{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:HMGHSZG4I6RKFSNPP4JMJYMURK","short_pith_number":"pith:HMGHSZG4","canonical_record":{"source":{"id":"1901.03441","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-01-11T00:36:46Z","cross_cats_sorted":[],"title_canon_sha256":"52717e8d40953249d397a2e804f597dc02bc85f3e0b340ef2a9bbc8cb3bf6227","abstract_canon_sha256":"3402f89f2e1a360c156040e0b91688b5b844dee2909ca9589c08bbc5fa0ee6cc"},"schema_version":"1.0"},"canonical_sha256":"3b0c7964dc47a2a2c9af7f12c4e1948abf2b4bcb483526ddec7af26cb2f748a4","source":{"kind":"arxiv","id":"1901.03441","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.03441","created_at":"2026-05-17T23:53:22Z"},{"alias_kind":"arxiv_version","alias_value":"1901.03441v1","created_at":"2026-05-17T23:53:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.03441","created_at":"2026-05-17T23:53:22Z"},{"alias_kind":"pith_short_12","alias_value":"HMGHSZG4I6RK","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_16","alias_value":"HMGHSZG4I6RKFSNP","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_8","alias_value":"HMGHSZG4","created_at":"2026-05-18T12:33:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:HMGHSZG4I6RKFSNPP4JMJYMURK","target":"record","payload":{"canonical_record":{"source":{"id":"1901.03441","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-01-11T00:36:46Z","cross_cats_sorted":[],"title_canon_sha256":"52717e8d40953249d397a2e804f597dc02bc85f3e0b340ef2a9bbc8cb3bf6227","abstract_canon_sha256":"3402f89f2e1a360c156040e0b91688b5b844dee2909ca9589c08bbc5fa0ee6cc"},"schema_version":"1.0"},"canonical_sha256":"3b0c7964dc47a2a2c9af7f12c4e1948abf2b4bcb483526ddec7af26cb2f748a4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:53:22.929971Z","signature_b64":"izBXrguQ5Xx7pJ0xL891sGlL04exjdUNooROvVzd4lE9kFVd3EVW0MaZxy17Ui8ZhxZ4pO8w/FV+b0vb5LyaCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3b0c7964dc47a2a2c9af7f12c4e1948abf2b4bcb483526ddec7af26cb2f748a4","last_reissued_at":"2026-05-17T23:53:22.929239Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:53:22.929239Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1901.03441","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":"2026-05-17T23:53:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wTy631QBEaCRsCo90rrGGWvNHaTtEPYkvK9AlqyTg5G7n97NsaAQGPk6Gjdppo5qeDfOazYZnjlbbDvfc839Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T22:33:30.264364Z"},"content_sha256":"e3fcaa1832ccd527b6613f71a53dd721f401a6c52c30a40c46726903276998bf","schema_version":"1.0","event_id":"sha256:e3fcaa1832ccd527b6613f71a53dd721f401a6c52c30a40c46726903276998bf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:HMGHSZG4I6RKFSNPP4JMJYMURK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Infrequent Occurrence of Significant Linear Polarization in H$\\alpha$ Solar Flares","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Tomoko Kawate, Yoichiro Hanaoka","submitted_at":"2019-01-11T00:36:46Z","abstract_excerpt":"We performed statistical and event studies of linear polarization in the H$\\alpha$ line during solar flares. The statistical study revealed that, among 71 H$\\alpha$ flares analyzed, including 64 GOES flares, only one event shows significant linear polarization signals. Such an infrequent occurrence of significant linear polarization in solar flares is consistent with the result by Bianda et al. (2005), who studied 30 flares and found no polarization signals. In the event showing the significant polarization, the maximum degree of linear polarization was 1.16$\\pm$0.06\\%, and the average directi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.03441","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":"2026-05-17T23:53:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kxWx0vbeQYl5mebk/FxIcBGzRbrfexcGZtNYwDBHHSaIOBTwMMgFQxgX1PgsKxLOr4iAGEm6zgXlKcqrdeV4AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T22:33:30.264730Z"},"content_sha256":"3b094f07ac42f97886e84163293ff9cd47bfea6984319d0ab04d27a1366b0abd","schema_version":"1.0","event_id":"sha256:3b094f07ac42f97886e84163293ff9cd47bfea6984319d0ab04d27a1366b0abd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HMGHSZG4I6RKFSNPP4JMJYMURK/bundle.json","state_url":"https://pith.science/pith/HMGHSZG4I6RKFSNPP4JMJYMURK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HMGHSZG4I6RKFSNPP4JMJYMURK/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":"2026-05-30T22:33:30Z","links":{"resolver":"https://pith.science/pith/HMGHSZG4I6RKFSNPP4JMJYMURK","bundle":"https://pith.science/pith/HMGHSZG4I6RKFSNPP4JMJYMURK/bundle.json","state":"https://pith.science/pith/HMGHSZG4I6RKFSNPP4JMJYMURK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HMGHSZG4I6RKFSNPP4JMJYMURK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:HMGHSZG4I6RKFSNPP4JMJYMURK","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":"3402f89f2e1a360c156040e0b91688b5b844dee2909ca9589c08bbc5fa0ee6cc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-01-11T00:36:46Z","title_canon_sha256":"52717e8d40953249d397a2e804f597dc02bc85f3e0b340ef2a9bbc8cb3bf6227"},"schema_version":"1.0","source":{"id":"1901.03441","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.03441","created_at":"2026-05-17T23:53:22Z"},{"alias_kind":"arxiv_version","alias_value":"1901.03441v1","created_at":"2026-05-17T23:53:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.03441","created_at":"2026-05-17T23:53:22Z"},{"alias_kind":"pith_short_12","alias_value":"HMGHSZG4I6RK","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_16","alias_value":"HMGHSZG4I6RKFSNP","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_8","alias_value":"HMGHSZG4","created_at":"2026-05-18T12:33:18Z"}],"graph_snapshots":[{"event_id":"sha256:3b094f07ac42f97886e84163293ff9cd47bfea6984319d0ab04d27a1366b0abd","target":"graph","created_at":"2026-05-17T23:53:22Z","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 performed statistical and event studies of linear polarization in the H$\\alpha$ line during solar flares. The statistical study revealed that, among 71 H$\\alpha$ flares analyzed, including 64 GOES flares, only one event shows significant linear polarization signals. Such an infrequent occurrence of significant linear polarization in solar flares is consistent with the result by Bianda et al. (2005), who studied 30 flares and found no polarization signals. In the event showing the significant polarization, the maximum degree of linear polarization was 1.16$\\pm$0.06\\%, and the average directi","authors_text":"Tomoko Kawate, Yoichiro Hanaoka","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-01-11T00:36:46Z","title":"Infrequent Occurrence of Significant Linear Polarization in H$\\alpha$ Solar Flares"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.03441","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:e3fcaa1832ccd527b6613f71a53dd721f401a6c52c30a40c46726903276998bf","target":"record","created_at":"2026-05-17T23:53:22Z","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":"3402f89f2e1a360c156040e0b91688b5b844dee2909ca9589c08bbc5fa0ee6cc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-01-11T00:36:46Z","title_canon_sha256":"52717e8d40953249d397a2e804f597dc02bc85f3e0b340ef2a9bbc8cb3bf6227"},"schema_version":"1.0","source":{"id":"1901.03441","kind":"arxiv","version":1}},"canonical_sha256":"3b0c7964dc47a2a2c9af7f12c4e1948abf2b4bcb483526ddec7af26cb2f748a4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3b0c7964dc47a2a2c9af7f12c4e1948abf2b4bcb483526ddec7af26cb2f748a4","first_computed_at":"2026-05-17T23:53:22.929239Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:53:22.929239Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"izBXrguQ5Xx7pJ0xL891sGlL04exjdUNooROvVzd4lE9kFVd3EVW0MaZxy17Ui8ZhxZ4pO8w/FV+b0vb5LyaCw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:53:22.929971Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.03441","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e3fcaa1832ccd527b6613f71a53dd721f401a6c52c30a40c46726903276998bf","sha256:3b094f07ac42f97886e84163293ff9cd47bfea6984319d0ab04d27a1366b0abd"],"state_sha256":"2dc7638069023b31e5e229f6a6af12c590ca9032bf47c1b302ccf01ed1af10d3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Bn60I5IzK+dSwNBMBBByBkfM3l963u6SSOiaH1b+YpFig9Jqwtb/y2Am30tNEN5OdaQhTHg1PVJzsMui10xHDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T22:33:30.267000Z","bundle_sha256":"166ef93f9f3273e389bb2659b4a38f3c15cef1a6be5245ce13cba4fbc2256d8c"}}