{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:TKHMXYN7JWLTCC2IFGSTFIYZAO","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":"404a45db36f8fe60ed1c23bfc63a4e91437950619e125ffd07da8b3018728c7a","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2022-08-03T23:15:22Z","title_canon_sha256":"6e21df6f8b6ea0b1e0f5c09a9e4d505233c89f10802d28917c7e4e478439903c"},"schema_version":"1.0","source":{"id":"2208.02380","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2208.02380","created_at":"2026-07-05T04:46:03Z"},{"alias_kind":"arxiv_version","alias_value":"2208.02380v1","created_at":"2026-07-05T04:46:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2208.02380","created_at":"2026-07-05T04:46:03Z"},{"alias_kind":"pith_short_12","alias_value":"TKHMXYN7JWLT","created_at":"2026-07-05T04:46:03Z"},{"alias_kind":"pith_short_16","alias_value":"TKHMXYN7JWLTCC2I","created_at":"2026-07-05T04:46:03Z"},{"alias_kind":"pith_short_8","alias_value":"TKHMXYN7","created_at":"2026-07-05T04:46:03Z"}],"graph_snapshots":[{"event_id":"sha256:b72f3f2f42e701daaf4c1411a35eaf652fa3f5a1eb10dd6b41deaafcd3277a94","target":"graph","created_at":"2026-07-05T04:46:03Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2208.02380/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We describe the design and initial results from a visible-light Lyot coronagraph for SCExAO/VAMPIRES. The coronagraph is comprised of four hard-edged, partially transmissive focal plane masks with inner working angles of 36 mas, 55 mas, 92 mas, and 129 mas, respectively. The Lyot stop is a reflective, undersized design with a geometric throughput of 65.7%. Our preliminary on-sky contrast is 1e-2 at 0.1\" to 1e-4 at 0.75\" for all mask sizes. The coronagraph was deployed in early 2022 and is available for open use.","authors_text":"Barnaby Norris, Julien Lozi, Kyohoon Ahn, Michael Bottom, Miles Lucas, Nour Skaf, Olivier Guyon, Peter Tuthill, Sebastien Vievard, Vincent Deo","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2022-08-03T23:15:22Z","title":"A Visible-light Lyot Coronagraph for SCExAO/VAMPIRES"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2208.02380","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":"sha256:8287a1b7b867b870426f400a466f3c1f991455a9310e20a172b00d8c490e5c99","target":"record","created_at":"2026-07-05T04:46:03Z","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":"404a45db36f8fe60ed1c23bfc63a4e91437950619e125ffd07da8b3018728c7a","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2022-08-03T23:15:22Z","title_canon_sha256":"6e21df6f8b6ea0b1e0f5c09a9e4d505233c89f10802d28917c7e4e478439903c"},"schema_version":"1.0","source":{"id":"2208.02380","kind":"arxiv","version":1}},"canonical_sha256":"9a8ecbe1bf4d97310b4829a532a3190392f9585e60eb054da4bd491e3522d90c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9a8ecbe1bf4d97310b4829a532a3190392f9585e60eb054da4bd491e3522d90c","first_computed_at":"2026-07-05T04:46:03.941146Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:46:03.941146Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7gr0Lg5KKudGBUKKB8Dj62nNpMeaQlzsG/FNKAlIxpNkBjT54d2+KjS2X5+2tWWRZMdeAbBjnZPJFZt7PmuVCA==","signature_status":"signed_v1","signed_at":"2026-07-05T04:46:03.941610Z","signed_message":"canonical_sha256_bytes"},"source_id":"2208.02380","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8287a1b7b867b870426f400a466f3c1f991455a9310e20a172b00d8c490e5c99","sha256:b72f3f2f42e701daaf4c1411a35eaf652fa3f5a1eb10dd6b41deaafcd3277a94"],"state_sha256":"b15b76b613be658c0574dd80e8970be992044fe158ac17d112ca68b241ea9806"}