{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:GVBRKPRPJLJC7NHPOPVM5W3HHH","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":"2453a8be6b76be2760b2dac38ad26812eac643cf63d498a5b48e8401381610cc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2009-09-18T12:18:48Z","title_canon_sha256":"5c8798e8866896b892fcfd97185293934c7d31bcbea6f8969d337622a109a6e6"},"schema_version":"1.0","source":{"id":"0909.3421","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.3421","created_at":"2026-05-18T02:11:46Z"},{"alias_kind":"arxiv_version","alias_value":"0909.3421v1","created_at":"2026-05-18T02:11:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.3421","created_at":"2026-05-18T02:11:46Z"},{"alias_kind":"pith_short_12","alias_value":"GVBRKPRPJLJC","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_16","alias_value":"GVBRKPRPJLJC7NHP","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_8","alias_value":"GVBRKPRP","created_at":"2026-05-18T12:25:59Z"}],"graph_snapshots":[{"event_id":"sha256:a26474762cd01c1a51c087f095d37a0d2dec4ee06dad8f89b74404b60e0343c6","target":"graph","created_at":"2026-05-18T02:11:46Z","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":"Adaptive Optics at mid-IR wavelengths has long been seen as either not necessary or easy. The impact of atmospheric turbulence on the performance of 8-10 meter class telescopes in the mid-IR is relatively small compared to other performance issues like sky background and telescope emission. Using a relatively low order AO system, Strehl Ratios of larger than 95% have been reported on 6-8 meter class telescopes. Going to 30-42 meter class telescopes changes this picture dramatically. High Strehl Ratios require what is currently considered a high-order AO system. Furthermore, even with a moderat","authors_text":"B. Brandl, L. Jolissaint, L. Venema, R. Stuik, S. Hippler, S. Kendrew","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2009-09-18T12:18:48Z","title":"Extreme Adaptive Optics in the mid-IR: The METIS AO system"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.3421","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":"sha256:906584fbe3fe173f6956bd081cc463ce0219722202b6e14aa9f12d6505360c1e","target":"record","created_at":"2026-05-18T02:11:46Z","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":"2453a8be6b76be2760b2dac38ad26812eac643cf63d498a5b48e8401381610cc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2009-09-18T12:18:48Z","title_canon_sha256":"5c8798e8866896b892fcfd97185293934c7d31bcbea6f8969d337622a109a6e6"},"schema_version":"1.0","source":{"id":"0909.3421","kind":"arxiv","version":1}},"canonical_sha256":"3543153e2f4ad22fb4ef73eacedb6739cfe8ce06cd1158424c3e2eb6aac0f9bc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3543153e2f4ad22fb4ef73eacedb6739cfe8ce06cd1158424c3e2eb6aac0f9bc","first_computed_at":"2026-05-18T02:11:46.485103Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:11:46.485103Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LdIttnbTeKCGecv53+bM3mRSBs1X6KojfTpSVQLHS2asymnxNjycMcTo+nBPdGZb9/u1OAUgFURcMvuZZVBiAg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:11:46.485895Z","signed_message":"canonical_sha256_bytes"},"source_id":"0909.3421","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:906584fbe3fe173f6956bd081cc463ce0219722202b6e14aa9f12d6505360c1e","sha256:a26474762cd01c1a51c087f095d37a0d2dec4ee06dad8f89b74404b60e0343c6"],"state_sha256":"8c3def62fda5734f1b1a048ea25f8124dd928adc8460f46d7479bcbca217f102"}