{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:W6CQARGED6X2M7NNDED2F5GEJE","short_pith_number":"pith:W6CQARGE","canonical_record":{"source":{"id":"1512.03477","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-12-10T22:53:53Z","cross_cats_sorted":[],"title_canon_sha256":"b2fac43c8a0657a514fd55f650f6554fa8e03a8c853b431eab24be6606a9cbd3","abstract_canon_sha256":"2ef458f75a75a0cba64e1bfe99d3d3d7252a5903ae3bdabc085e3e71ef2b7274"},"schema_version":"1.0"},"canonical_sha256":"b7850044c41fafa67dad1907a2f4c44904bfb64ca237b8efc1e32444a8a090a1","source":{"kind":"arxiv","id":"1512.03477","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.03477","created_at":"2026-05-18T01:24:32Z"},{"alias_kind":"arxiv_version","alias_value":"1512.03477v1","created_at":"2026-05-18T01:24:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.03477","created_at":"2026-05-18T01:24:32Z"},{"alias_kind":"pith_short_12","alias_value":"W6CQARGED6X2","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"W6CQARGED6X2M7NN","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"W6CQARGE","created_at":"2026-05-18T12:29:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:W6CQARGED6X2M7NNDED2F5GEJE","target":"record","payload":{"canonical_record":{"source":{"id":"1512.03477","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-12-10T22:53:53Z","cross_cats_sorted":[],"title_canon_sha256":"b2fac43c8a0657a514fd55f650f6554fa8e03a8c853b431eab24be6606a9cbd3","abstract_canon_sha256":"2ef458f75a75a0cba64e1bfe99d3d3d7252a5903ae3bdabc085e3e71ef2b7274"},"schema_version":"1.0"},"canonical_sha256":"b7850044c41fafa67dad1907a2f4c44904bfb64ca237b8efc1e32444a8a090a1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:24:32.339052Z","signature_b64":"cUzMqEimoFdJzkFqhUlTvy1+o3Z1Fg1CfxobwXae2Dh29nqktAHqI8amz2eiv1aQSy2EKy42CbzZPSMNFFM1DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b7850044c41fafa67dad1907a2f4c44904bfb64ca237b8efc1e32444a8a090a1","last_reissued_at":"2026-05-18T01:24:32.338552Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:24:32.338552Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1512.03477","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":"2026-05-18T01:24:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fs1UmhsN/0hsUspis1lc3WN3eyRxZ+ZmHe8kaVUssCrSzbrBTxW0TNTPKLv5GAWfkUNIDpkoS7iZ0RKJq/aJCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-21T04:23:01.512412Z"},"content_sha256":"663ba2ef6989baa9b3e41b2451f88ffbdf11f5784f848d22e124d5091c7edc24","schema_version":"1.0","event_id":"sha256:663ba2ef6989baa9b3e41b2451f88ffbdf11f5784f848d22e124d5091c7edc24"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:W6CQARGED6X2M7NNDED2F5GEJE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Observations and modelling of Helium lines in solar flares","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Graham S. Kerr, Lyndsay Fletcher, Nicolas Labrosse, Paulo J. A. Sim\\~oes","submitted_at":"2015-12-10T22:53:53Z","abstract_excerpt":"We explore the response of the He II 304 {\\AA} and He I 584 {\\AA} line intensities to electron beam heating in solar flares using radiative hydrodynamic simulations. Comparing different electron beams parameters, we found that the intensities of both He lines are very sensitive to the energy flux deposited in the chromosphere, or more specifically to the heating rate, with He II 304 {\\AA} being more sensitive to the heating than He I 584 {\\AA}. Therefore, the He line ratio increases for larger heating rates in the chromosphere. A similar trend is found in observations, using SDO/EVE He irradia"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.03477","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:24:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"u+kpxsDYxU3JwyNmaYoiK6FHTef8lTNX1Ez+DFDzwcinnk7GHAH+62eqEhK0pO9xPrDIA2AA9AukcOzNMo4WAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-21T04:23:01.512763Z"},"content_sha256":"74091af420ec9de14830e2459c6cb3217e04157a79b422ba65e0b32577a57fe9","schema_version":"1.0","event_id":"sha256:74091af420ec9de14830e2459c6cb3217e04157a79b422ba65e0b32577a57fe9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/W6CQARGED6X2M7NNDED2F5GEJE/bundle.json","state_url":"https://pith.science/pith/W6CQARGED6X2M7NNDED2F5GEJE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/W6CQARGED6X2M7NNDED2F5GEJE/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":"2026-06-21T04:23:01Z","links":{"resolver":"https://pith.science/pith/W6CQARGED6X2M7NNDED2F5GEJE","bundle":"https://pith.science/pith/W6CQARGED6X2M7NNDED2F5GEJE/bundle.json","state":"https://pith.science/pith/W6CQARGED6X2M7NNDED2F5GEJE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/W6CQARGED6X2M7NNDED2F5GEJE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:W6CQARGED6X2M7NNDED2F5GEJE","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":"2ef458f75a75a0cba64e1bfe99d3d3d7252a5903ae3bdabc085e3e71ef2b7274","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-12-10T22:53:53Z","title_canon_sha256":"b2fac43c8a0657a514fd55f650f6554fa8e03a8c853b431eab24be6606a9cbd3"},"schema_version":"1.0","source":{"id":"1512.03477","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.03477","created_at":"2026-05-18T01:24:32Z"},{"alias_kind":"arxiv_version","alias_value":"1512.03477v1","created_at":"2026-05-18T01:24:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.03477","created_at":"2026-05-18T01:24:32Z"},{"alias_kind":"pith_short_12","alias_value":"W6CQARGED6X2","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"W6CQARGED6X2M7NN","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"W6CQARGE","created_at":"2026-05-18T12:29:47Z"}],"graph_snapshots":[{"event_id":"sha256:74091af420ec9de14830e2459c6cb3217e04157a79b422ba65e0b32577a57fe9","target":"graph","created_at":"2026-05-18T01:24:32Z","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 explore the response of the He II 304 {\\AA} and He I 584 {\\AA} line intensities to electron beam heating in solar flares using radiative hydrodynamic simulations. Comparing different electron beams parameters, we found that the intensities of both He lines are very sensitive to the energy flux deposited in the chromosphere, or more specifically to the heating rate, with He II 304 {\\AA} being more sensitive to the heating than He I 584 {\\AA}. Therefore, the He line ratio increases for larger heating rates in the chromosphere. A similar trend is found in observations, using SDO/EVE He irradia","authors_text":"Graham S. Kerr, Lyndsay Fletcher, Nicolas Labrosse, Paulo J. A. Sim\\~oes","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-12-10T22:53:53Z","title":"Observations and modelling of Helium lines in solar flares"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.03477","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":"sha256:663ba2ef6989baa9b3e41b2451f88ffbdf11f5784f848d22e124d5091c7edc24","target":"record","created_at":"2026-05-18T01:24:32Z","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":"2ef458f75a75a0cba64e1bfe99d3d3d7252a5903ae3bdabc085e3e71ef2b7274","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-12-10T22:53:53Z","title_canon_sha256":"b2fac43c8a0657a514fd55f650f6554fa8e03a8c853b431eab24be6606a9cbd3"},"schema_version":"1.0","source":{"id":"1512.03477","kind":"arxiv","version":1}},"canonical_sha256":"b7850044c41fafa67dad1907a2f4c44904bfb64ca237b8efc1e32444a8a090a1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b7850044c41fafa67dad1907a2f4c44904bfb64ca237b8efc1e32444a8a090a1","first_computed_at":"2026-05-18T01:24:32.338552Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:24:32.338552Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"cUzMqEimoFdJzkFqhUlTvy1+o3Z1Fg1CfxobwXae2Dh29nqktAHqI8amz2eiv1aQSy2EKy42CbzZPSMNFFM1DA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:24:32.339052Z","signed_message":"canonical_sha256_bytes"},"source_id":"1512.03477","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:663ba2ef6989baa9b3e41b2451f88ffbdf11f5784f848d22e124d5091c7edc24","sha256:74091af420ec9de14830e2459c6cb3217e04157a79b422ba65e0b32577a57fe9"],"state_sha256":"7eb86b4ea55d4707d623a8455dfff1824029aab46d0f4757c4004f77f4f3ab4a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ue4icYfOdjgyopeVQRAIKmZe7jAKM9woDorbuxstqEWN+Z3ek9f1w5bHUwomzdddIDrHeiPWONsLqIoPmh8UBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-21T04:23:01.514629Z","bundle_sha256":"a282b1ff99a1338624bae6fb676591dab89e60e41897d8adedb8ae572927a8cb"}}