{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:A5NXKVRTNNDX6UAYZQLQO6GMP5","short_pith_number":"pith:A5NXKVRT","canonical_record":{"source":{"id":"2411.13746","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2024-11-20T23:06:07Z","cross_cats_sorted":[],"title_canon_sha256":"ce5d395f584c56e06a0629e8a76914b6528772d50ad71f5b66de17b9f9355767","abstract_canon_sha256":"3e004c921d71aee5f7b4bea4db199ef8c95b1e7824b52c1441566a8bbc396d1a"},"schema_version":"1.0"},"canonical_sha256":"075b7556336b477f5018cc170778cc7f74bf68a3abada490805e359132672ee4","source":{"kind":"arxiv","id":"2411.13746","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2411.13746","created_at":"2026-07-05T09:38:36Z"},{"alias_kind":"arxiv_version","alias_value":"2411.13746v1","created_at":"2026-07-05T09:38:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2411.13746","created_at":"2026-07-05T09:38:36Z"},{"alias_kind":"pith_short_12","alias_value":"A5NXKVRTNNDX","created_at":"2026-07-05T09:38:36Z"},{"alias_kind":"pith_short_16","alias_value":"A5NXKVRTNNDX6UAY","created_at":"2026-07-05T09:38:36Z"},{"alias_kind":"pith_short_8","alias_value":"A5NXKVRT","created_at":"2026-07-05T09:38:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:A5NXKVRTNNDX6UAYZQLQO6GMP5","target":"record","payload":{"canonical_record":{"source":{"id":"2411.13746","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2024-11-20T23:06:07Z","cross_cats_sorted":[],"title_canon_sha256":"ce5d395f584c56e06a0629e8a76914b6528772d50ad71f5b66de17b9f9355767","abstract_canon_sha256":"3e004c921d71aee5f7b4bea4db199ef8c95b1e7824b52c1441566a8bbc396d1a"},"schema_version":"1.0"},"canonical_sha256":"075b7556336b477f5018cc170778cc7f74bf68a3abada490805e359132672ee4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T09:38:36.647171Z","signature_b64":"JRJcFQ5vjYyqMDJrr/9VhWEUYn/th0dvX+trPHtjS7KYJFarSK9aJCrzcZZwXIwOA/rckWrS3/6VPLTCqCc/Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"075b7556336b477f5018cc170778cc7f74bf68a3abada490805e359132672ee4","last_reissued_at":"2026-07-05T09:38:36.646711Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T09:38:36.646711Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2411.13746","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":"2026-07-05T09:38:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+PsidD9+R0ap5LurnZruoZyFPX7ewb80GEKSzAQAwD9Mr8FUjOu3La4caksBRtugGGr1zgCr6mBo5bJektLCAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-13T04:41:32.057666Z"},"content_sha256":"2b454fe0716dcefc77af232936a5d5759d3e8aca49f72ebb267ba49d115f901b","schema_version":"1.0","event_id":"sha256:2b454fe0716dcefc77af232936a5d5759d3e8aca49f72ebb267ba49d115f901b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:A5NXKVRTNNDX6UAYZQLQO6GMP5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Polarization effects on high contrast imaging: measurements on THD2 Bench","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Celia Desgrange, Iva Laginja, Pierre Baudoz, Rapha\\\"el Galicher","submitted_at":"2024-11-20T23:06:07Z","abstract_excerpt":"The spectroscopic study of mature giant planets and low mass planets (Neptune-like, Earth-like) requires instruments capable of achieving very high contrasts ($10^{-10}-10^{-11}$) at short angular separations. To achieve such high performance on a real instrument, many limitations must be overcome: complex component defects (coronagraph, deformable mirror), optical aberrations and scattering, mechanical vibrations and drifts, polarization effects, etc.\n  To study the overall impact on a complete system representative of high contrast instruments, we have developed a test bench at Paris Observa"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2411.13746","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/2411.13746/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":"2026-07-05T09:38:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"M0Z+gcgAW5JLMIau/rHf2zLFtjRYy73yq3X9Xk/G9OUQDxs9hCoRr7hGjdmA6DFJ8F5vRDv0OY4GzT0Crl+1BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-13T04:41:32.058638Z"},"content_sha256":"32397f05fc6eb62c97684c9a20a3a92a2041c36fff8a9a24bd06a1d6c760bb66","schema_version":"1.0","event_id":"sha256:32397f05fc6eb62c97684c9a20a3a92a2041c36fff8a9a24bd06a1d6c760bb66"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/A5NXKVRTNNDX6UAYZQLQO6GMP5/bundle.json","state_url":"https://pith.science/pith/A5NXKVRTNNDX6UAYZQLQO6GMP5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/A5NXKVRTNNDX6UAYZQLQO6GMP5/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":"2026-08-13T04:41:32Z","links":{"resolver":"https://pith.science/pith/A5NXKVRTNNDX6UAYZQLQO6GMP5","bundle":"https://pith.science/pith/A5NXKVRTNNDX6UAYZQLQO6GMP5/bundle.json","state":"https://pith.science/pith/A5NXKVRTNNDX6UAYZQLQO6GMP5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/A5NXKVRTNNDX6UAYZQLQO6GMP5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:A5NXKVRTNNDX6UAYZQLQO6GMP5","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":"3e004c921d71aee5f7b4bea4db199ef8c95b1e7824b52c1441566a8bbc396d1a","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2024-11-20T23:06:07Z","title_canon_sha256":"ce5d395f584c56e06a0629e8a76914b6528772d50ad71f5b66de17b9f9355767"},"schema_version":"1.0","source":{"id":"2411.13746","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2411.13746","created_at":"2026-07-05T09:38:36Z"},{"alias_kind":"arxiv_version","alias_value":"2411.13746v1","created_at":"2026-07-05T09:38:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2411.13746","created_at":"2026-07-05T09:38:36Z"},{"alias_kind":"pith_short_12","alias_value":"A5NXKVRTNNDX","created_at":"2026-07-05T09:38:36Z"},{"alias_kind":"pith_short_16","alias_value":"A5NXKVRTNNDX6UAY","created_at":"2026-07-05T09:38:36Z"},{"alias_kind":"pith_short_8","alias_value":"A5NXKVRT","created_at":"2026-07-05T09:38:36Z"}],"graph_snapshots":[{"event_id":"sha256:32397f05fc6eb62c97684c9a20a3a92a2041c36fff8a9a24bd06a1d6c760bb66","target":"graph","created_at":"2026-07-05T09:38:36Z","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/2411.13746/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The spectroscopic study of mature giant planets and low mass planets (Neptune-like, Earth-like) requires instruments capable of achieving very high contrasts ($10^{-10}-10^{-11}$) at short angular separations. To achieve such high performance on a real instrument, many limitations must be overcome: complex component defects (coronagraph, deformable mirror), optical aberrations and scattering, mechanical vibrations and drifts, polarization effects, etc.\n  To study the overall impact on a complete system representative of high contrast instruments, we have developed a test bench at Paris Observa","authors_text":"Celia Desgrange, Iva Laginja, Pierre Baudoz, Rapha\\\"el Galicher","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2024-11-20T23:06:07Z","title":"Polarization effects on high contrast imaging: measurements on THD2 Bench"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2411.13746","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":"sha256:2b454fe0716dcefc77af232936a5d5759d3e8aca49f72ebb267ba49d115f901b","target":"record","created_at":"2026-07-05T09:38:36Z","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":"3e004c921d71aee5f7b4bea4db199ef8c95b1e7824b52c1441566a8bbc396d1a","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2024-11-20T23:06:07Z","title_canon_sha256":"ce5d395f584c56e06a0629e8a76914b6528772d50ad71f5b66de17b9f9355767"},"schema_version":"1.0","source":{"id":"2411.13746","kind":"arxiv","version":1}},"canonical_sha256":"075b7556336b477f5018cc170778cc7f74bf68a3abada490805e359132672ee4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"075b7556336b477f5018cc170778cc7f74bf68a3abada490805e359132672ee4","first_computed_at":"2026-07-05T09:38:36.646711Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T09:38:36.646711Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JRJcFQ5vjYyqMDJrr/9VhWEUYn/th0dvX+trPHtjS7KYJFarSK9aJCrzcZZwXIwOA/rckWrS3/6VPLTCqCc/Dw==","signature_status":"signed_v1","signed_at":"2026-07-05T09:38:36.647171Z","signed_message":"canonical_sha256_bytes"},"source_id":"2411.13746","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2b454fe0716dcefc77af232936a5d5759d3e8aca49f72ebb267ba49d115f901b","sha256:32397f05fc6eb62c97684c9a20a3a92a2041c36fff8a9a24bd06a1d6c760bb66"],"state_sha256":"e1a0f3413317fe709c9a2ae97d14f14ee9db38275c60b1981e3ac9a64dc76a2b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Z/0AdQPRsclXE5OnqxRtE3RoIvvlyeVshdOHTAM1C0QDx/t3YrcmW8T2xTcL1w26eIbFYs60DRGexwAu1aeCAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-13T04:41:32.065120Z","bundle_sha256":"2a66f9c2dd66fe15460807ca97058aae737901a2c016ce32d53fcc5e775f685e"}}