{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:3MA6UYPOGSHQ25CB66FPWLMJSS","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":"cc9a545fb6f0330512a60f5a3ef5de91898be68d97cb1b6602d17f570f5612e6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-11-15T12:05:52Z","title_canon_sha256":"b499c286f8de173c0fa00ad266233ff3f81e1cdebc0a7538c73f4c77a467a16e"},"schema_version":"1.0","source":{"id":"1811.06307","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.06307","created_at":"2026-05-17T23:56:17Z"},{"alias_kind":"arxiv_version","alias_value":"1811.06307v1","created_at":"2026-05-17T23:56:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.06307","created_at":"2026-05-17T23:56:17Z"},{"alias_kind":"pith_short_12","alias_value":"3MA6UYPOGSHQ","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_16","alias_value":"3MA6UYPOGSHQ25CB","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_8","alias_value":"3MA6UYPO","created_at":"2026-05-18T12:32:02Z"}],"graph_snapshots":[{"event_id":"sha256:c0a73a805928722b761114ac18430bfa97383f768e1e984c51bb52fd36c3b15b","target":"graph","created_at":"2026-05-17T23:56:17Z","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":"The study of massive stars in different metallicity environments is a central topic of current stellar research. The spectral analysis of massive stars requires adequate model atmospheres. The computation of such models is difficult and time-consuming. Therefore, spectral analyses are greatly facilitated if they can refer to existing grids of models. Here we provide grids of model atmospheres for OB-type stars at metallicities corresponding to the Small and Large Magellanic Clouds, as well as to solar metallicity. In total, the grids comprise 785 individual models. The models were calculated u","authors_text":"A. A. C. Sander, D. Gruner, H. Todt, L. M. Oskinova, R. Hainich, T. Shenar, V. Ramachandran, W.-R. Hamann","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-11-15T12:05:52Z","title":"PoWR grids of non-LTE model atmospheres for OB-type stars of various metallicities"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.06307","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:b09d1f7c6c0deb821994b42508aabe829733a5e3ce6a90cc2a2d70aa2f8753c4","target":"record","created_at":"2026-05-17T23:56:17Z","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":"cc9a545fb6f0330512a60f5a3ef5de91898be68d97cb1b6602d17f570f5612e6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-11-15T12:05:52Z","title_canon_sha256":"b499c286f8de173c0fa00ad266233ff3f81e1cdebc0a7538c73f4c77a467a16e"},"schema_version":"1.0","source":{"id":"1811.06307","kind":"arxiv","version":1}},"canonical_sha256":"db01ea61ee348f0d7441f78afb2d899487695f54298ebc22cbf60b58beaab140","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"db01ea61ee348f0d7441f78afb2d899487695f54298ebc22cbf60b58beaab140","first_computed_at":"2026-05-17T23:56:17.003127Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:56:17.003127Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nJWIUtAU3v/Wh/IMoY33kAq0ydX9z3MnVfRElrF63aB1mqdMgtFyk9J5smfDOewT2a9B2a0lHX9chrAToCw+AQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:56:17.003697Z","signed_message":"canonical_sha256_bytes"},"source_id":"1811.06307","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b09d1f7c6c0deb821994b42508aabe829733a5e3ce6a90cc2a2d70aa2f8753c4","sha256:c0a73a805928722b761114ac18430bfa97383f768e1e984c51bb52fd36c3b15b"],"state_sha256":"49f15ccf2d02f983e8d0628b3bf44351ee45dcbdacfa06430b15249fac28607e"}