{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:IWTT7TTTO7P4HPZSIFMQNKG3IX","short_pith_number":"pith:IWTT7TTT","canonical_record":{"source":{"id":"2606.10760","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2026-06-09T12:12:33Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"ce59b122dd6f80fac65b97f33f2fab3b01b6f6c658869dd4caf4886d17dfd6ca","abstract_canon_sha256":"a7c5b912045e2d62c213839a2dcc685dd94e15f557e2436669e21337eb304b32"},"schema_version":"1.0"},"canonical_sha256":"45a73fce7377dfc3bf32415906a8db45c25cd58a5741eaaed03acde496c70bbf","source":{"kind":"arxiv","id":"2606.10760","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.10760","created_at":"2026-06-10T01:10:39Z"},{"alias_kind":"arxiv_version","alias_value":"2606.10760v1","created_at":"2026-06-10T01:10:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.10760","created_at":"2026-06-10T01:10:39Z"},{"alias_kind":"pith_short_12","alias_value":"IWTT7TTTO7P4","created_at":"2026-06-10T01:10:39Z"},{"alias_kind":"pith_short_16","alias_value":"IWTT7TTTO7P4HPZS","created_at":"2026-06-10T01:10:39Z"},{"alias_kind":"pith_short_8","alias_value":"IWTT7TTT","created_at":"2026-06-10T01:10:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:IWTT7TTTO7P4HPZSIFMQNKG3IX","target":"record","payload":{"canonical_record":{"source":{"id":"2606.10760","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2026-06-09T12:12:33Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"ce59b122dd6f80fac65b97f33f2fab3b01b6f6c658869dd4caf4886d17dfd6ca","abstract_canon_sha256":"a7c5b912045e2d62c213839a2dcc685dd94e15f557e2436669e21337eb304b32"},"schema_version":"1.0"},"canonical_sha256":"45a73fce7377dfc3bf32415906a8db45c25cd58a5741eaaed03acde496c70bbf","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-10T01:10:39.144111Z","signature_b64":"U4PxOq6S+RMr4gwG4+gkg1w5MFaJMUsEXr6kWmIGwH0geoX76ULj1k35oV1Xdoc9yj2kUNW+FUsXlMwGCCnwBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"45a73fce7377dfc3bf32415906a8db45c25cd58a5741eaaed03acde496c70bbf","last_reissued_at":"2026-06-10T01:10:39.143271Z","signature_status":"signed_v1","first_computed_at":"2026-06-10T01:10:39.143271Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.10760","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-06-10T01:10:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iAmeEpHmCXT0bbdGB2dHtySMkmecGY0c/2zSzNyRVBAWQJf3IngJXgvrXvE7EALAZON2XvOvQxzpZ5RD57HaAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T06:36:21.510202Z"},"content_sha256":"8d0ab0f3c5e90dfcf92d428232e3835c8e1252e2995e46f435bb421f9d2f366c","schema_version":"1.0","event_id":"sha256:8d0ab0f3c5e90dfcf92d428232e3835c8e1252e2995e46f435bb421f9d2f366c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:IWTT7TTTO7P4HPZSIFMQNKG3IX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"SUPPPPRESS: Prototyping and testing liquid-crystal vector vortex coronagraphs with reduced polarization leakage","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP"],"primary_cat":"astro-ph.IM","authors_text":"Alexander Eigenraam, Axel Potier, Chris van Dijk, David Doelman, Felix Bettonvil, Frans Snik, Iva Laginja, Jeroen Rietjens, Johan Mazoyer, Joost van den Born, Kristien Peeters, Mario Vretenar, Mariya Krasteva, Matteo Taccola, Pierre Baudoz, Rapha\\\"el Galicher, Rico Landman, Yuki Nishie, Yuta Watanabe","submitted_at":"2026-06-09T12:12:33Z","abstract_excerpt":"The vortex coronagraph is one of the most promising candidates for the Habitable Worlds Observatory (HWO) due to its excellent theoretical performance for an off-axis telescope. A practical realization can be achieved using liquid-crystal polymers to form a vector vortex coronagraph (VVC). Reaching the $10^{-10}$ contrast required for Earth-like planet detection is, however, limited by polarization leakage caused by wavelength-dependent deviations from half-wave retardance. This effect can be mitigated using multi-layer twisted retarders to minimize leakage, and by combining the VVC with multi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.10760","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2606.10760/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-06-10T01:10:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MBJvFsARoV+nh/M9Tv3QPh7uxC9gXeWfjUDvgBKLNWb0T9D0LnY9bo3QPBh1NVkryaDj1/zzqqLSlm1RxBGUCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T06:36:21.510597Z"},"content_sha256":"4244cf7ccbad7f66aa4fd795c51d7c91c65a5e5ed69f821be1b585900a1b5d7e","schema_version":"1.0","event_id":"sha256:4244cf7ccbad7f66aa4fd795c51d7c91c65a5e5ed69f821be1b585900a1b5d7e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IWTT7TTTO7P4HPZSIFMQNKG3IX/bundle.json","state_url":"https://pith.science/pith/IWTT7TTTO7P4HPZSIFMQNKG3IX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IWTT7TTTO7P4HPZSIFMQNKG3IX/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-26T06:36:21Z","links":{"resolver":"https://pith.science/pith/IWTT7TTTO7P4HPZSIFMQNKG3IX","bundle":"https://pith.science/pith/IWTT7TTTO7P4HPZSIFMQNKG3IX/bundle.json","state":"https://pith.science/pith/IWTT7TTTO7P4HPZSIFMQNKG3IX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IWTT7TTTO7P4HPZSIFMQNKG3IX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:IWTT7TTTO7P4HPZSIFMQNKG3IX","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":"a7c5b912045e2d62c213839a2dcc685dd94e15f557e2436669e21337eb304b32","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2026-06-09T12:12:33Z","title_canon_sha256":"ce59b122dd6f80fac65b97f33f2fab3b01b6f6c658869dd4caf4886d17dfd6ca"},"schema_version":"1.0","source":{"id":"2606.10760","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.10760","created_at":"2026-06-10T01:10:39Z"},{"alias_kind":"arxiv_version","alias_value":"2606.10760v1","created_at":"2026-06-10T01:10:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.10760","created_at":"2026-06-10T01:10:39Z"},{"alias_kind":"pith_short_12","alias_value":"IWTT7TTTO7P4","created_at":"2026-06-10T01:10:39Z"},{"alias_kind":"pith_short_16","alias_value":"IWTT7TTTO7P4HPZS","created_at":"2026-06-10T01:10:39Z"},{"alias_kind":"pith_short_8","alias_value":"IWTT7TTT","created_at":"2026-06-10T01:10:39Z"}],"graph_snapshots":[{"event_id":"sha256:4244cf7ccbad7f66aa4fd795c51d7c91c65a5e5ed69f821be1b585900a1b5d7e","target":"graph","created_at":"2026-06-10T01:10:39Z","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/2606.10760/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The vortex coronagraph is one of the most promising candidates for the Habitable Worlds Observatory (HWO) due to its excellent theoretical performance for an off-axis telescope. A practical realization can be achieved using liquid-crystal polymers to form a vector vortex coronagraph (VVC). Reaching the $10^{-10}$ contrast required for Earth-like planet detection is, however, limited by polarization leakage caused by wavelength-dependent deviations from half-wave retardance. This effect can be mitigated using multi-layer twisted retarders to minimize leakage, and by combining the VVC with multi","authors_text":"Alexander Eigenraam, Axel Potier, Chris van Dijk, David Doelman, Felix Bettonvil, Frans Snik, Iva Laginja, Jeroen Rietjens, Johan Mazoyer, Joost van den Born, Kristien Peeters, Mario Vretenar, Mariya Krasteva, Matteo Taccola, Pierre Baudoz, Rapha\\\"el Galicher, Rico Landman, Yuki Nishie, Yuta Watanabe","cross_cats":["astro-ph.EP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2026-06-09T12:12:33Z","title":"SUPPPPRESS: Prototyping and testing liquid-crystal vector vortex coronagraphs with reduced polarization leakage"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.10760","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":"sha256:8d0ab0f3c5e90dfcf92d428232e3835c8e1252e2995e46f435bb421f9d2f366c","target":"record","created_at":"2026-06-10T01:10:39Z","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":"a7c5b912045e2d62c213839a2dcc685dd94e15f557e2436669e21337eb304b32","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2026-06-09T12:12:33Z","title_canon_sha256":"ce59b122dd6f80fac65b97f33f2fab3b01b6f6c658869dd4caf4886d17dfd6ca"},"schema_version":"1.0","source":{"id":"2606.10760","kind":"arxiv","version":1}},"canonical_sha256":"45a73fce7377dfc3bf32415906a8db45c25cd58a5741eaaed03acde496c70bbf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"45a73fce7377dfc3bf32415906a8db45c25cd58a5741eaaed03acde496c70bbf","first_computed_at":"2026-06-10T01:10:39.143271Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-10T01:10:39.143271Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"U4PxOq6S+RMr4gwG4+gkg1w5MFaJMUsEXr6kWmIGwH0geoX76ULj1k35oV1Xdoc9yj2kUNW+FUsXlMwGCCnwBQ==","signature_status":"signed_v1","signed_at":"2026-06-10T01:10:39.144111Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.10760","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8d0ab0f3c5e90dfcf92d428232e3835c8e1252e2995e46f435bb421f9d2f366c","sha256:4244cf7ccbad7f66aa4fd795c51d7c91c65a5e5ed69f821be1b585900a1b5d7e"],"state_sha256":"d22464ec145186e58f3a84f50394a3d60d473eecb2302230b3b874ee1a63c4bb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xG9MrVyeaYRQfCiT6LTWa1urbXY39CBveXYs06nwuRKD0rtbnQp5kBloGcX+1xvPVO9+lEn+DnVbF+cfBzRhAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-26T06:36:21.512723Z","bundle_sha256":"0e41b5e97d5c8e32dd3e50a82801be27d6b6d3266e7ca9bf43ec35339d141a27"}}