{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:CQSYRXJFFEBEXONQJOKW6NIRI7","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":"f25e16768d507cac73e74873a529987cb479d8d9f306b6fbb76798dce9f67d37","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-05-29T00:04:39Z","title_canon_sha256":"1543dfcbd858ba359770d9faa95585ec0b757c0d79764d0a6369f8cd7a2aed9d"},"schema_version":"1.0","source":{"id":"1405.7426","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1405.7426","created_at":"2026-05-18T02:27:57Z"},{"alias_kind":"arxiv_version","alias_value":"1405.7426v3","created_at":"2026-05-18T02:27:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1405.7426","created_at":"2026-05-18T02:27:57Z"},{"alias_kind":"pith_short_12","alias_value":"CQSYRXJFFEBE","created_at":"2026-05-18T12:28:22Z"},{"alias_kind":"pith_short_16","alias_value":"CQSYRXJFFEBEXONQ","created_at":"2026-05-18T12:28:22Z"},{"alias_kind":"pith_short_8","alias_value":"CQSYRXJF","created_at":"2026-05-18T12:28:22Z"}],"graph_snapshots":[{"event_id":"sha256:3c2f085d7d5b2f566a39f7459b1bfb653db8bfcba425a8fb7ab2413dd6b1968b","target":"graph","created_at":"2026-05-18T02:27:57Z","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":"Direct imaging of protoplanetary disks promises to provide key insight into the complex sequence of processes by which planets are formed. However imaging the innermost region of such disks (a zone critical to planet formation) is challenging for traditional observational techniques (such as near-IR imaging and coronagraphy) due to the relatively long wavelengths involved and the area occulted by the coronagraphic mask. Here we introduce a new instrument -- VAMPIRES -- which combines non-redundant aperture-masking interferometry with differential polarimetry to directly image this previously i","authors_text":"Barnaby Norris, Frantz Martinache, Guillaume Schworer, Nemanja Jovanovic, Olivier Guyon, Paul Stewart, Peter Tuthill","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-05-29T00:04:39Z","title":"The VAMPIRES instrument: Imaging the innermost regions of protoplanetary disks with polarimetric interferometry"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1405.7426","kind":"arxiv","version":3},"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":"sha256:2bf97daa00a5df8796fe44b9d3c5c6b42ff43017d28e4641943f3c5db73b9207","target":"record","created_at":"2026-05-18T02:27:57Z","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":"f25e16768d507cac73e74873a529987cb479d8d9f306b6fbb76798dce9f67d37","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-05-29T00:04:39Z","title_canon_sha256":"1543dfcbd858ba359770d9faa95585ec0b757c0d79764d0a6369f8cd7a2aed9d"},"schema_version":"1.0","source":{"id":"1405.7426","kind":"arxiv","version":3}},"canonical_sha256":"142588dd2529024bb9b04b956f351147e8f1940236d84ba48e46b7facf140a31","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"142588dd2529024bb9b04b956f351147e8f1940236d84ba48e46b7facf140a31","first_computed_at":"2026-05-18T02:27:57.152914Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:27:57.152914Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6AJVOTTrE10+cZ7VwR15vQymDkOKB4a7Cg/izpTXJAz1vpHAiBQHhNEryOWK7RaA5X1mMgk/23TWk+InOwGsAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:27:57.153600Z","signed_message":"canonical_sha256_bytes"},"source_id":"1405.7426","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2bf97daa00a5df8796fe44b9d3c5c6b42ff43017d28e4641943f3c5db73b9207","sha256:3c2f085d7d5b2f566a39f7459b1bfb653db8bfcba425a8fb7ab2413dd6b1968b"],"state_sha256":"9d631cc44b297bfd9bb48b1e25593945975cdd757a53d790c0040b3e2b41d2ac"}