{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:RK5BDI57Q3PNZJC5I4YF4H5RHR","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":"62dd05a2317907d3424941f741c2c1787aaec9c71cc2311ce4d60a09de154a9d","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-01-29T21:00:00Z","title_canon_sha256":"7015b77654e84320d229d8828e82f95c296da6f0877a045d74c7745588982ebf"},"schema_version":"1.0","source":{"id":"1801.09760","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.09760","created_at":"2026-05-18T00:20:02Z"},{"alias_kind":"arxiv_version","alias_value":"1801.09760v1","created_at":"2026-05-18T00:20:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.09760","created_at":"2026-05-18T00:20:02Z"},{"alias_kind":"pith_short_12","alias_value":"RK5BDI57Q3PN","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_16","alias_value":"RK5BDI57Q3PNZJC5","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_8","alias_value":"RK5BDI57","created_at":"2026-05-18T12:32:50Z"}],"graph_snapshots":[{"event_id":"sha256:e3e2b8e6887e7c56054883ab3b1a3e1d5a3718107bf81ff806975eb2e245d72a","target":"graph","created_at":"2026-05-18T00:20:02Z","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 present early laboratory simulations and extensive on-sky tests validating of the performance of a shaped pupil coronagraph (SPC) behind an extreme-AO corrected beam of the Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) system. In tests with the SCExAO internal source/wavefront error simulator, the normalized intensity profile for the SPC degrades more slowly than for the Lyot coronagraph as low-order aberrations reduce the Strehl ratio from extremely high values (S.R. $\\sim$ 0.93--0.99) to those characteristic of current ground-based extreme AO systems (S.R. $\\sim$ 0.74--0.93) and t","authors_text":"Frantz Martinache, Jeffery Chilcote, Jonas Kuhn, Julien Lozi, Nemanja Jovanovic, N. Jeremy Kasdin, Nour Skaf, Olivier Guyon, Prashant Patak, Thayne Currie, Timothy Brandt, Tomoyuki Kudo, Tyler Groff","cross_cats":["astro-ph.EP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-01-29T21:00:00Z","title":"Laboratory and On-Sky Validation of the Shaped Pupil Coronagraph's Sensitivity to Low-Order Aberrations With Active Wavefront Control"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.09760","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:d0b163f28750c0c62c5c86310b3138ef166f621b807c0099f7847654f14c7a31","target":"record","created_at":"2026-05-18T00:20:02Z","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":"62dd05a2317907d3424941f741c2c1787aaec9c71cc2311ce4d60a09de154a9d","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-01-29T21:00:00Z","title_canon_sha256":"7015b77654e84320d229d8828e82f95c296da6f0877a045d74c7745588982ebf"},"schema_version":"1.0","source":{"id":"1801.09760","kind":"arxiv","version":1}},"canonical_sha256":"8aba11a3bf86dedca45d47305e1fb13c62fb0c4c0665dded01d3ec653e66c351","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8aba11a3bf86dedca45d47305e1fb13c62fb0c4c0665dded01d3ec653e66c351","first_computed_at":"2026-05-18T00:20:02.435146Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:20:02.435146Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"El0Hc7HkKposxQAf7Il/KeyqqVVA23Lx4sNSoQLQM3fS6gOTN6sFmt8+kqfH0oJgypHM7an3Up91OMUN1+bWBw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:20:02.435831Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.09760","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d0b163f28750c0c62c5c86310b3138ef166f621b807c0099f7847654f14c7a31","sha256:e3e2b8e6887e7c56054883ab3b1a3e1d5a3718107bf81ff806975eb2e245d72a"],"state_sha256":"068be47ea7dbccc358e0d9a3a3e028b8bf27cdf474adfca54a2246c97e387c69"}