{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:PJ6FLZAWFAEMXDV2BK6GXARV2X","short_pith_number":"pith:PJ6FLZAW","canonical_record":{"source":{"id":"2012.03702","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-12-07T14:02:04Z","cross_cats_sorted":[],"title_canon_sha256":"21e7bc9e8a8d04879ba468533683704f87235edda7e5f5548c01c2e026d8c795","abstract_canon_sha256":"b40c2803112012e9f8cdb75c9b410e20940f946d976c729f89e57c66b8e0890e"},"schema_version":"1.0"},"canonical_sha256":"7a7c55e4162808cb8eba0abc6b8235d5c745bf6d282f316b4c670c8ead15ed66","source":{"kind":"arxiv","id":"2012.03702","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2012.03702","created_at":"2026-07-05T02:19:39Z"},{"alias_kind":"arxiv_version","alias_value":"2012.03702v1","created_at":"2026-07-05T02:19:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2012.03702","created_at":"2026-07-05T02:19:39Z"},{"alias_kind":"pith_short_12","alias_value":"PJ6FLZAWFAEM","created_at":"2026-07-05T02:19:39Z"},{"alias_kind":"pith_short_16","alias_value":"PJ6FLZAWFAEMXDV2","created_at":"2026-07-05T02:19:39Z"},{"alias_kind":"pith_short_8","alias_value":"PJ6FLZAW","created_at":"2026-07-05T02:19:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:PJ6FLZAWFAEMXDV2BK6GXARV2X","target":"record","payload":{"canonical_record":{"source":{"id":"2012.03702","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-12-07T14:02:04Z","cross_cats_sorted":[],"title_canon_sha256":"21e7bc9e8a8d04879ba468533683704f87235edda7e5f5548c01c2e026d8c795","abstract_canon_sha256":"b40c2803112012e9f8cdb75c9b410e20940f946d976c729f89e57c66b8e0890e"},"schema_version":"1.0"},"canonical_sha256":"7a7c55e4162808cb8eba0abc6b8235d5c745bf6d282f316b4c670c8ead15ed66","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:19:39.789396Z","signature_b64":"q8QBSMKTlMPTlp20HbxgvFgdFdSex7HGwEIQklIZFMsAw3qaSQ8T3cZhmWtTXSKz/JncStpUQRWQdS6fNfshAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7a7c55e4162808cb8eba0abc6b8235d5c745bf6d282f316b4c670c8ead15ed66","last_reissued_at":"2026-07-05T02:19:39.788872Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:19:39.788872Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2012.03702","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":"2026-07-05T02:19:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Cf4x1BP7SKgTtI/Rj/3B2Edtwx8echPorSZ559eikntsa/Ohwmwhgxj9IU+QgTRd73xpN7FLJFEjCHm8pZ2WDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T09:21:24.051397Z"},"content_sha256":"9e53827cebe25daa1c7d4d408be834d64ad7ba3ee26c44ef6b0d6f491e74f4c3","schema_version":"1.0","event_id":"sha256:9e53827cebe25daa1c7d4d408be834d64ad7ba3ee26c44ef6b0d6f491e74f4c3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:PJ6FLZAWFAEMXDV2BK6GXARV2X","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Semi-empirical models of spicule from inversion of Ca II 8542 \\AA\\ line","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"D. Kuridze, H. Socas-Navarro, J. Koza, R. Oliver","submitted_at":"2020-12-07T14:02:04Z","abstract_excerpt":"We study a solar spicule observed off-limb using high-resolution imaging spectroscopy in the Ca II 8542 \\AA\\ line obtained with the CRisp Imaging SpectroPolarimeter (CRISP) on the Swedish 1-m Solar Telescope. Using a new version of the non-LTE code NICOLE specifically developed for this problem we invert the spicule single- and double-peak line profiles. This new version considers off-limb geometry and computes atomic populations by solving the 1D radiative transfer assuming a vertical stratification. The inversion proceeds by fitting the observed spectral profiles at 14 different heights with"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.03702","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2012.03702/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T02:19:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Y4AlJOCObhLa8XQaYglykhzQenSXBqX0Uv9AK9YcnWfy+O9rJrtFF3s9S0xSs5fNdEZ5VXSfiRHnNQ6ZFAAmBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T09:21:24.051783Z"},"content_sha256":"8fb2a3708338c67a5fa2f52fc96d4543bd001faf001740ef63766ff736ff9dce","schema_version":"1.0","event_id":"sha256:8fb2a3708338c67a5fa2f52fc96d4543bd001faf001740ef63766ff736ff9dce"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PJ6FLZAWFAEMXDV2BK6GXARV2X/bundle.json","state_url":"https://pith.science/pith/PJ6FLZAWFAEMXDV2BK6GXARV2X/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PJ6FLZAWFAEMXDV2BK6GXARV2X/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":"2026-07-05T09:21:24Z","links":{"resolver":"https://pith.science/pith/PJ6FLZAWFAEMXDV2BK6GXARV2X","bundle":"https://pith.science/pith/PJ6FLZAWFAEMXDV2BK6GXARV2X/bundle.json","state":"https://pith.science/pith/PJ6FLZAWFAEMXDV2BK6GXARV2X/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PJ6FLZAWFAEMXDV2BK6GXARV2X/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:PJ6FLZAWFAEMXDV2BK6GXARV2X","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":"b40c2803112012e9f8cdb75c9b410e20940f946d976c729f89e57c66b8e0890e","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-12-07T14:02:04Z","title_canon_sha256":"21e7bc9e8a8d04879ba468533683704f87235edda7e5f5548c01c2e026d8c795"},"schema_version":"1.0","source":{"id":"2012.03702","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2012.03702","created_at":"2026-07-05T02:19:39Z"},{"alias_kind":"arxiv_version","alias_value":"2012.03702v1","created_at":"2026-07-05T02:19:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2012.03702","created_at":"2026-07-05T02:19:39Z"},{"alias_kind":"pith_short_12","alias_value":"PJ6FLZAWFAEM","created_at":"2026-07-05T02:19:39Z"},{"alias_kind":"pith_short_16","alias_value":"PJ6FLZAWFAEMXDV2","created_at":"2026-07-05T02:19:39Z"},{"alias_kind":"pith_short_8","alias_value":"PJ6FLZAW","created_at":"2026-07-05T02:19:39Z"}],"graph_snapshots":[{"event_id":"sha256:8fb2a3708338c67a5fa2f52fc96d4543bd001faf001740ef63766ff736ff9dce","target":"graph","created_at":"2026-07-05T02:19:39Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2012.03702/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We study a solar spicule observed off-limb using high-resolution imaging spectroscopy in the Ca II 8542 \\AA\\ line obtained with the CRisp Imaging SpectroPolarimeter (CRISP) on the Swedish 1-m Solar Telescope. Using a new version of the non-LTE code NICOLE specifically developed for this problem we invert the spicule single- and double-peak line profiles. This new version considers off-limb geometry and computes atomic populations by solving the 1D radiative transfer assuming a vertical stratification. The inversion proceeds by fitting the observed spectral profiles at 14 different heights with","authors_text":"D. Kuridze, H. Socas-Navarro, J. Koza, R. Oliver","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-12-07T14:02:04Z","title":"Semi-empirical models of spicule from inversion of Ca II 8542 \\AA\\ line"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.03702","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":"sha256:9e53827cebe25daa1c7d4d408be834d64ad7ba3ee26c44ef6b0d6f491e74f4c3","target":"record","created_at":"2026-07-05T02:19:39Z","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":"b40c2803112012e9f8cdb75c9b410e20940f946d976c729f89e57c66b8e0890e","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-12-07T14:02:04Z","title_canon_sha256":"21e7bc9e8a8d04879ba468533683704f87235edda7e5f5548c01c2e026d8c795"},"schema_version":"1.0","source":{"id":"2012.03702","kind":"arxiv","version":1}},"canonical_sha256":"7a7c55e4162808cb8eba0abc6b8235d5c745bf6d282f316b4c670c8ead15ed66","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7a7c55e4162808cb8eba0abc6b8235d5c745bf6d282f316b4c670c8ead15ed66","first_computed_at":"2026-07-05T02:19:39.788872Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:19:39.788872Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"q8QBSMKTlMPTlp20HbxgvFgdFdSex7HGwEIQklIZFMsAw3qaSQ8T3cZhmWtTXSKz/JncStpUQRWQdS6fNfshAw==","signature_status":"signed_v1","signed_at":"2026-07-05T02:19:39.789396Z","signed_message":"canonical_sha256_bytes"},"source_id":"2012.03702","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9e53827cebe25daa1c7d4d408be834d64ad7ba3ee26c44ef6b0d6f491e74f4c3","sha256:8fb2a3708338c67a5fa2f52fc96d4543bd001faf001740ef63766ff736ff9dce"],"state_sha256":"8d83ec727bff8bde9283933ce69e8c552cd3f544ba9c41057171c7ef338cc92a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eHBRy8lpUhrvvxsM+xI+SFBwAdOA6u8VgRiYvGOJ4RsN/CqlQ9UYQJs7E08o9uWZ+ZANVGGROYtj9cb0HAMSCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-05T09:21:24.053692Z","bundle_sha256":"867b95a0587595f989017a9deea5c971a91d5f91f15629137bb5fd815af74f92"}}