{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:EKHVOQMF6277CK6YZOB7NE47GC","short_pith_number":"pith:EKHVOQMF","canonical_record":{"source":{"id":"2407.04475","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2024-07-05T12:50:01Z","cross_cats_sorted":[],"title_canon_sha256":"9c965e9bb4ef548e63a237af56412cd1aba4576746d488c385b8ad3210d9e24b","abstract_canon_sha256":"9e6d9c459d142331c4ed5bed530d658305bf02bd38f3db9f5399f038b914f8de"},"schema_version":"1.0"},"canonical_sha256":"228f574185f6bff12bd8cb83f6939f308e88baa9726a12dbd819b0c0844b095f","source":{"kind":"arxiv","id":"2407.04475","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2407.04475","created_at":"2026-07-05T08:40:34Z"},{"alias_kind":"arxiv_version","alias_value":"2407.04475v1","created_at":"2026-07-05T08:40:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2407.04475","created_at":"2026-07-05T08:40:34Z"},{"alias_kind":"pith_short_12","alias_value":"EKHVOQMF6277","created_at":"2026-07-05T08:40:34Z"},{"alias_kind":"pith_short_16","alias_value":"EKHVOQMF6277CK6Y","created_at":"2026-07-05T08:40:34Z"},{"alias_kind":"pith_short_8","alias_value":"EKHVOQMF","created_at":"2026-07-05T08:40:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:EKHVOQMF6277CK6YZOB7NE47GC","target":"record","payload":{"canonical_record":{"source":{"id":"2407.04475","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2024-07-05T12:50:01Z","cross_cats_sorted":[],"title_canon_sha256":"9c965e9bb4ef548e63a237af56412cd1aba4576746d488c385b8ad3210d9e24b","abstract_canon_sha256":"9e6d9c459d142331c4ed5bed530d658305bf02bd38f3db9f5399f038b914f8de"},"schema_version":"1.0"},"canonical_sha256":"228f574185f6bff12bd8cb83f6939f308e88baa9726a12dbd819b0c0844b095f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:40:34.158863Z","signature_b64":"UMb2lU0wwgR9U7laTaQwmBRwE8H0WZQmjZVj6lI5Ml3V2AoipJiROs7gQ9+IsqG82o1QmRGXYRsYrbFU3cciBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"228f574185f6bff12bd8cb83f6939f308e88baa9726a12dbd819b0c0844b095f","last_reissued_at":"2026-07-05T08:40:34.158286Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:40:34.158286Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2407.04475","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":"2026-07-05T08:40:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"m1Wjiy/4dj0i7Cf2IZKCT26c8Gzg9+zOe3fYVO4sxdN5cgjWI4a/w3WrsDjDqcy1FFAkpuaSPckiwhRWvlHdDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T00:11:14.041959Z"},"content_sha256":"2455919c3e6f29870f7dcbfa4297d16ce2f4a2543912abd735ee864520a89b04","schema_version":"1.0","event_id":"sha256:2455919c3e6f29870f7dcbfa4297d16ce2f4a2543912abd735ee864520a89b04"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:EKHVOQMF6277CK6YZOB7NE47GC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Relationship between TIGRE solar S-index and USET Ca II K full disk images","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"F. Clette, G. Rauw, G. Vanden Broeck, K.-P. Schr\\\"oder, M. Mittag, S. Bechet","submitted_at":"2024-07-05T12:50:01Z","abstract_excerpt":"Full disk observations of the solar chromosphere in the Ca II K line represent a valuable dataset for studies of solar magnetic activity. The S-index is widely used to investigate the magnetic activity of stars, however, its connection to the coverage of stellar magnetic structure is still poorly understood. We use the archives of full disk Ca II K images taken by the Royal Observatory of Belgium with the USET to derive the area fraction of the brightest chromospheric structures over the last decade. These data allowed us to study the end of the solar cycle 24 and the beginning of solar cycle "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2407.04475","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/2407.04475/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":"2026-07-05T08:40:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"j3+5HLjDBg6xjGUNvimMkf20kf/CRNjkpvfKycAkE8gK4/03Y2iJZ1Eyydpp096PDkrlPtGIg4pSna1Bhgo2DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T00:11:14.042339Z"},"content_sha256":"ba6a7d794fa731bf899b149507381ef18b86ed4379d4620b2ed43745ca4afc3b","schema_version":"1.0","event_id":"sha256:ba6a7d794fa731bf899b149507381ef18b86ed4379d4620b2ed43745ca4afc3b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EKHVOQMF6277CK6YZOB7NE47GC/bundle.json","state_url":"https://pith.science/pith/EKHVOQMF6277CK6YZOB7NE47GC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EKHVOQMF6277CK6YZOB7NE47GC/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":"2026-07-07T00:11:14Z","links":{"resolver":"https://pith.science/pith/EKHVOQMF6277CK6YZOB7NE47GC","bundle":"https://pith.science/pith/EKHVOQMF6277CK6YZOB7NE47GC/bundle.json","state":"https://pith.science/pith/EKHVOQMF6277CK6YZOB7NE47GC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EKHVOQMF6277CK6YZOB7NE47GC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:EKHVOQMF6277CK6YZOB7NE47GC","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":"9e6d9c459d142331c4ed5bed530d658305bf02bd38f3db9f5399f038b914f8de","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2024-07-05T12:50:01Z","title_canon_sha256":"9c965e9bb4ef548e63a237af56412cd1aba4576746d488c385b8ad3210d9e24b"},"schema_version":"1.0","source":{"id":"2407.04475","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2407.04475","created_at":"2026-07-05T08:40:34Z"},{"alias_kind":"arxiv_version","alias_value":"2407.04475v1","created_at":"2026-07-05T08:40:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2407.04475","created_at":"2026-07-05T08:40:34Z"},{"alias_kind":"pith_short_12","alias_value":"EKHVOQMF6277","created_at":"2026-07-05T08:40:34Z"},{"alias_kind":"pith_short_16","alias_value":"EKHVOQMF6277CK6Y","created_at":"2026-07-05T08:40:34Z"},{"alias_kind":"pith_short_8","alias_value":"EKHVOQMF","created_at":"2026-07-05T08:40:34Z"}],"graph_snapshots":[{"event_id":"sha256:ba6a7d794fa731bf899b149507381ef18b86ed4379d4620b2ed43745ca4afc3b","target":"graph","created_at":"2026-07-05T08:40:34Z","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/2407.04475/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Full disk observations of the solar chromosphere in the Ca II K line represent a valuable dataset for studies of solar magnetic activity. The S-index is widely used to investigate the magnetic activity of stars, however, its connection to the coverage of stellar magnetic structure is still poorly understood. We use the archives of full disk Ca II K images taken by the Royal Observatory of Belgium with the USET to derive the area fraction of the brightest chromospheric structures over the last decade. These data allowed us to study the end of the solar cycle 24 and the beginning of solar cycle ","authors_text":"F. Clette, G. Rauw, G. Vanden Broeck, K.-P. Schr\\\"oder, M. Mittag, S. Bechet","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2024-07-05T12:50:01Z","title":"Relationship between TIGRE solar S-index and USET Ca II K full disk images"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2407.04475","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":"sha256:2455919c3e6f29870f7dcbfa4297d16ce2f4a2543912abd735ee864520a89b04","target":"record","created_at":"2026-07-05T08:40:34Z","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":"9e6d9c459d142331c4ed5bed530d658305bf02bd38f3db9f5399f038b914f8de","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2024-07-05T12:50:01Z","title_canon_sha256":"9c965e9bb4ef548e63a237af56412cd1aba4576746d488c385b8ad3210d9e24b"},"schema_version":"1.0","source":{"id":"2407.04475","kind":"arxiv","version":1}},"canonical_sha256":"228f574185f6bff12bd8cb83f6939f308e88baa9726a12dbd819b0c0844b095f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"228f574185f6bff12bd8cb83f6939f308e88baa9726a12dbd819b0c0844b095f","first_computed_at":"2026-07-05T08:40:34.158286Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:40:34.158286Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"UMb2lU0wwgR9U7laTaQwmBRwE8H0WZQmjZVj6lI5Ml3V2AoipJiROs7gQ9+IsqG82o1QmRGXYRsYrbFU3cciBw==","signature_status":"signed_v1","signed_at":"2026-07-05T08:40:34.158863Z","signed_message":"canonical_sha256_bytes"},"source_id":"2407.04475","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2455919c3e6f29870f7dcbfa4297d16ce2f4a2543912abd735ee864520a89b04","sha256:ba6a7d794fa731bf899b149507381ef18b86ed4379d4620b2ed43745ca4afc3b"],"state_sha256":"e642ee26423b6dedb1303c82623a195f9bfcd1b4216465d5b123fb1f021b70a9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rFtbaw57TVtV2PbJKjsjalHqwASWvnPjgr8yA0/sJjb3lDnjC3+904ScWZyRy12eLmdiRdg1fpMDfsnVR40KBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T00:11:14.044210Z","bundle_sha256":"0304d3ef4771a26a8e3a245f30c839f3917f5826e6df913de502ccdde101d097"}}