{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:WHUYZKPFK7MUUJHBA22QDMVBE4","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":"6e658e7447fab38a1011a589c39d90d3deaf36c4f6300ae43695cb2719d0f786","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-09-28T05:51:26Z","title_canon_sha256":"37f129b302721da0da52bc483f7f813205276094ed900eba11e6da0723268abf"},"schema_version":"1.0","source":{"id":"1209.6427","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.6427","created_at":"2026-05-18T01:54:13Z"},{"alias_kind":"arxiv_version","alias_value":"1209.6427v1","created_at":"2026-05-18T01:54:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.6427","created_at":"2026-05-18T01:54:13Z"},{"alias_kind":"pith_short_12","alias_value":"WHUYZKPFK7MU","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_16","alias_value":"WHUYZKPFK7MUUJHB","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_8","alias_value":"WHUYZKPF","created_at":"2026-05-18T12:27:25Z"}],"graph_snapshots":[{"event_id":"sha256:516f4081500086132570146f8f8f6ea7e49591fc3e18db2f566bd7c9eabe8f80","target":"graph","created_at":"2026-05-18T01:54:13Z","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 report the results of Australia Telescope Compact Array (ATCA) observations of the Westerlund~1 (Wd1) region in the SiO v=1, J=1-0 and H2O 6(16)-5(23) maser lines, and we also report the analysis of maser properties of red supergiants (RSGs) associated with 6 massive clusters including Wd1. The primary purpose of this research is to explore possibilities of using maser emission for investigating the nature of massive clusters and associated RSGs. The SiO v=1, J=1-0 and H2O 6(16)-5(23) maser lines are detected toward 2 of 4 known RSGs in Wd1. The large velocity ranges of maser emission are c","authors_text":"(2) Nobeyama Radio Observatory), Bosco H. K. Yung (1), Chih-Hao Hsia (1), Jun-ichi Nakashima (1), Shuji Deguchi (2) ((1) U. of Hong Kong, Thomas K. T. Fok (1)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-09-28T05:51:26Z","title":"Maser Observations of Westerlund 1 and Comprehensive Considerations on Maser Properties of Red Supergiants Associated with Massive Clusters"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.6427","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":"sha256:1fe8bb65a7d5fd4fa34b352221c0ac7cf813daaf82c436a6d8e129e13248af55","target":"record","created_at":"2026-05-18T01:54:13Z","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":"6e658e7447fab38a1011a589c39d90d3deaf36c4f6300ae43695cb2719d0f786","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-09-28T05:51:26Z","title_canon_sha256":"37f129b302721da0da52bc483f7f813205276094ed900eba11e6da0723268abf"},"schema_version":"1.0","source":{"id":"1209.6427","kind":"arxiv","version":1}},"canonical_sha256":"b1e98ca9e557d94a24e106b501b2a1273627febffd92bbdb6ee407beb03ccd5a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b1e98ca9e557d94a24e106b501b2a1273627febffd92bbdb6ee407beb03ccd5a","first_computed_at":"2026-05-18T01:54:13.012027Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:54:13.012027Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"h1Vk/B3toCSP0AEseSzCPkjf2l1/Nrrr4J1uPP78uI4vlaNosTl2+rEEz/RhrJS8w+5PVQJ0lkoz39UnMSmACA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:54:13.012465Z","signed_message":"canonical_sha256_bytes"},"source_id":"1209.6427","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1fe8bb65a7d5fd4fa34b352221c0ac7cf813daaf82c436a6d8e129e13248af55","sha256:516f4081500086132570146f8f8f6ea7e49591fc3e18db2f566bd7c9eabe8f80"],"state_sha256":"c232329c8a99ed2a1d0191373ebc839283fd3b8e7894475b2a9ddc8e38f87000"}