{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:GS6X2HIYVBZYECH4D53EXAM3LE","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":"1f28803180d5c4d4c0118584fc2328f25cf71e9c755b77ed401f7ddec4065105","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2022-12-05T22:38:42Z","title_canon_sha256":"72c456a2543a47edb491d8b3b3bf26e77a703c555eb56cdb393f474ea4b456f4"},"schema_version":"1.0","source":{"id":"2212.02633","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2212.02633","created_at":"2026-07-05T05:22:32Z"},{"alias_kind":"arxiv_version","alias_value":"2212.02633v1","created_at":"2026-07-05T05:22:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2212.02633","created_at":"2026-07-05T05:22:32Z"},{"alias_kind":"pith_short_12","alias_value":"GS6X2HIYVBZY","created_at":"2026-07-05T05:22:32Z"},{"alias_kind":"pith_short_16","alias_value":"GS6X2HIYVBZYECH4","created_at":"2026-07-05T05:22:32Z"},{"alias_kind":"pith_short_8","alias_value":"GS6X2HIY","created_at":"2026-07-05T05:22:32Z"}],"graph_snapshots":[{"event_id":"sha256:eaafd81fa3880daad30afed93dd7d8223e0dcb876ea98fdd00414bb7e3d287ad","target":"graph","created_at":"2026-07-05T05:22:32Z","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/2212.02633/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The detection and characterization of Earth-like exoplanets around Sun-like stars for future flagship missions requires coronagraphs to achieve contrasts on the order of 1e-10 at close angular separations and over large spectral bandwidths (>=20%). We present our progress thus far on exploring the potential for scalar vortex coronagraphs (SVCs) in direct exoplanet imaging. SVCs are an attractive alternative to vector vortex coronagraphs (VVCs), which have recently demonstrated 6e-9 raw contrast in 20% broadband light but are polarization dependent. SVCs imprint the same phase ramp on the incom","authors_text":"A.J. Eldorado Riggs, Arielle Bertrou-Cantou, Dimitri Mawet, Eugene Serabyn, Garreth Ruane, Jorge Llop-Sayson, Niyati Desai","cross_cats":["astro-ph.EP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2022-12-05T22:38:42Z","title":"Topological Designs for Scalar Vortex Coronagraphs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2212.02633","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":"sha256:6727eaec44e038f091a2f1b32121d94825ca3eecc99c5b89ce01c3c86ac738db","target":"record","created_at":"2026-07-05T05:22:32Z","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":"1f28803180d5c4d4c0118584fc2328f25cf71e9c755b77ed401f7ddec4065105","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2022-12-05T22:38:42Z","title_canon_sha256":"72c456a2543a47edb491d8b3b3bf26e77a703c555eb56cdb393f474ea4b456f4"},"schema_version":"1.0","source":{"id":"2212.02633","kind":"arxiv","version":1}},"canonical_sha256":"34bd7d1d18a8738208fc1f764b819b591bef63a7b626a72a8dd5c0fe59955c5a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"34bd7d1d18a8738208fc1f764b819b591bef63a7b626a72a8dd5c0fe59955c5a","first_computed_at":"2026-07-05T05:22:32.845255Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:22:32.845255Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2hT0PjRc0PEqVvNb7HsXQl0AbRpyDvPu4tFKCuidlmD/fuTFsrt2qA2siOPf94nYhhxyJ6AuCHyf7Dwb4NgbCA==","signature_status":"signed_v1","signed_at":"2026-07-05T05:22:32.845644Z","signed_message":"canonical_sha256_bytes"},"source_id":"2212.02633","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6727eaec44e038f091a2f1b32121d94825ca3eecc99c5b89ce01c3c86ac738db","sha256:eaafd81fa3880daad30afed93dd7d8223e0dcb876ea98fdd00414bb7e3d287ad"],"state_sha256":"894ccbb775d741612c21d7c5e0a215ca0d4e614d209f0d4795cf7211022e38da"}