{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:HTRJHUJITRVQVQ4RTF3Z4UYONU","short_pith_number":"pith:HTRJHUJI","canonical_record":{"source":{"id":"1508.07631","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-08-30T20:27:35Z","cross_cats_sorted":["physics.atom-ph"],"title_canon_sha256":"afaae95d5e2e742e4f367f4683b076d60b7f77dcd54ff582b5b7d790e27efee3","abstract_canon_sha256":"1229bcfd5e724d6669f9507d1b8b28572d4f914b863102827db02f472dc5f109"},"schema_version":"1.0"},"canonical_sha256":"3ce293d1289c6b0ac39199779e530e6d37f420822a709dd82e0c61e697a24b96","source":{"kind":"arxiv","id":"1508.07631","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.07631","created_at":"2026-05-18T01:30:22Z"},{"alias_kind":"arxiv_version","alias_value":"1508.07631v1","created_at":"2026-05-18T01:30:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.07631","created_at":"2026-05-18T01:30:22Z"},{"alias_kind":"pith_short_12","alias_value":"HTRJHUJITRVQ","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_16","alias_value":"HTRJHUJITRVQVQ4R","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_8","alias_value":"HTRJHUJI","created_at":"2026-05-18T12:29:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:HTRJHUJITRVQVQ4RTF3Z4UYONU","target":"record","payload":{"canonical_record":{"source":{"id":"1508.07631","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-08-30T20:27:35Z","cross_cats_sorted":["physics.atom-ph"],"title_canon_sha256":"afaae95d5e2e742e4f367f4683b076d60b7f77dcd54ff582b5b7d790e27efee3","abstract_canon_sha256":"1229bcfd5e724d6669f9507d1b8b28572d4f914b863102827db02f472dc5f109"},"schema_version":"1.0"},"canonical_sha256":"3ce293d1289c6b0ac39199779e530e6d37f420822a709dd82e0c61e697a24b96","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:30:22.965354Z","signature_b64":"i26OZMLNDHOaitVAbTd3f6qIZrlmsD524I84uoGVAvHt3g9tMHY+oEB4In2We7SqE+FZOMWlIledWyCnCVfQAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3ce293d1289c6b0ac39199779e530e6d37f420822a709dd82e0c61e697a24b96","last_reissued_at":"2026-05-18T01:30:22.964712Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:30:22.964712Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1508.07631","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":"2026-05-18T01:30:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nV6m9ijbLBslqYjMyOC5ehBvGZsHBZE3isdbYaEBJRnSZnztXqrlmQ6FyBDioL5q3eko1pg75BFwvQRHqPVWBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T06:56:43.363692Z"},"content_sha256":"7c4daf388ed76605eb17f311417978b696f80b73351d45b9dfeba2e44f8f1acf","schema_version":"1.0","event_id":"sha256:7c4daf388ed76605eb17f311417978b696f80b73351d45b9dfeba2e44f8f1acf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:HTRJHUJITRVQVQ4RTF3Z4UYONU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"CHIANTI - An atomic database for Emission Lines. Version 8","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.atom-ph"],"primary_cat":"astro-ph.SR","authors_text":"E.Landi, G. Del Zanna, H.E. Mason, K.P. Dere, P.R. Young","submitted_at":"2015-08-30T20:27:35Z","abstract_excerpt":"We present version 8 of the CHIANTI database. This version includes a large amount of new data and ions, which represent a significant improvement in the soft X-ray, EUV and UV spectral regions, which several space missions currently cover. New data for neutrals and low charge states are also added. The data are assessed, but to improve the modelling of low-temperature plasma the effective collision strengths for most of the new datasets are not spline-fitted as previously, but are retained as calculated. This required a change of the format of the CHIANTI electron excitation files. The format"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.07631","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":"2026-05-18T01:30:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Anf5w6dZQaaK69Z2OVCmwvyO5hN9/RGlFcFe0W9BPV+m0+XaC58JcTKx82OdY78jUFRKZVdIMeLnlkUuc1TiBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T06:56:43.364191Z"},"content_sha256":"f50521eda262379a6d0ae2088207af2b693d56014c4728ea3b2a720c3a244689","schema_version":"1.0","event_id":"sha256:f50521eda262379a6d0ae2088207af2b693d56014c4728ea3b2a720c3a244689"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HTRJHUJITRVQVQ4RTF3Z4UYONU/bundle.json","state_url":"https://pith.science/pith/HTRJHUJITRVQVQ4RTF3Z4UYONU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HTRJHUJITRVQVQ4RTF3Z4UYONU/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":"2026-06-05T06:56:43Z","links":{"resolver":"https://pith.science/pith/HTRJHUJITRVQVQ4RTF3Z4UYONU","bundle":"https://pith.science/pith/HTRJHUJITRVQVQ4RTF3Z4UYONU/bundle.json","state":"https://pith.science/pith/HTRJHUJITRVQVQ4RTF3Z4UYONU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HTRJHUJITRVQVQ4RTF3Z4UYONU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:HTRJHUJITRVQVQ4RTF3Z4UYONU","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":"1229bcfd5e724d6669f9507d1b8b28572d4f914b863102827db02f472dc5f109","cross_cats_sorted":["physics.atom-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-08-30T20:27:35Z","title_canon_sha256":"afaae95d5e2e742e4f367f4683b076d60b7f77dcd54ff582b5b7d790e27efee3"},"schema_version":"1.0","source":{"id":"1508.07631","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.07631","created_at":"2026-05-18T01:30:22Z"},{"alias_kind":"arxiv_version","alias_value":"1508.07631v1","created_at":"2026-05-18T01:30:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.07631","created_at":"2026-05-18T01:30:22Z"},{"alias_kind":"pith_short_12","alias_value":"HTRJHUJITRVQ","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_16","alias_value":"HTRJHUJITRVQVQ4R","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_8","alias_value":"HTRJHUJI","created_at":"2026-05-18T12:29:25Z"}],"graph_snapshots":[{"event_id":"sha256:f50521eda262379a6d0ae2088207af2b693d56014c4728ea3b2a720c3a244689","target":"graph","created_at":"2026-05-18T01:30:22Z","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 present version 8 of the CHIANTI database. This version includes a large amount of new data and ions, which represent a significant improvement in the soft X-ray, EUV and UV spectral regions, which several space missions currently cover. New data for neutrals and low charge states are also added. The data are assessed, but to improve the modelling of low-temperature plasma the effective collision strengths for most of the new datasets are not spline-fitted as previously, but are retained as calculated. This required a change of the format of the CHIANTI electron excitation files. The format","authors_text":"E.Landi, G. Del Zanna, H.E. Mason, K.P. Dere, P.R. Young","cross_cats":["physics.atom-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-08-30T20:27:35Z","title":"CHIANTI - An atomic database for Emission Lines. Version 8"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.07631","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":"sha256:7c4daf388ed76605eb17f311417978b696f80b73351d45b9dfeba2e44f8f1acf","target":"record","created_at":"2026-05-18T01:30:22Z","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":"1229bcfd5e724d6669f9507d1b8b28572d4f914b863102827db02f472dc5f109","cross_cats_sorted":["physics.atom-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-08-30T20:27:35Z","title_canon_sha256":"afaae95d5e2e742e4f367f4683b076d60b7f77dcd54ff582b5b7d790e27efee3"},"schema_version":"1.0","source":{"id":"1508.07631","kind":"arxiv","version":1}},"canonical_sha256":"3ce293d1289c6b0ac39199779e530e6d37f420822a709dd82e0c61e697a24b96","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3ce293d1289c6b0ac39199779e530e6d37f420822a709dd82e0c61e697a24b96","first_computed_at":"2026-05-18T01:30:22.964712Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:30:22.964712Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"i26OZMLNDHOaitVAbTd3f6qIZrlmsD524I84uoGVAvHt3g9tMHY+oEB4In2We7SqE+FZOMWlIledWyCnCVfQAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:30:22.965354Z","signed_message":"canonical_sha256_bytes"},"source_id":"1508.07631","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7c4daf388ed76605eb17f311417978b696f80b73351d45b9dfeba2e44f8f1acf","sha256:f50521eda262379a6d0ae2088207af2b693d56014c4728ea3b2a720c3a244689"],"state_sha256":"dddce7fac5304189b72bfb5eddd273ab83f2455227abc3ef8f39c154570ace0f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AuXOrtaxKR73KKT/K6DhhWx4GTvNMU/ADkr0tHwGPmI24jTR8z+co8V6Z0ZRTAxjDP2kujp5o3kpKUovJVzPCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T06:56:43.366876Z","bundle_sha256":"4acc49cba180c47e2a7316d6cbf0faefac0d7f3be97de9b47ba95c4d034893f9"}}