{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:OTWXMDFTWK6Y7ROJVSKRL77O3U","short_pith_number":"pith:OTWXMDFT","canonical_record":{"source":{"id":"1804.02833","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-09T06:22:07Z","cross_cats_sorted":[],"title_canon_sha256":"dca1666c47fd82426e5d35f60529e004d9a00d1a1798396f9273f414ef8778a5","abstract_canon_sha256":"eae3872481ce224867ff338110b9c3275204ad110d414170b1e41300b7af602e"},"schema_version":"1.0"},"canonical_sha256":"74ed760cb3b2bd8fc5c9ac9515ffeedd201ce994bc96854c20cd8b7fcf2a86c4","source":{"kind":"arxiv","id":"1804.02833","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.02833","created_at":"2026-05-18T00:10:31Z"},{"alias_kind":"arxiv_version","alias_value":"1804.02833v2","created_at":"2026-05-18T00:10:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.02833","created_at":"2026-05-18T00:10:31Z"},{"alias_kind":"pith_short_12","alias_value":"OTWXMDFTWK6Y","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_16","alias_value":"OTWXMDFTWK6Y7ROJ","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_8","alias_value":"OTWXMDFT","created_at":"2026-05-18T12:32:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:OTWXMDFTWK6Y7ROJVSKRL77O3U","target":"record","payload":{"canonical_record":{"source":{"id":"1804.02833","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-09T06:22:07Z","cross_cats_sorted":[],"title_canon_sha256":"dca1666c47fd82426e5d35f60529e004d9a00d1a1798396f9273f414ef8778a5","abstract_canon_sha256":"eae3872481ce224867ff338110b9c3275204ad110d414170b1e41300b7af602e"},"schema_version":"1.0"},"canonical_sha256":"74ed760cb3b2bd8fc5c9ac9515ffeedd201ce994bc96854c20cd8b7fcf2a86c4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:10:31.383134Z","signature_b64":"GsIOpjFvWQydPR2Gs7MVgPDIymsS4vzG9nGsGQkJO5aDgjtNmMGCEZ/mh6qpaI8Nd5orBBKggy+y7G7/9lDqAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"74ed760cb3b2bd8fc5c9ac9515ffeedd201ce994bc96854c20cd8b7fcf2a86c4","last_reissued_at":"2026-05-18T00:10:31.382382Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:10:31.382382Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1804.02833","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:10:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9KOw9bOkxxnuftpfudGjOiennnfgXdQ/d/GEJpnx8AsRRtPl/4xcngjhl5eTTVZIrviV2wbFHecE8i+Cb0LLAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T04:29:54.850065Z"},"content_sha256":"e979048641273bcb145c6fbd537f3c19fa57998ec44848c0ec883c96d36475d8","schema_version":"1.0","event_id":"sha256:e979048641273bcb145c6fbd537f3c19fa57998ec44848c0ec883c96d36475d8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:OTWXMDFTWK6Y7ROJVSKRL77O3U","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Modelling variability of solar activity cycles","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. A. Nepomnyashchikh, A. V. Mordvinov, L. L. Kitchatinov","submitted_at":"2018-04-09T06:22:07Z","abstract_excerpt":"Context. Solar activity cycles vary in amplitude and duration. The variations can be at least partly explained by fluctuations in dynamo parameters. Aims. We want to restrict uncertainty in fluctuating dynamo parameters and find out which properties of the fluctuations control the amplitudes of the magnetic field and energy in variable dynamo cycles. Methods. A flux-transport model for the solar dynamo with fluctuations of the Babcock-Leighton type $\\alpha$-effect was applied to generate statistics of magnetic cycles for our purposes. The statistics were compared with data on solar cycle perio"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.02833","kind":"arxiv","version":2},"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":"2026-05-18T00:10:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WmHF3cScKDM7lG+XqTe6UZtTcGibTE49GQsPr5VqknPy3pCSwzhTaD6K2AoTpI7pxm3IlGwS1dKQfSCmQH6zBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T04:29:54.850787Z"},"content_sha256":"2a6e02d2702c5fb6f83cc5bfcf34088e3c3a40aeb1f6d00207738391ab1872bf","schema_version":"1.0","event_id":"sha256:2a6e02d2702c5fb6f83cc5bfcf34088e3c3a40aeb1f6d00207738391ab1872bf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OTWXMDFTWK6Y7ROJVSKRL77O3U/bundle.json","state_url":"https://pith.science/pith/OTWXMDFTWK6Y7ROJVSKRL77O3U/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OTWXMDFTWK6Y7ROJVSKRL77O3U/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":"2026-06-09T04:29:54Z","links":{"resolver":"https://pith.science/pith/OTWXMDFTWK6Y7ROJVSKRL77O3U","bundle":"https://pith.science/pith/OTWXMDFTWK6Y7ROJVSKRL77O3U/bundle.json","state":"https://pith.science/pith/OTWXMDFTWK6Y7ROJVSKRL77O3U/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OTWXMDFTWK6Y7ROJVSKRL77O3U/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:OTWXMDFTWK6Y7ROJVSKRL77O3U","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":"eae3872481ce224867ff338110b9c3275204ad110d414170b1e41300b7af602e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-09T06:22:07Z","title_canon_sha256":"dca1666c47fd82426e5d35f60529e004d9a00d1a1798396f9273f414ef8778a5"},"schema_version":"1.0","source":{"id":"1804.02833","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.02833","created_at":"2026-05-18T00:10:31Z"},{"alias_kind":"arxiv_version","alias_value":"1804.02833v2","created_at":"2026-05-18T00:10:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.02833","created_at":"2026-05-18T00:10:31Z"},{"alias_kind":"pith_short_12","alias_value":"OTWXMDFTWK6Y","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_16","alias_value":"OTWXMDFTWK6Y7ROJ","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_8","alias_value":"OTWXMDFT","created_at":"2026-05-18T12:32:43Z"}],"graph_snapshots":[{"event_id":"sha256:2a6e02d2702c5fb6f83cc5bfcf34088e3c3a40aeb1f6d00207738391ab1872bf","target":"graph","created_at":"2026-05-18T00:10:31Z","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. Solar activity cycles vary in amplitude and duration. The variations can be at least partly explained by fluctuations in dynamo parameters. Aims. We want to restrict uncertainty in fluctuating dynamo parameters and find out which properties of the fluctuations control the amplitudes of the magnetic field and energy in variable dynamo cycles. Methods. A flux-transport model for the solar dynamo with fluctuations of the Babcock-Leighton type $\\alpha$-effect was applied to generate statistics of magnetic cycles for our purposes. The statistics were compared with data on solar cycle perio","authors_text":"A. A. Nepomnyashchikh, A. V. Mordvinov, L. L. Kitchatinov","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-09T06:22:07Z","title":"Modelling variability of solar activity cycles"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.02833","kind":"arxiv","version":2},"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:e979048641273bcb145c6fbd537f3c19fa57998ec44848c0ec883c96d36475d8","target":"record","created_at":"2026-05-18T00:10:31Z","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":"eae3872481ce224867ff338110b9c3275204ad110d414170b1e41300b7af602e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-09T06:22:07Z","title_canon_sha256":"dca1666c47fd82426e5d35f60529e004d9a00d1a1798396f9273f414ef8778a5"},"schema_version":"1.0","source":{"id":"1804.02833","kind":"arxiv","version":2}},"canonical_sha256":"74ed760cb3b2bd8fc5c9ac9515ffeedd201ce994bc96854c20cd8b7fcf2a86c4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"74ed760cb3b2bd8fc5c9ac9515ffeedd201ce994bc96854c20cd8b7fcf2a86c4","first_computed_at":"2026-05-18T00:10:31.382382Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:10:31.382382Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GsIOpjFvWQydPR2Gs7MVgPDIymsS4vzG9nGsGQkJO5aDgjtNmMGCEZ/mh6qpaI8Nd5orBBKggy+y7G7/9lDqAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:10:31.383134Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.02833","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e979048641273bcb145c6fbd537f3c19fa57998ec44848c0ec883c96d36475d8","sha256:2a6e02d2702c5fb6f83cc5bfcf34088e3c3a40aeb1f6d00207738391ab1872bf"],"state_sha256":"dbfc3580b46b2daa5a139adc02beb0497495bd5e7d96da857336b5103087c6ee"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lxr50k1pSrXQFTb8z56Sgidail7CfQC98mi6MDCKFmBmdiHAKrK+Zo5kmuH5NL/N9lg83tkX/brFK1WG/ivMDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T04:29:54.854780Z","bundle_sha256":"7e35eb286b049fbc7ad9104d1807e0478a5501e3eb91f8f096bea90a1bd5283d"}}