{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:LKFK6LGKYVNCZR6QUVX5TA6RZD","short_pith_number":"pith:LKFK6LGK","canonical_record":{"source":{"id":"2305.02407","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2023-05-03T20:01:15Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"693c555e693fe10573ab8f0550bf3226eb37e689fd02b64d8d347f7d20c6ee48","abstract_canon_sha256":"24b8165c176786b1fc9d611089dfc09fd6cced4a2514a1d405061738173cc626"},"schema_version":"1.0"},"canonical_sha256":"5a8aaf2ccac55a2cc7d0a56fd983d1c8fbfa42c77eb740cd55bd344a1798bbd0","source":{"kind":"arxiv","id":"2305.02407","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2305.02407","created_at":"2026-07-05T09:14:16Z"},{"alias_kind":"arxiv_version","alias_value":"2305.02407v3","created_at":"2026-07-05T09:14:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2305.02407","created_at":"2026-07-05T09:14:16Z"},{"alias_kind":"pith_short_12","alias_value":"LKFK6LGKYVNC","created_at":"2026-07-05T09:14:16Z"},{"alias_kind":"pith_short_16","alias_value":"LKFK6LGKYVNCZR6Q","created_at":"2026-07-05T09:14:16Z"},{"alias_kind":"pith_short_8","alias_value":"LKFK6LGK","created_at":"2026-07-05T09:14:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:LKFK6LGKYVNCZR6QUVX5TA6RZD","target":"record","payload":{"canonical_record":{"source":{"id":"2305.02407","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2023-05-03T20:01:15Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"693c555e693fe10573ab8f0550bf3226eb37e689fd02b64d8d347f7d20c6ee48","abstract_canon_sha256":"24b8165c176786b1fc9d611089dfc09fd6cced4a2514a1d405061738173cc626"},"schema_version":"1.0"},"canonical_sha256":"5a8aaf2ccac55a2cc7d0a56fd983d1c8fbfa42c77eb740cd55bd344a1798bbd0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T09:14:16.541633Z","signature_b64":"8q2X9i6oleHYXOBg9jc7Izzpv7w1mC+vHvmxtg6suFYqMp1Dz/lC0LU1g1o19eBfarJFk2CaV6ievuyKlmrGAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5a8aaf2ccac55a2cc7d0a56fd983d1c8fbfa42c77eb740cd55bd344a1798bbd0","last_reissued_at":"2026-07-05T09:14:16.541088Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T09:14:16.541088Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2305.02407","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T09:14:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gC0xJUDi19NwSZ/xNBNLVQDnNA032OSCyvJ+NtWzJDOX+kGCfELpuqWr9VnAZIp8OGlfGp/3FGfyR2iWHTf+DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T11:40:18.084287Z"},"content_sha256":"d4af386a48fbb7cb3d7aa4c47ffc1d4da3363460dd5556b07a72ec1557f72dc9","schema_version":"1.0","event_id":"sha256:d4af386a48fbb7cb3d7aa4c47ffc1d4da3363460dd5556b07a72ec1557f72dc9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:LKFK6LGKYVNCZR6QUVX5TA6RZD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Predicting Stellar Rotation Periods Using XGBoost","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.SR","authors_text":"Fabio Del Sordo, Lu\\'is Torgo, Nuno R. C. Gomes","submitted_at":"2023-05-03T20:01:15Z","abstract_excerpt":"This work aims to develop a computationally inexpensive approach, based on machine learning techniques, to accurately predict thousands of stellar rotation periods. The innovation in our approach is the use of the XGBoost algorithm to predict the rotation periods of Kepler targets by means of regression analysis. Therefore, we focused on building a robust supervised machine learning model to predict surface stellar rotation periods from structured data sets built from the Kepler catalogue of K and M stars. We analysed the set of independent variables extracted from Kepler light curves and inve"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2305.02407","kind":"arxiv","version":3},"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/2305.02407/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":"2026-07-05T09:14:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VLcPKQs6x8lu/wCBKM3RxU3qfiyc6egHwyLI6+V6p9uQzs8Afag8/ibxfi6/wfZ19rOjZ/KxYY2WfM2odmNGCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T11:40:18.085025Z"},"content_sha256":"28e28eb4910ec3026fd704f108df93022886cfe0381bd23c0e7fe4241feddfa6","schema_version":"1.0","event_id":"sha256:28e28eb4910ec3026fd704f108df93022886cfe0381bd23c0e7fe4241feddfa6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LKFK6LGKYVNCZR6QUVX5TA6RZD/bundle.json","state_url":"https://pith.science/pith/LKFK6LGKYVNCZR6QUVX5TA6RZD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LKFK6LGKYVNCZR6QUVX5TA6RZD/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":"2026-08-21T11:40:18Z","links":{"resolver":"https://pith.science/pith/LKFK6LGKYVNCZR6QUVX5TA6RZD","bundle":"https://pith.science/pith/LKFK6LGKYVNCZR6QUVX5TA6RZD/bundle.json","state":"https://pith.science/pith/LKFK6LGKYVNCZR6QUVX5TA6RZD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LKFK6LGKYVNCZR6QUVX5TA6RZD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:LKFK6LGKYVNCZR6QUVX5TA6RZD","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":"24b8165c176786b1fc9d611089dfc09fd6cced4a2514a1d405061738173cc626","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2023-05-03T20:01:15Z","title_canon_sha256":"693c555e693fe10573ab8f0550bf3226eb37e689fd02b64d8d347f7d20c6ee48"},"schema_version":"1.0","source":{"id":"2305.02407","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2305.02407","created_at":"2026-07-05T09:14:16Z"},{"alias_kind":"arxiv_version","alias_value":"2305.02407v3","created_at":"2026-07-05T09:14:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2305.02407","created_at":"2026-07-05T09:14:16Z"},{"alias_kind":"pith_short_12","alias_value":"LKFK6LGKYVNC","created_at":"2026-07-05T09:14:16Z"},{"alias_kind":"pith_short_16","alias_value":"LKFK6LGKYVNCZR6Q","created_at":"2026-07-05T09:14:16Z"},{"alias_kind":"pith_short_8","alias_value":"LKFK6LGK","created_at":"2026-07-05T09:14:16Z"}],"graph_snapshots":[{"event_id":"sha256:28e28eb4910ec3026fd704f108df93022886cfe0381bd23c0e7fe4241feddfa6","target":"graph","created_at":"2026-07-05T09:14:16Z","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/2305.02407/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This work aims to develop a computationally inexpensive approach, based on machine learning techniques, to accurately predict thousands of stellar rotation periods. The innovation in our approach is the use of the XGBoost algorithm to predict the rotation periods of Kepler targets by means of regression analysis. Therefore, we focused on building a robust supervised machine learning model to predict surface stellar rotation periods from structured data sets built from the Kepler catalogue of K and M stars. We analysed the set of independent variables extracted from Kepler light curves and inve","authors_text":"Fabio Del Sordo, Lu\\'is Torgo, Nuno R. C. Gomes","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2023-05-03T20:01:15Z","title":"Predicting Stellar Rotation Periods Using XGBoost"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2305.02407","kind":"arxiv","version":3},"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:d4af386a48fbb7cb3d7aa4c47ffc1d4da3363460dd5556b07a72ec1557f72dc9","target":"record","created_at":"2026-07-05T09:14:16Z","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":"24b8165c176786b1fc9d611089dfc09fd6cced4a2514a1d405061738173cc626","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2023-05-03T20:01:15Z","title_canon_sha256":"693c555e693fe10573ab8f0550bf3226eb37e689fd02b64d8d347f7d20c6ee48"},"schema_version":"1.0","source":{"id":"2305.02407","kind":"arxiv","version":3}},"canonical_sha256":"5a8aaf2ccac55a2cc7d0a56fd983d1c8fbfa42c77eb740cd55bd344a1798bbd0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5a8aaf2ccac55a2cc7d0a56fd983d1c8fbfa42c77eb740cd55bd344a1798bbd0","first_computed_at":"2026-07-05T09:14:16.541088Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T09:14:16.541088Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8q2X9i6oleHYXOBg9jc7Izzpv7w1mC+vHvmxtg6suFYqMp1Dz/lC0LU1g1o19eBfarJFk2CaV6ievuyKlmrGAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T09:14:16.541633Z","signed_message":"canonical_sha256_bytes"},"source_id":"2305.02407","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d4af386a48fbb7cb3d7aa4c47ffc1d4da3363460dd5556b07a72ec1557f72dc9","sha256:28e28eb4910ec3026fd704f108df93022886cfe0381bd23c0e7fe4241feddfa6"],"state_sha256":"4ad4083b3be8ab09a7b3d8849f210474e573ac819f21e131cab61c7f0eaed5b1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OMAgMX6EWYQYrFS4+hFVpoINtlJntdB0Woxvo8/KNZWmHsUEzKYcMdN6pbXCjJ/IWDvJTeS4ITHxyik99ncYCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-21T11:40:18.090579Z","bundle_sha256":"9f181b446f48d6c85b3502741261e1d23800c4d8c426325a91b0fe9b706905b4"}}