{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:UYBFDRO64FKNFOXHBKKQXONPWZ","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":"f8cfd73f8fb450910adbd612b5c6dc47d8d950a39d9a1bb3e66b640610b2852b","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-02-26T12:35:23Z","title_canon_sha256":"01657f2777e21096b6d71c6871e4a25271ecdb88ac5552da576171eb6a845ecc"},"schema_version":"1.0","source":{"id":"1902.09891","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.09891","created_at":"2026-05-17T23:47:16Z"},{"alias_kind":"arxiv_version","alias_value":"1902.09891v1","created_at":"2026-05-17T23:47:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.09891","created_at":"2026-05-17T23:47:16Z"},{"alias_kind":"pith_short_12","alias_value":"UYBFDRO64FKN","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_16","alias_value":"UYBFDRO64FKNFOXH","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_8","alias_value":"UYBFDRO6","created_at":"2026-05-18T12:33:30Z"}],"graph_snapshots":[{"event_id":"sha256:1e1868b23e929b8da68455d1027162cd7358afca89ba3c84e14a8491b8bb40b5","target":"graph","created_at":"2026-05-17T23:47:16Z","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"},"paper":{"abstract_excerpt":"We estimate physical parameters for the late-type massive stars observed as part of the VLT-FLAMES Tarantula Survey (VFTS) in the 30 Doradus region of the Large Magellanic Cloud (LMC). The observational sample comprises 20 candidate red supergiants (RSGs) which are the reddest (($B-V$) $>$ 1 mag) and brightest ($V$ $<$ 16 mag) objects in the VFTS. We use optical and near-IR photometry to estimate their temperatures and luminosities, and introduce the luminosity-age diagram to estimate their ages. We derive physical parameters for our targets, including temperatures from a new calibration of $(","authors_text":"A. de Koter, A. Herrero, C. J. Evans, D. J. Lennon, F. R. N. Schneider, H. Sana, J. S. Clark, J. Th. van Loon, L. A. Almeida, L. R. Patrick, N. Britavskiy, N. Langer, W. D. Taylor","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-02-26T12:35:23Z","title":"The VLT-FLAMES Tarantula Survey. XXX. Red stragglers in the clusters Hodge 301 and SL 639"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.09891","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":"sha256:567150c929ef8cf4e978fa3e790d8da4b41bacdb8675afe0138606bc03d8e42d","target":"record","created_at":"2026-05-17T23:47:16Z","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":"f8cfd73f8fb450910adbd612b5c6dc47d8d950a39d9a1bb3e66b640610b2852b","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-02-26T12:35:23Z","title_canon_sha256":"01657f2777e21096b6d71c6871e4a25271ecdb88ac5552da576171eb6a845ecc"},"schema_version":"1.0","source":{"id":"1902.09891","kind":"arxiv","version":1}},"canonical_sha256":"a60251c5dee154d2bae70a950bb9afb67d8c3b2086b0d875dc8efa8cb1c06480","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a60251c5dee154d2bae70a950bb9afb67d8c3b2086b0d875dc8efa8cb1c06480","first_computed_at":"2026-05-17T23:47:16.979691Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:47:16.979691Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gQwZ2oXOkzbI+D0Qk5/fMXpkOqaVG3saRL6HIcg/UQqfzuHrOx8eowFYyld+OY3DNIA9kdfceIYO1wRcn/94BQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:47:16.980079Z","signed_message":"canonical_sha256_bytes"},"source_id":"1902.09891","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:567150c929ef8cf4e978fa3e790d8da4b41bacdb8675afe0138606bc03d8e42d","sha256:1e1868b23e929b8da68455d1027162cd7358afca89ba3c84e14a8491b8bb40b5"],"state_sha256":"a28030d93a866492f5c3cf711fbed7ba5e4d9b3c387ad984d5bd3e1603d9ce03"}