{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:NHRQZDZUXDJFTQZPEUXN4HPKJ3","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":"a4dbca17d0cb9c61a00a043e2544ed34bc8a437eb10f6fd502d1df19f563789b","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-07-09T16:36:09Z","title_canon_sha256":"cfa7a20a99f5a8f40ba6a7f37da4c93fbf3c0a51eb4bfb26dd0b26519d6d911f"},"schema_version":"1.0","source":{"id":"1407.2555","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.2555","created_at":"2026-05-18T01:42:38Z"},{"alias_kind":"arxiv_version","alias_value":"1407.2555v1","created_at":"2026-05-18T01:42:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.2555","created_at":"2026-05-18T01:42:38Z"},{"alias_kind":"pith_short_12","alias_value":"NHRQZDZUXDJF","created_at":"2026-05-18T12:28:41Z"},{"alias_kind":"pith_short_16","alias_value":"NHRQZDZUXDJFTQZP","created_at":"2026-05-18T12:28:41Z"},{"alias_kind":"pith_short_8","alias_value":"NHRQZDZU","created_at":"2026-05-18T12:28:41Z"}],"graph_snapshots":[{"event_id":"sha256:9fa358e4bc7edcea04d63b20a64c2abf8c9a7862548e511673b960c54379d457","target":"graph","created_at":"2026-05-18T01:42:38Z","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":"To directly image exoplanets and faint circumstellar disks, the noisy stellar halo must be suppressed to a high level. To achieve this feat, the angular differential imaging observing technique and the least-squares Locally Optimized Combination of Images (LOCI) algorithm have now become the standard in single band direct imaging observations and data reduction. With the development and commissioning of new high-order high-contrast adaptive optics equipped with integral field units, the image subtraction algorithm needs to be modified to allow the optimal use of polychromatic images, field-rot","authors_text":"Bruce Macintosh, Carlos Correia, Christian Marois, Patrick Ingraham, Raphael Galicher, Rob De Rosa, Thayne Currie","cross_cats":["astro-ph.EP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-07-09T16:36:09Z","title":"GPI PSF subtraction with TLOCI: the next evolution in exoplanet/disk high-contrast imaging"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.2555","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":"sha256:6f9ce53d5aae157a958db49641f2b18fcf07577bda6aaf92e42e51e6b13932ab","target":"record","created_at":"2026-05-18T01:42:38Z","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":"a4dbca17d0cb9c61a00a043e2544ed34bc8a437eb10f6fd502d1df19f563789b","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-07-09T16:36:09Z","title_canon_sha256":"cfa7a20a99f5a8f40ba6a7f37da4c93fbf3c0a51eb4bfb26dd0b26519d6d911f"},"schema_version":"1.0","source":{"id":"1407.2555","kind":"arxiv","version":1}},"canonical_sha256":"69e30c8f34b8d259c32f252ede1dea4ef3a955025d1ef5853b465144a555b2fa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"69e30c8f34b8d259c32f252ede1dea4ef3a955025d1ef5853b465144a555b2fa","first_computed_at":"2026-05-18T01:42:38.532475Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:42:38.532475Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VxEhJK4huDdQU1Hs2Ha6GR8Aou7AsYjqqsqj2w1CCD34n7i/ssLUQMc+3LYQxu3AfisExqGGi1eBm/HVAE44Dg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:42:38.532947Z","signed_message":"canonical_sha256_bytes"},"source_id":"1407.2555","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6f9ce53d5aae157a958db49641f2b18fcf07577bda6aaf92e42e51e6b13932ab","sha256:9fa358e4bc7edcea04d63b20a64c2abf8c9a7862548e511673b960c54379d457"],"state_sha256":"f211c30598d65e9f3c9190ea7095a072967621fba471bbb076b0c54ee742e032"}