{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:ESSAAEPENLU42LSNLMYWBPO4DK","short_pith_number":"pith:ESSAAEPE","canonical_record":{"source":{"id":"2012.05407","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-12-10T01:55:56Z","cross_cats_sorted":[],"title_canon_sha256":"4636b8d0a9206cfb1ae3196211be3d0040eceb55d77306a16a5a0917e7707f2f","abstract_canon_sha256":"a0af18c42a0987966d0357eccdc6dd4982dc76d0f1a4f4264ecae868fed16bc1"},"schema_version":"1.0"},"canonical_sha256":"24a40011e46ae9cd2e4d5b3160bddc1a9841e461255664ef061fff722e1115b8","source":{"kind":"arxiv","id":"2012.05407","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2012.05407","created_at":"2026-07-05T02:04:49Z"},{"alias_kind":"arxiv_version","alias_value":"2012.05407v1","created_at":"2026-07-05T02:04:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2012.05407","created_at":"2026-07-05T02:04:49Z"},{"alias_kind":"pith_short_12","alias_value":"ESSAAEPENLU4","created_at":"2026-07-05T02:04:49Z"},{"alias_kind":"pith_short_16","alias_value":"ESSAAEPENLU42LSN","created_at":"2026-07-05T02:04:49Z"},{"alias_kind":"pith_short_8","alias_value":"ESSAAEPE","created_at":"2026-07-05T02:04:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:ESSAAEPENLU42LSNLMYWBPO4DK","target":"record","payload":{"canonical_record":{"source":{"id":"2012.05407","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-12-10T01:55:56Z","cross_cats_sorted":[],"title_canon_sha256":"4636b8d0a9206cfb1ae3196211be3d0040eceb55d77306a16a5a0917e7707f2f","abstract_canon_sha256":"a0af18c42a0987966d0357eccdc6dd4982dc76d0f1a4f4264ecae868fed16bc1"},"schema_version":"1.0"},"canonical_sha256":"24a40011e46ae9cd2e4d5b3160bddc1a9841e461255664ef061fff722e1115b8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:04:49.078136Z","signature_b64":"U3HXy6cBwyWVY4b3uWSDESbfZtASLOK6tKketnGCRlZZdXemTNTWuzxC4n5H26Rod1D0ZbwTvlrKt2R3DQSiAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"24a40011e46ae9cd2e4d5b3160bddc1a9841e461255664ef061fff722e1115b8","last_reissued_at":"2026-07-05T02:04:49.077767Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:04:49.077767Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2012.05407","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":"2026-07-05T02:04:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jGbVv7RGPRxD2wR+7I29ItiEoKhAdP63NRsrPbBHZViA9VyKP8RZlT8roGxNkVqvlMFSUtWwORNbh/n/wwAsCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-15T05:08:16.930095Z"},"content_sha256":"19d08b9096f6d682b8be44274b071927bd79b687b438ade1e1c26545c4ed7b28","schema_version":"1.0","event_id":"sha256:19d08b9096f6d682b8be44274b071927bd79b687b438ade1e1c26545c4ed7b28"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:ESSAAEPENLU42LSNLMYWBPO4DK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Magnetic field and chromospheric activity evolution of HD75332: a rapid magnetic cycle in an F star without a hot Jupiter","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. A. Vidotto, E. L. Brown, I. Millburn, J. Morin, J. N. Gonz\\'alez-P\\'erez, M. Jardine, M. Mittag, M. W. Mengel, P. Petit, S. C. Marsden, S. V. Jeffers, the Bcool Collaboration, V. See","submitted_at":"2020-12-10T01:55:56Z","abstract_excerpt":"Studying cool star magnetic activity gives an important insight into the stellar dynamo and its relationship with stellar properties, as well as allowing us to place the Sun's magnetism in the context of other stars. Only 61 Cyg A (K5V) and $\\tau$ Boo (F8V) are currently known to have magnetic cycles like the Sun's, where the large-scale magnetic field polarity reverses in phase with the star's chromospheric activity cycles. ${\\tau}$ Boo has a rapid $\\sim$240 d magnetic cycle, and it is not yet clear whether this is related to the star's thin convection zone or if the dynamo is accelerated by "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.05407","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/2012.05407/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":"2026-07-05T02:04:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5lplZna0uj7yh9q8do/fuf7oef5jFFOY6CcZtpym4s3IYucgJorI6MKAuXGTUurIXSt+UdbA1W1S4Qf4LAywAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-15T05:08:16.930487Z"},"content_sha256":"9836a7a1df092f16722efe95478f2d8798bf35cef245157c38d1073c914d8b62","schema_version":"1.0","event_id":"sha256:9836a7a1df092f16722efe95478f2d8798bf35cef245157c38d1073c914d8b62"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ESSAAEPENLU42LSNLMYWBPO4DK/bundle.json","state_url":"https://pith.science/pith/ESSAAEPENLU42LSNLMYWBPO4DK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ESSAAEPENLU42LSNLMYWBPO4DK/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":"2026-07-15T05:08:16Z","links":{"resolver":"https://pith.science/pith/ESSAAEPENLU42LSNLMYWBPO4DK","bundle":"https://pith.science/pith/ESSAAEPENLU42LSNLMYWBPO4DK/bundle.json","state":"https://pith.science/pith/ESSAAEPENLU42LSNLMYWBPO4DK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ESSAAEPENLU42LSNLMYWBPO4DK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:ESSAAEPENLU42LSNLMYWBPO4DK","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":"a0af18c42a0987966d0357eccdc6dd4982dc76d0f1a4f4264ecae868fed16bc1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-12-10T01:55:56Z","title_canon_sha256":"4636b8d0a9206cfb1ae3196211be3d0040eceb55d77306a16a5a0917e7707f2f"},"schema_version":"1.0","source":{"id":"2012.05407","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2012.05407","created_at":"2026-07-05T02:04:49Z"},{"alias_kind":"arxiv_version","alias_value":"2012.05407v1","created_at":"2026-07-05T02:04:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2012.05407","created_at":"2026-07-05T02:04:49Z"},{"alias_kind":"pith_short_12","alias_value":"ESSAAEPENLU4","created_at":"2026-07-05T02:04:49Z"},{"alias_kind":"pith_short_16","alias_value":"ESSAAEPENLU42LSN","created_at":"2026-07-05T02:04:49Z"},{"alias_kind":"pith_short_8","alias_value":"ESSAAEPE","created_at":"2026-07-05T02:04:49Z"}],"graph_snapshots":[{"event_id":"sha256:9836a7a1df092f16722efe95478f2d8798bf35cef245157c38d1073c914d8b62","target":"graph","created_at":"2026-07-05T02:04:49Z","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/2012.05407/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Studying cool star magnetic activity gives an important insight into the stellar dynamo and its relationship with stellar properties, as well as allowing us to place the Sun's magnetism in the context of other stars. Only 61 Cyg A (K5V) and $\\tau$ Boo (F8V) are currently known to have magnetic cycles like the Sun's, where the large-scale magnetic field polarity reverses in phase with the star's chromospheric activity cycles. ${\\tau}$ Boo has a rapid $\\sim$240 d magnetic cycle, and it is not yet clear whether this is related to the star's thin convection zone or if the dynamo is accelerated by ","authors_text":"A. A. Vidotto, E. L. Brown, I. Millburn, J. Morin, J. N. Gonz\\'alez-P\\'erez, M. Jardine, M. Mittag, M. W. Mengel, P. Petit, S. C. Marsden, S. V. Jeffers, the Bcool Collaboration, V. See","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-12-10T01:55:56Z","title":"Magnetic field and chromospheric activity evolution of HD75332: a rapid magnetic cycle in an F star without a hot Jupiter"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.05407","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":"sha256:19d08b9096f6d682b8be44274b071927bd79b687b438ade1e1c26545c4ed7b28","target":"record","created_at":"2026-07-05T02:04:49Z","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":"a0af18c42a0987966d0357eccdc6dd4982dc76d0f1a4f4264ecae868fed16bc1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2020-12-10T01:55:56Z","title_canon_sha256":"4636b8d0a9206cfb1ae3196211be3d0040eceb55d77306a16a5a0917e7707f2f"},"schema_version":"1.0","source":{"id":"2012.05407","kind":"arxiv","version":1}},"canonical_sha256":"24a40011e46ae9cd2e4d5b3160bddc1a9841e461255664ef061fff722e1115b8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"24a40011e46ae9cd2e4d5b3160bddc1a9841e461255664ef061fff722e1115b8","first_computed_at":"2026-07-05T02:04:49.077767Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:04:49.077767Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"U3HXy6cBwyWVY4b3uWSDESbfZtASLOK6tKketnGCRlZZdXemTNTWuzxC4n5H26Rod1D0ZbwTvlrKt2R3DQSiAw==","signature_status":"signed_v1","signed_at":"2026-07-05T02:04:49.078136Z","signed_message":"canonical_sha256_bytes"},"source_id":"2012.05407","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:19d08b9096f6d682b8be44274b071927bd79b687b438ade1e1c26545c4ed7b28","sha256:9836a7a1df092f16722efe95478f2d8798bf35cef245157c38d1073c914d8b62"],"state_sha256":"d6a5e5635716bf039e4b00083799336cc7a8714128718911eab22e58c778576a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dh1G5t916zkRh5sqrOWJeZPOrOg08Z8oH2LiX6bGF0KuItaKe9Zsi6ih/5qijKmu31AvejFbnphYxClLkF4aCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-15T05:08:16.932573Z","bundle_sha256":"b811fbddc4630c0da2d400cd1d7d4c9d0902868f9f42d984c873539320de0959"}}