{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:UUANANQ2NNNNA636MZL2WCMU4Z","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":"47b24803f30fa669753f53d3b0cfc4eb8124ac2b2ee1148b7fd090c6427bff30","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-02-28T16:01:41Z","title_canon_sha256":"829d10b74d4baed96e1864d68c6119ee17f2b8dec758e45230f2cc3c1f3f8094"},"schema_version":"1.0","source":{"id":"1902.11182","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.11182","created_at":"2026-05-17T23:48:30Z"},{"alias_kind":"arxiv_version","alias_value":"1902.11182v1","created_at":"2026-05-17T23:48:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.11182","created_at":"2026-05-17T23:48:30Z"},{"alias_kind":"pith_short_12","alias_value":"UUANANQ2NNNN","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_16","alias_value":"UUANANQ2NNNNA636","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_8","alias_value":"UUANANQ2","created_at":"2026-05-18T12:33:30Z"}],"graph_snapshots":[{"event_id":"sha256:7d2f1ebfe16f5ec739e983d79ef1310c52b807183e8b2e401dba6e2cec7f06af","target":"graph","created_at":"2026-05-17T23:48:30Z","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":"Measuring stellar rotational velocities is a powerful way to probe the many astrophysical phenomena that drive, or are driven by, the evolution of stellar angular momentum. In this paper, we present a novel data-driven approach to measuring the projected rotational velocity, $v\\sin{i}$. Rather than directly measuring the broadening of spectral lines, we leverage the large information content of high-resolution spectral data to empirically estimate $v\\sin{i}$. We adapt the framework laid down by The Cannon (Ness et al. 2015), which trains a generative model of the stellar flux as a function of ","authors_text":"Cullen Blake, Steven Gilhool","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-02-28T16:01:41Z","title":"A Data-Driven Technique for Measuring Stellar Rotation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.11182","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:ab212cd70818b46d4e6bd5ae26d5b5bf3e8dbb53e3c10329eac643c52b861123","target":"record","created_at":"2026-05-17T23:48:30Z","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":"47b24803f30fa669753f53d3b0cfc4eb8124ac2b2ee1148b7fd090c6427bff30","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-02-28T16:01:41Z","title_canon_sha256":"829d10b74d4baed96e1864d68c6119ee17f2b8dec758e45230f2cc3c1f3f8094"},"schema_version":"1.0","source":{"id":"1902.11182","kind":"arxiv","version":1}},"canonical_sha256":"a500d0361a6b5ad07b7e6657ab0994e6726bc9afb106aaa41b14c65f4fc0a722","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a500d0361a6b5ad07b7e6657ab0994e6726bc9afb106aaa41b14c65f4fc0a722","first_computed_at":"2026-05-17T23:48:30.199026Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:48:30.199026Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"D0bmRnOY+edV5BhJTYGybMMm3pNZ1CT24Tv9jIsQuXNyAQCubVTtIv8xP9sQ72XQ6MlC7wUOnVgQUy9rQDErAQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:48:30.199725Z","signed_message":"canonical_sha256_bytes"},"source_id":"1902.11182","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ab212cd70818b46d4e6bd5ae26d5b5bf3e8dbb53e3c10329eac643c52b861123","sha256:7d2f1ebfe16f5ec739e983d79ef1310c52b807183e8b2e401dba6e2cec7f06af"],"state_sha256":"7b7a45ba6ab52b8fc8f9e43f8e4e58a300bd69bcde6985492718360f2278023e"}