.13321","created_at":"2026-07-05T00:06:52Z"},{"alias_kind":"arxiv_version","alias_value":"1907.13321v1","created_at":"2026-07-05T00:06:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.13321","created_at":"2026-07-05T00:06:52Z"},{"alias_kind":"pith_short_12","alias_value":"VURZOI7BV45J","created_at":"2026-07-05T00:06:52Z"},{"alias_kind":"pith_short_16","alias_value":"VURZOI7BV45JQXLV","created_at":"2026-07-05T00:06:52Z"},{"alias_kind":"pith_short_8","alias_value":"VURZOI7B","created_at":"2026-07-05T00:06:52Z"}],"graph_snapshots":[{"event_id":"sha256:f93e7cc30aa8a225b24a5122f530917d94fed73525b777b0b99f4c329a237e67","target":"graph","created_at":"2026-07-05T00:06:52Z","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/1907.13321/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present numerical modelling of particle acceleration at coronal shocks propagating through a streamer-like magnetic field by solving the Parker transport equation with spatial diffusion both along and across the magnetic field. We show that the location on the shock where the high-energy particle intensity is the largest, depends on the energy of the particles and on time. The acceleration of particles to more than 100 MeV mainly occurs in the shock-streamer interaction region, due to perpendicular shock geometry and the trapping effect of closed magnetic fields. A comparison of the particl","authors_text":"Fan Guo, Joe Giacalone, Xiangliang Kong, Yao Chen","cross_cats":["physics.space-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-07-31T06:19:57Z","title":"The Acceleration of Energetic Particles at Coronal Shocks and Emergence of a Double Power Law Feature in Particle Energy Spectra"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.13321","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":"sha256:0dedf294bb12ef0a60416afd3c3dde084a8ff0b91098968f36204f04d89bfea2","target":"record","created_at":"2026-07-05T00:06:52Z","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":"7cb37f74a24b949ac7ca86f2902f70b845a63b2f78bde88fb07feb18c39242be","cross_cats_sorted":["physics.space-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-07-31T06:19:57Z","title_canon_sha256":"221fbf4558fca7d41f24f00244777b592280f4740540ea2294ec460921e235b2"},"schema_version":"1.0","source":{"id":"1907.13321","kind":"arxiv","version":1}},"canonical_sha256":"ad239723e1af3a985d75ceb92b44e882fa013224aebb5c49c7a54fafbf3f1421","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ad239723e1af3a985d75ceb92b44e882fa013224aebb5c49c7a54fafbf3f1421","first_computed_at":"2026-07-05T00:06:52.036443Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:06:52.036443Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uDK9ZbnsRvKuSGyXEB7b5vCR1UC0GafF6R9mKPjbMPbIemoSbn9JGtRiAV4lO9gH06fOwwRV2LsWugOwwvpYAg==","signature_status":"signed_v1","signed_at":"2026-07-05T00:06:52.036905Z","signed_message":"canonical_sha256_bytes"},"source_id":"1907.13321","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0dedf294bb12ef0a60416afd3c3dde084a8ff0b91098968f36204f04d89bfea2","sha256:f93e7cc30aa8a225b24a5122f530917d94fed73525b777b0b99f4c329a237e67"],"state_sha256":"a86aaf3943bfde04c6871ee109150bb01c39c055789d2c69ef34015be3cff6d0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w9KRcTSR31UZ7rAbaXX8PkFvjSj8ZMnPofdfjokyCAxw/8WHzF6MLx9DWlGZuA5JK6J8/YvAkEcPttpdrt/gBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-20T16:09:46.241549Z","bundle_sha256":"94068df51889ae863761d00393e5937d7cd755396c0dab46297e60c4129de250"}}