{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:D5CMRUVO42M2QWAFPU4T7MRZZ5","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":"37987cfb543cae05ed36f3cafaf4a0fd5654ea249f614f4dda8286770dc6816e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-08-17T07:40:05Z","title_canon_sha256":"70a4a03833153d5cb8fe5d55c5839ad8051a17f82639c87dfe4f1a50513cbbf8"},"schema_version":"1.0","source":{"id":"1008.2840","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1008.2840","created_at":"2026-05-18T02:05:47Z"},{"alias_kind":"arxiv_version","alias_value":"1008.2840v1","created_at":"2026-05-18T02:05:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1008.2840","created_at":"2026-05-18T02:05:47Z"},{"alias_kind":"pith_short_12","alias_value":"D5CMRUVO42M2","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_16","alias_value":"D5CMRUVO42M2QWAF","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_8","alias_value":"D5CMRUVO","created_at":"2026-05-18T12:26:06Z"}],"graph_snapshots":[{"event_id":"sha256:cd5e34a560e015f08f12d6ac3e6d78b260c12b9b46b15561d9d8d36ceb9c4128","target":"graph","created_at":"2026-05-18T02:05:47Z","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":"Westerlund 1 is a young, massive Galactic starburst cluster that contains a rich coeval population of Wolf-Rayet stars, hot- and cool-phase transitional supergiants, and a magnetar. We use spectroscopic and photometric observations of the eclipsing double-lined binary W13 to derive dynamical masses for the two components, in order to determine limits for the progenitor masses of the magnetar CXOU J164710.2-455216 and the population of evolved stars in Wd1. W13 has an orbital period of 9.2709+/-0.0015 days and near-contact configuration. The shallow photometric eclipse rules out an inclination ","authors_text":"B.W. Ritchie, I. Negueruela, J.S. Clark, N. Langer","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-08-17T07:40:05Z","title":"A VLT/FLAMES survey for massive binaries in Westerlund 1: II. Dynamical constraints on magnetar progenitor masses from the eclipsing binary W13"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1008.2840","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":"sha256:31fc66f78956eb91a39f73f7f1ffb767a2b0705a4a9ded5a4aad350c9453d85c","target":"record","created_at":"2026-05-18T02:05:47Z","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":"37987cfb543cae05ed36f3cafaf4a0fd5654ea249f614f4dda8286770dc6816e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-08-17T07:40:05Z","title_canon_sha256":"70a4a03833153d5cb8fe5d55c5839ad8051a17f82639c87dfe4f1a50513cbbf8"},"schema_version":"1.0","source":{"id":"1008.2840","kind":"arxiv","version":1}},"canonical_sha256":"1f44c8d2aee699a858057d393fb239cf58cf579a3f77063e71c0e7d23a384f05","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1f44c8d2aee699a858057d393fb239cf58cf579a3f77063e71c0e7d23a384f05","first_computed_at":"2026-05-18T02:05:47.582955Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:05:47.582955Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"isDbmeSB2nbjAdTezQCRmL7gTzDSW2ZCdC4Ux0c8a9b6MQke5ucAutYGuVTLAxHDlGxBIFtRANY0bWF9UBVaAA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:05:47.583716Z","signed_message":"canonical_sha256_bytes"},"source_id":"1008.2840","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:31fc66f78956eb91a39f73f7f1ffb767a2b0705a4a9ded5a4aad350c9453d85c","sha256:cd5e34a560e015f08f12d6ac3e6d78b260c12b9b46b15561d9d8d36ceb9c4128"],"state_sha256":"9b6d5dd24a04cac95ab170b1562aeceb70c73658f4733143561d56013e362206"}