{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:KDRQSAIYNI5H3LWPEZ5XYSEYN6","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":"5c38c5cb80913982a0539c10227ef89dda7b3b59cc78213d73e7120b0519bb54","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-07-27T18:00:30Z","title_canon_sha256":"ee5afec3ec80e11735fdcf1d076c294735985f64798f31ee55f82495a541825f"},"schema_version":"1.0","source":{"id":"1807.10779","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.10779","created_at":"2026-05-18T00:08:37Z"},{"alias_kind":"arxiv_version","alias_value":"1807.10779v1","created_at":"2026-05-18T00:08:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.10779","created_at":"2026-05-18T00:08:37Z"},{"alias_kind":"pith_short_12","alias_value":"KDRQSAIYNI5H","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_16","alias_value":"KDRQSAIYNI5H3LWP","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_8","alias_value":"KDRQSAIY","created_at":"2026-05-18T12:32:33Z"}],"graph_snapshots":[{"event_id":"sha256:a3927322eef5f4d7e35fc552ee5f306f255d290888b5a496d7a90cc61570a11f","target":"graph","created_at":"2026-05-18T00:08:37Z","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":"We present an analysis of the relatively low mass ($\\sim2400$~M$_{\\odot}$), $\\sim800$~Myr, Galactic open cluster, NGC~2818, using Gaia DR2 results combined with VLT/FLAMES spectroscopy. Using Gaia DR2 proper motions and parallax measurements we are able to select a clean sample of cluster members. This cluster displays a clear extended main sequence turn-off (eMSTO), a phenomenon previously studied mainly in young and intermediate age massive clusters in the Magellanic clouds. The main sequence of NGC~2818 is extremely narrow, with a width of $\\sim0.01$ magnitudes (G$_{\\rm BP} - $ G$_{\\rm RP}$","authors_text":"C. Charbonnel, C. Georgy, C. Usher, I. Cabrera-Ziri, M. de Juan Ovelar, N. Bastian, S. Ekstr\\\"om, S. Kamann","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-07-27T18:00:30Z","title":"Extended Main Sequence Turnoffs in Open Clusters as Seen by Gaia: I. NGC 2818 and the Role of Stellar Rotation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.10779","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:e8c1e52b6817c05a89e3d6f52c0130530244292ec60b70cba4ec54c4bb3074e4","target":"record","created_at":"2026-05-18T00:08:37Z","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":"5c38c5cb80913982a0539c10227ef89dda7b3b59cc78213d73e7120b0519bb54","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-07-27T18:00:30Z","title_canon_sha256":"ee5afec3ec80e11735fdcf1d076c294735985f64798f31ee55f82495a541825f"},"schema_version":"1.0","source":{"id":"1807.10779","kind":"arxiv","version":1}},"canonical_sha256":"50e30901186a3a7daecf267b7c48986f932e518c11a2e7c63e569c91c9e419fd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"50e30901186a3a7daecf267b7c48986f932e518c11a2e7c63e569c91c9e419fd","first_computed_at":"2026-05-18T00:08:37.611384Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:08:37.611384Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Lux0PX77lgZrn2h29iIHkvZ+AiajntUerTdphlws+x4lc94anvMXoogKh2B7wIVKrXJSVmvyujjnTkCHA8tiDw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:08:37.612085Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.10779","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e8c1e52b6817c05a89e3d6f52c0130530244292ec60b70cba4ec54c4bb3074e4","sha256:a3927322eef5f4d7e35fc552ee5f306f255d290888b5a496d7a90cc61570a11f"],"state_sha256":"dba569c9720ebd25034d5f9be4c3709881ccdf42b115e2ac3b7bde07a696696b"}