{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:B4HW4MMVGXLAXSCGSQBGXXPF5K","short_pith_number":"pith:B4HW4MMV","canonical_record":{"source":{"id":"1511.08548","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-11-27T03:15:42Z","cross_cats_sorted":[],"title_canon_sha256":"6482b3218b0344663a848b607ae3264786dc90573814f12611cb759fc9efa749","abstract_canon_sha256":"f4480e43a299b992c2110cef3ac852aa7b890db59910ddcc614e7c7c34a50772"},"schema_version":"1.0"},"canonical_sha256":"0f0f6e319535d60bc84694026bdde5ea9d3f20163d37febfdaf17879f122c604","source":{"kind":"arxiv","id":"1511.08548","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1511.08548","created_at":"2026-05-18T01:25:53Z"},{"alias_kind":"arxiv_version","alias_value":"1511.08548v1","created_at":"2026-05-18T01:25:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1511.08548","created_at":"2026-05-18T01:25:53Z"},{"alias_kind":"pith_short_12","alias_value":"B4HW4MMVGXLA","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_16","alias_value":"B4HW4MMVGXLAXSCG","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_8","alias_value":"B4HW4MMV","created_at":"2026-05-18T12:29:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:B4HW4MMVGXLAXSCGSQBGXXPF5K","target":"record","payload":{"canonical_record":{"source":{"id":"1511.08548","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-11-27T03:15:42Z","cross_cats_sorted":[],"title_canon_sha256":"6482b3218b0344663a848b607ae3264786dc90573814f12611cb759fc9efa749","abstract_canon_sha256":"f4480e43a299b992c2110cef3ac852aa7b890db59910ddcc614e7c7c34a50772"},"schema_version":"1.0"},"canonical_sha256":"0f0f6e319535d60bc84694026bdde5ea9d3f20163d37febfdaf17879f122c604","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:25:53.814945Z","signature_b64":"mc9yZrgD+XjBp0yZi8mU3lx8rL+78ACIjdIp0vaOQ9BBfRIV8JCSYyWRGXLjGJDDXAy1ifDJhakY/OpBORPJCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0f0f6e319535d60bc84694026bdde5ea9d3f20163d37febfdaf17879f122c604","last_reissued_at":"2026-05-18T01:25:53.814448Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:25:53.814448Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1511.08548","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":"2026-05-18T01:25:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Bh0pnbT3Ne3RmWEFSeVX+msP54p8mx+NA3jmHE1chnX3bK6eZE9ZbTJMrBB10o8PquCxs7JFrdeeJ7HQOcerDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T08:07:40.164438Z"},"content_sha256":"65fdc6de025addcddaccf154faf4a7dffd962401abcb812c6c85a1b7bd4522b2","schema_version":"1.0","event_id":"sha256:65fdc6de025addcddaccf154faf4a7dffd962401abcb812c6c85a1b7bd4522b2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:B4HW4MMVGXLAXSCGSQBGXXPF5K","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A coupled 2$\\times$2D Babcock-Leighton solar dynamo model. I. Surface magnetic flux evolution","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Alexandre Lemerle, Arnaud Carignan-Dugas, Paul Charbonneau","submitted_at":"2015-11-27T03:15:42Z","abstract_excerpt":"The need for reliable predictions of the solar activity cycle motivates the development of dynamo models incorporating a representation of surface processes sufficiently detailed to allow assimilation of magnetographic data. In this series of papers we present one such dynamo model, and document its behavior and properties. This first paper focuses on one of the model's key components, namely surface magnetic flux evolution. Using a genetic algorithm, we obtain best-fit parameters of the transport model by least-squares minimization of the differences between the associated synthetic synoptic "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.08548","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":"2026-05-18T01:25:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aa+7lbZOPAN3BlEAQxMgYsUUSP9HYdeq7xHXUBj7BKpJWiT6QLQCWBbS2P04sjkDn010NP3uZI0DRe2sBKJQDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T08:07:40.164785Z"},"content_sha256":"f2bdfd85e4bcadbda0e5eaabac52a064cea17ee2cae002bc80d261b9098bf0a8","schema_version":"1.0","event_id":"sha256:f2bdfd85e4bcadbda0e5eaabac52a064cea17ee2cae002bc80d261b9098bf0a8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/B4HW4MMVGXLAXSCGSQBGXXPF5K/bundle.json","state_url":"https://pith.science/pith/B4HW4MMVGXLAXSCGSQBGXXPF5K/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/B4HW4MMVGXLAXSCGSQBGXXPF5K/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":"2026-06-24T08:07:40Z","links":{"resolver":"https://pith.science/pith/B4HW4MMVGXLAXSCGSQBGXXPF5K","bundle":"https://pith.science/pith/B4HW4MMVGXLAXSCGSQBGXXPF5K/bundle.json","state":"https://pith.science/pith/B4HW4MMVGXLAXSCGSQBGXXPF5K/state.json","well_known_bundle":"https://pith.science/.well-known/pith/B4HW4MMVGXLAXSCGSQBGXXPF5K/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:B4HW4MMVGXLAXSCGSQBGXXPF5K","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":"f4480e43a299b992c2110cef3ac852aa7b890db59910ddcc614e7c7c34a50772","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-11-27T03:15:42Z","title_canon_sha256":"6482b3218b0344663a848b607ae3264786dc90573814f12611cb759fc9efa749"},"schema_version":"1.0","source":{"id":"1511.08548","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1511.08548","created_at":"2026-05-18T01:25:53Z"},{"alias_kind":"arxiv_version","alias_value":"1511.08548v1","created_at":"2026-05-18T01:25:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1511.08548","created_at":"2026-05-18T01:25:53Z"},{"alias_kind":"pith_short_12","alias_value":"B4HW4MMVGXLA","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_16","alias_value":"B4HW4MMVGXLAXSCG","created_at":"2026-05-18T12:29:14Z"},{"alias_kind":"pith_short_8","alias_value":"B4HW4MMV","created_at":"2026-05-18T12:29:14Z"}],"graph_snapshots":[{"event_id":"sha256:f2bdfd85e4bcadbda0e5eaabac52a064cea17ee2cae002bc80d261b9098bf0a8","target":"graph","created_at":"2026-05-18T01:25:53Z","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":"The need for reliable predictions of the solar activity cycle motivates the development of dynamo models incorporating a representation of surface processes sufficiently detailed to allow assimilation of magnetographic data. In this series of papers we present one such dynamo model, and document its behavior and properties. This first paper focuses on one of the model's key components, namely surface magnetic flux evolution. Using a genetic algorithm, we obtain best-fit parameters of the transport model by least-squares minimization of the differences between the associated synthetic synoptic ","authors_text":"Alexandre Lemerle, Arnaud Carignan-Dugas, Paul Charbonneau","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-11-27T03:15:42Z","title":"A coupled 2$\\times$2D Babcock-Leighton solar dynamo model. I. Surface magnetic flux evolution"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.08548","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":"sha256:65fdc6de025addcddaccf154faf4a7dffd962401abcb812c6c85a1b7bd4522b2","target":"record","created_at":"2026-05-18T01:25:53Z","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":"f4480e43a299b992c2110cef3ac852aa7b890db59910ddcc614e7c7c34a50772","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-11-27T03:15:42Z","title_canon_sha256":"6482b3218b0344663a848b607ae3264786dc90573814f12611cb759fc9efa749"},"schema_version":"1.0","source":{"id":"1511.08548","kind":"arxiv","version":1}},"canonical_sha256":"0f0f6e319535d60bc84694026bdde5ea9d3f20163d37febfdaf17879f122c604","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0f0f6e319535d60bc84694026bdde5ea9d3f20163d37febfdaf17879f122c604","first_computed_at":"2026-05-18T01:25:53.814448Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:25:53.814448Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mc9yZrgD+XjBp0yZi8mU3lx8rL+78ACIjdIp0vaOQ9BBfRIV8JCSYyWRGXLjGJDDXAy1ifDJhakY/OpBORPJCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:25:53.814945Z","signed_message":"canonical_sha256_bytes"},"source_id":"1511.08548","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:65fdc6de025addcddaccf154faf4a7dffd962401abcb812c6c85a1b7bd4522b2","sha256:f2bdfd85e4bcadbda0e5eaabac52a064cea17ee2cae002bc80d261b9098bf0a8"],"state_sha256":"96ac143b877c795222623d5871a97144932dd876d82fb0e2c519d4d91ab17375"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/7RZ+xISSUX8U7HS4lEglveThuJZsiHcTbfNZ2HMnOlG2rCMD/qFZ4DdGoz/cg4rdWTJ3UThbAEzkMl2wm0VDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-24T08:07:40.166775Z","bundle_sha256":"3da09a1eb2baad9211aa40fab4cda786c9cc15ac385571220fc55b3ac40faba2"}}