{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2013:5VR5QTWZBSK6QXN36OEM3FDSG2","short_pith_number":"pith:5VR5QTWZ","schema_version":"1.0","canonical_sha256":"ed63d84ed90c95e85dbbf388cd947236aad1edf2980a8536eb9399799926ea5d","source":{"kind":"arxiv","id":"1303.5917","version":1},"attestation_state":"computed","paper":{"title":"On the spectral hardening at ~> 300 keV in solar flares","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"Gang. Li, Gary Zank, Xiangliang Kong, Yao Chen","submitted_at":"2013-03-24T06:54:56Z","abstract_excerpt":"It has been noted for a long time that the spectra of observed continuum emissions in many solar flares are consistent with double power laws with a hardening at energies $\\sim > $ 300 keV. It is now largely believed that at least in electron-dominated events the hardening in photon spectrum reflects an intrinsic hardening in the source electron spectrum. In this paper, we point out that a power law spectrum of electron with a hardening at high energies can be explained by diffusive shock acceleration of electrons at a termination shock with a finite width. Our suggestion is based on an early "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1303.5917","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-03-24T06:54:56Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"c67cca299a53e08dd01e0fd1fc2beb2407ee1c73af44a7d3b4c04a1417147197","abstract_canon_sha256":"1fd68dc10f763a2361875925c803750b0399bdbd9cd1e488c6e274d861aba929"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:50:59.261856Z","signature_b64":"vT67pU8DMulW/XS+4lkeGjPi/zrXvThzqKmD9WMfiU1tXX7ANo7V13KxD7j6TUk5BjRLQWORsnTnVFqYFOv+Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ed63d84ed90c95e85dbbf388cd947236aad1edf2980a8536eb9399799926ea5d","last_reissued_at":"2026-05-18T01:50:59.261475Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:50:59.261475Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"On the spectral hardening at ~> 300 keV in solar flares","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"Gang. Li, Gary Zank, Xiangliang Kong, Yao Chen","submitted_at":"2013-03-24T06:54:56Z","abstract_excerpt":"It has been noted for a long time that the spectra of observed continuum emissions in many solar flares are consistent with double power laws with a hardening at energies $\\sim > $ 300 keV. It is now largely believed that at least in electron-dominated events the hardening in photon spectrum reflects an intrinsic hardening in the source electron spectrum. In this paper, we point out that a power law spectrum of electron with a hardening at high energies can be explained by diffusive shock acceleration of electrons at a termination shock with a finite width. Our suggestion is based on an early "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.5917","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":""},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1303.5917","created_at":"2026-05-18T01:50:59.261535+00:00"},{"alias_kind":"arxiv_version","alias_value":"1303.5917v1","created_at":"2026-05-18T01:50:59.261535+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1303.5917","created_at":"2026-05-18T01:50:59.261535+00:00"},{"alias_kind":"pith_short_12","alias_value":"5VR5QTWZBSK6","created_at":"2026-05-18T12:27:34.582898+00:00"},{"alias_kind":"pith_short_16","alias_value":"5VR5QTWZBSK6QXN3","created_at":"2026-05-18T12:27:34.582898+00:00"},{"alias_kind":"pith_short_8","alias_value":"5VR5QTWZ","created_at":"2026-05-18T12:27:34.582898+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/5VR5QTWZBSK6QXN36OEM3FDSG2","json":"https://pith.science/pith/5VR5QTWZBSK6QXN36OEM3FDSG2.json","graph_json":"https://pith.science/api/pith-number/5VR5QTWZBSK6QXN36OEM3FDSG2/graph.json","events_json":"https://pith.science/api/pith-number/5VR5QTWZBSK6QXN36OEM3FDSG2/events.json","paper":"https://pith.science/paper/5VR5QTWZ"},"agent_actions":{"view_html":"https://pith.science/pith/5VR5QTWZBSK6QXN36OEM3FDSG2","download_json":"https://pith.science/pith/5VR5QTWZBSK6QXN36OEM3FDSG2.json","view_paper":"https://pith.science/paper/5VR5QTWZ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1303.5917&json=true","fetch_graph":"https://pith.science/api/pith-number/5VR5QTWZBSK6QXN36OEM3FDSG2/graph.json","fetch_events":"https://pith.science/api/pith-number/5VR5QTWZBSK6QXN36OEM3FDSG2/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/5VR5QTWZBSK6QXN36OEM3FDSG2/action/timestamp_anchor","attest_storage":"https://pith.science/pith/5VR5QTWZBSK6QXN36OEM3FDSG2/action/storage_attestation","attest_author":"https://pith.science/pith/5VR5QTWZBSK6QXN36OEM3FDSG2/action/author_attestation","sign_citation":"https://pith.science/pith/5VR5QTWZBSK6QXN36OEM3FDSG2/action/citation_signature","submit_replication":"https://pith.science/pith/5VR5QTWZBSK6QXN36OEM3FDSG2/action/replication_record"}},"created_at":"2026-05-18T01:50:59.261535+00:00","updated_at":"2026-05-18T01:50:59.261535+00:00"}