{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:YU443E7IOSJCRKKBGGUUZL4B6H","short_pith_number":"pith:YU443E7I","canonical_record":{"source":{"id":"1207.1990","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-07-09T09:08:52Z","cross_cats_sorted":[],"title_canon_sha256":"95da473642340e6a21fcf6a367bb51c8edbfb18fa6e76e345511479e682a8d03","abstract_canon_sha256":"887844651b1194dd8b5f6193baa5558348b1316ddfa89a5cf15e4d244178e51c"},"schema_version":"1.0"},"canonical_sha256":"c539cd93e8749228a94131a94caf81f1e983bd8e8d9d207476003adef983447f","source":{"kind":"arxiv","id":"1207.1990","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1207.1990","created_at":"2026-05-18T01:56:26Z"},{"alias_kind":"arxiv_version","alias_value":"1207.1990v1","created_at":"2026-05-18T01:56:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1207.1990","created_at":"2026-05-18T01:56:26Z"},{"alias_kind":"pith_short_12","alias_value":"YU443E7IOSJC","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_16","alias_value":"YU443E7IOSJCRKKB","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_8","alias_value":"YU443E7I","created_at":"2026-05-18T12:27:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:YU443E7IOSJCRKKBGGUUZL4B6H","target":"record","payload":{"canonical_record":{"source":{"id":"1207.1990","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-07-09T09:08:52Z","cross_cats_sorted":[],"title_canon_sha256":"95da473642340e6a21fcf6a367bb51c8edbfb18fa6e76e345511479e682a8d03","abstract_canon_sha256":"887844651b1194dd8b5f6193baa5558348b1316ddfa89a5cf15e4d244178e51c"},"schema_version":"1.0"},"canonical_sha256":"c539cd93e8749228a94131a94caf81f1e983bd8e8d9d207476003adef983447f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:56:26.715741Z","signature_b64":"zXfMU1DbFXjxhJsPer/+hPc/kpW00izLZ3Cr2Dmn462BR3MUasRxLlsuS6XyA3JZzml8ilO3UjxaXmURyt5qDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c539cd93e8749228a94131a94caf81f1e983bd8e8d9d207476003adef983447f","last_reissued_at":"2026-05-18T01:56:26.715135Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:56:26.715135Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1207.1990","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":"2026-05-18T01:56:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FZiWJhQGo1n6x92qcd/CJtAXyRnDspUVtWX/wYhZ2NaBuvZ4mc1960MjjhL7dq7YkLrvjA9Q3H/FvtzehYRKDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T13:59:45.847846Z"},"content_sha256":"f9b110d56214549cf11f7ef0aca8c91a7560b04b6453f23f9c7f650f38b1ea93","schema_version":"1.0","event_id":"sha256:f9b110d56214549cf11f7ef0aca8c91a7560b04b6453f23f9c7f650f38b1ea93"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:YU443E7IOSJCRKKBGGUUZL4B6H","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Time-Dependent Density Diagnostics of Solar Flare Plasmas Using SDO/EVE","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Francis P. Keenan, Michael B. Kennedy, Mihalis Mathioudakis, Ryan O. Milligan","submitted_at":"2012-07-09T09:08:52Z","abstract_excerpt":"Temporally-resolved electron density measurements of solar flare plasmas are presented using data from the EUV Variability Experiment (EVE) onboard the Solar Dynamics Observatory (SDO). The EVE spectral range contains emission lines formed between 10^4-10^7 K, including transitions from highly ionized iron (>10 MK). Using three density-sensitive Fe XXI ratios, peak electron densities of 10^(11.2)-10^(12.1) cm^(-3) were found during four X-class flares. While previous measurements of densities at such high temperatures were made at only one point during a flaring event, EVE now allows the tempo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1207.1990","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":"2026-05-18T01:56:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Mmx2q82pvZCO2KzCy1i8wPXdRFb/LgZiXAAmRrtf/CWwy6D5bnF43OWrG8YndZR/8VffgyyTXzHDlGt0o6SSDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T13:59:45.848197Z"},"content_sha256":"2ca2a87920388c9ac3ab5a8543a7251562368a06b6db00391c11cdfdd4d259f4","schema_version":"1.0","event_id":"sha256:2ca2a87920388c9ac3ab5a8543a7251562368a06b6db00391c11cdfdd4d259f4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YU443E7IOSJCRKKBGGUUZL4B6H/bundle.json","state_url":"https://pith.science/pith/YU443E7IOSJCRKKBGGUUZL4B6H/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YU443E7IOSJCRKKBGGUUZL4B6H/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":"2026-06-05T13:59:45Z","links":{"resolver":"https://pith.science/pith/YU443E7IOSJCRKKBGGUUZL4B6H","bundle":"https://pith.science/pith/YU443E7IOSJCRKKBGGUUZL4B6H/bundle.json","state":"https://pith.science/pith/YU443E7IOSJCRKKBGGUUZL4B6H/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YU443E7IOSJCRKKBGGUUZL4B6H/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:YU443E7IOSJCRKKBGGUUZL4B6H","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":"887844651b1194dd8b5f6193baa5558348b1316ddfa89a5cf15e4d244178e51c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-07-09T09:08:52Z","title_canon_sha256":"95da473642340e6a21fcf6a367bb51c8edbfb18fa6e76e345511479e682a8d03"},"schema_version":"1.0","source":{"id":"1207.1990","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1207.1990","created_at":"2026-05-18T01:56:26Z"},{"alias_kind":"arxiv_version","alias_value":"1207.1990v1","created_at":"2026-05-18T01:56:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1207.1990","created_at":"2026-05-18T01:56:26Z"},{"alias_kind":"pith_short_12","alias_value":"YU443E7IOSJC","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_16","alias_value":"YU443E7IOSJCRKKB","created_at":"2026-05-18T12:27:30Z"},{"alias_kind":"pith_short_8","alias_value":"YU443E7I","created_at":"2026-05-18T12:27:30Z"}],"graph_snapshots":[{"event_id":"sha256:2ca2a87920388c9ac3ab5a8543a7251562368a06b6db00391c11cdfdd4d259f4","target":"graph","created_at":"2026-05-18T01:56:26Z","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":"Temporally-resolved electron density measurements of solar flare plasmas are presented using data from the EUV Variability Experiment (EVE) onboard the Solar Dynamics Observatory (SDO). The EVE spectral range contains emission lines formed between 10^4-10^7 K, including transitions from highly ionized iron (>10 MK). Using three density-sensitive Fe XXI ratios, peak electron densities of 10^(11.2)-10^(12.1) cm^(-3) were found during four X-class flares. While previous measurements of densities at such high temperatures were made at only one point during a flaring event, EVE now allows the tempo","authors_text":"Francis P. Keenan, Michael B. Kennedy, Mihalis Mathioudakis, Ryan O. Milligan","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-07-09T09:08:52Z","title":"Time-Dependent Density Diagnostics of Solar Flare Plasmas Using SDO/EVE"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1207.1990","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:f9b110d56214549cf11f7ef0aca8c91a7560b04b6453f23f9c7f650f38b1ea93","target":"record","created_at":"2026-05-18T01:56:26Z","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":"887844651b1194dd8b5f6193baa5558348b1316ddfa89a5cf15e4d244178e51c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-07-09T09:08:52Z","title_canon_sha256":"95da473642340e6a21fcf6a367bb51c8edbfb18fa6e76e345511479e682a8d03"},"schema_version":"1.0","source":{"id":"1207.1990","kind":"arxiv","version":1}},"canonical_sha256":"c539cd93e8749228a94131a94caf81f1e983bd8e8d9d207476003adef983447f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c539cd93e8749228a94131a94caf81f1e983bd8e8d9d207476003adef983447f","first_computed_at":"2026-05-18T01:56:26.715135Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:56:26.715135Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zXfMU1DbFXjxhJsPer/+hPc/kpW00izLZ3Cr2Dmn462BR3MUasRxLlsuS6XyA3JZzml8ilO3UjxaXmURyt5qDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:56:26.715741Z","signed_message":"canonical_sha256_bytes"},"source_id":"1207.1990","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f9b110d56214549cf11f7ef0aca8c91a7560b04b6453f23f9c7f650f38b1ea93","sha256:2ca2a87920388c9ac3ab5a8543a7251562368a06b6db00391c11cdfdd4d259f4"],"state_sha256":"a74f525cac265b4d0e0311d940b45cf047cd6739f970e9843a734aa0277844b0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wkyZAOwRwytEjSn6J7bQvybwo+Plu16sf0QF6uHg404DyCdypPHc/tlwWgvDAn6gm4GHkMFO0A65LqUvT/PBAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T13:59:45.850134Z","bundle_sha256":"a04645a541641e6596ea7d90ac5cbd0693203524a610887b8daa6c677ebd0d02"}}