{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:NIIENQJIBR73FDGD7CVNCUKGOV","short_pith_number":"pith:NIIENQJI","canonical_record":{"source":{"id":"1905.08264","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-05-20T18:00:03Z","cross_cats_sorted":[],"title_canon_sha256":"01b80e162271763ca411db791c75f151528fa3e6755886a49aee235583d6c116","abstract_canon_sha256":"7045f586f9fd915665bb586d3fc8570bb03abe23af2138e3f9a120b64de88e8e"},"schema_version":"1.0"},"canonical_sha256":"6a1046c1280c7fb28cc3f8aad15146757bb2b547b66c1cfbedd75b9675cad5ff","source":{"kind":"arxiv","id":"1905.08264","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.08264","created_at":"2026-05-17T23:41:42Z"},{"alias_kind":"arxiv_version","alias_value":"1905.08264v1","created_at":"2026-05-17T23:41:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.08264","created_at":"2026-05-17T23:41:42Z"},{"alias_kind":"pith_short_12","alias_value":"NIIENQJIBR73","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_16","alias_value":"NIIENQJIBR73FDGD","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_8","alias_value":"NIIENQJI","created_at":"2026-05-18T12:33:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:NIIENQJIBR73FDGD7CVNCUKGOV","target":"record","payload":{"canonical_record":{"source":{"id":"1905.08264","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-05-20T18:00:03Z","cross_cats_sorted":[],"title_canon_sha256":"01b80e162271763ca411db791c75f151528fa3e6755886a49aee235583d6c116","abstract_canon_sha256":"7045f586f9fd915665bb586d3fc8570bb03abe23af2138e3f9a120b64de88e8e"},"schema_version":"1.0"},"canonical_sha256":"6a1046c1280c7fb28cc3f8aad15146757bb2b547b66c1cfbedd75b9675cad5ff","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:41:42.066796Z","signature_b64":"6dtrWn92NuR0iTmvc4IJl5mOfqqrsFTIzdi1RB8aERo2lmrAV62L8D7tRZEEr54X6JG+tMrJ5+z6cnx3pOBuBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6a1046c1280c7fb28cc3f8aad15146757bb2b547b66c1cfbedd75b9675cad5ff","last_reissued_at":"2026-05-17T23:41:42.066230Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:41:42.066230Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1905.08264","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":"2026-05-17T23:41:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ta0+HOCy7z4usGUXh2JHIPBYwMlt6TXvAj6OmeHEO184yPej/TVb2baV9uMjsAtstAqKjBUNPMdFdHEo8VptAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T02:33:34.396955Z"},"content_sha256":"a410344490ecf95aad060529c16ecd839cbc99739ed9cc4d12d0ea6f45e3c972","schema_version":"1.0","event_id":"sha256:a410344490ecf95aad060529c16ecd839cbc99739ed9cc4d12d0ea6f45e3c972"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:NIIENQJIBR73FDGD7CVNCUKGOV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Semi-empirical model atmospheres for the chromosphere of the sunspot penumbra and umbral flashes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Luc Rouppe van der Voort, Souvik Bose, Tiago M.D. Pereira, Vasco M. J. Henriques","submitted_at":"2019-05-20T18:00:03Z","abstract_excerpt":"Context. The solar chromosphere and the lower transition region is believed to play a crucial role in the heating of the solar corona. Models that describe the chromosphere (and the lower transition region), accounting for its highly dynamic and structured character are, so far, found to be lacking. This is partly due to the breakdown of complete frequency redistribution in the chromospheric layers and also because of the difficulty in obtaining complete sets of observations that adequately constrain the solar atmosphere at all relevant heights. Aims. We aim to obtain semi-empirical model atmo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.08264","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":"2026-05-17T23:41:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XstRLIJab/hSsPCvpMs2lRnyhyythW8B30bo+CSJSz1Iv4r+SvtEpNhJWU2oqlw91x3X32pF1xUTXNys2epvBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T02:33:34.397611Z"},"content_sha256":"3065151ec2f994c48c6cb1dea35f1f9ed0f89eeff11207715d0941d74e56aa49","schema_version":"1.0","event_id":"sha256:3065151ec2f994c48c6cb1dea35f1f9ed0f89eeff11207715d0941d74e56aa49"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NIIENQJIBR73FDGD7CVNCUKGOV/bundle.json","state_url":"https://pith.science/pith/NIIENQJIBR73FDGD7CVNCUKGOV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NIIENQJIBR73FDGD7CVNCUKGOV/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":"2026-05-26T02:33:34Z","links":{"resolver":"https://pith.science/pith/NIIENQJIBR73FDGD7CVNCUKGOV","bundle":"https://pith.science/pith/NIIENQJIBR73FDGD7CVNCUKGOV/bundle.json","state":"https://pith.science/pith/NIIENQJIBR73FDGD7CVNCUKGOV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NIIENQJIBR73FDGD7CVNCUKGOV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:NIIENQJIBR73FDGD7CVNCUKGOV","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":"7045f586f9fd915665bb586d3fc8570bb03abe23af2138e3f9a120b64de88e8e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-05-20T18:00:03Z","title_canon_sha256":"01b80e162271763ca411db791c75f151528fa3e6755886a49aee235583d6c116"},"schema_version":"1.0","source":{"id":"1905.08264","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.08264","created_at":"2026-05-17T23:41:42Z"},{"alias_kind":"arxiv_version","alias_value":"1905.08264v1","created_at":"2026-05-17T23:41:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.08264","created_at":"2026-05-17T23:41:42Z"},{"alias_kind":"pith_short_12","alias_value":"NIIENQJIBR73","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_16","alias_value":"NIIENQJIBR73FDGD","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_8","alias_value":"NIIENQJI","created_at":"2026-05-18T12:33:24Z"}],"graph_snapshots":[{"event_id":"sha256:3065151ec2f994c48c6cb1dea35f1f9ed0f89eeff11207715d0941d74e56aa49","target":"graph","created_at":"2026-05-17T23:41:42Z","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":"Context. The solar chromosphere and the lower transition region is believed to play a crucial role in the heating of the solar corona. Models that describe the chromosphere (and the lower transition region), accounting for its highly dynamic and structured character are, so far, found to be lacking. This is partly due to the breakdown of complete frequency redistribution in the chromospheric layers and also because of the difficulty in obtaining complete sets of observations that adequately constrain the solar atmosphere at all relevant heights. Aims. We aim to obtain semi-empirical model atmo","authors_text":"Luc Rouppe van der Voort, Souvik Bose, Tiago M.D. Pereira, Vasco M. J. Henriques","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-05-20T18:00:03Z","title":"Semi-empirical model atmospheres for the chromosphere of the sunspot penumbra and umbral flashes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.08264","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:a410344490ecf95aad060529c16ecd839cbc99739ed9cc4d12d0ea6f45e3c972","target":"record","created_at":"2026-05-17T23:41:42Z","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":"7045f586f9fd915665bb586d3fc8570bb03abe23af2138e3f9a120b64de88e8e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-05-20T18:00:03Z","title_canon_sha256":"01b80e162271763ca411db791c75f151528fa3e6755886a49aee235583d6c116"},"schema_version":"1.0","source":{"id":"1905.08264","kind":"arxiv","version":1}},"canonical_sha256":"6a1046c1280c7fb28cc3f8aad15146757bb2b547b66c1cfbedd75b9675cad5ff","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6a1046c1280c7fb28cc3f8aad15146757bb2b547b66c1cfbedd75b9675cad5ff","first_computed_at":"2026-05-17T23:41:42.066230Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:41:42.066230Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6dtrWn92NuR0iTmvc4IJl5mOfqqrsFTIzdi1RB8aERo2lmrAV62L8D7tRZEEr54X6JG+tMrJ5+z6cnx3pOBuBw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:41:42.066796Z","signed_message":"canonical_sha256_bytes"},"source_id":"1905.08264","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a410344490ecf95aad060529c16ecd839cbc99739ed9cc4d12d0ea6f45e3c972","sha256:3065151ec2f994c48c6cb1dea35f1f9ed0f89eeff11207715d0941d74e56aa49"],"state_sha256":"fdf9d9da110388d8a45523eb32b6c2b0bcc3ca852af0f126dc495330754b6eab"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eH05nsnPQJ7Xa0CwJ2m8OlI5XVrrHuFsE7jRF7IE9cqPXArhOnaX0SvfWKpwxIBXJjcRYBzXf6LxrvWv+A71Cg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T02:33:34.401036Z","bundle_sha256":"00f12cf8b5888663f9f1dc2cc96371e894419e908196613b39af0df90ea02307"}}