{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:J5EO2DFCR2LQ3R7OQGTYP3N7VU","short_pith_number":"pith:J5EO2DFC","canonical_record":{"source":{"id":"1305.6459","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2013-05-28T11:49:26Z","cross_cats_sorted":[],"title_canon_sha256":"0903050af847cc1d63606b4cfe76572e7dd0e312d0b9e791eb7b9ca568a9161f","abstract_canon_sha256":"c90c2956fcdd5c3b6936194e0caf6409f70755ea64fe447df8a3a1a648d5007c"},"schema_version":"1.0"},"canonical_sha256":"4f48ed0ca28e970dc7ee81a787edbfad187d2d179929f518b6a52e52615c0962","source":{"kind":"arxiv","id":"1305.6459","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1305.6459","created_at":"2026-05-18T03:24:40Z"},{"alias_kind":"arxiv_version","alias_value":"1305.6459v1","created_at":"2026-05-18T03:24:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1305.6459","created_at":"2026-05-18T03:24:40Z"},{"alias_kind":"pith_short_12","alias_value":"J5EO2DFCR2LQ","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_16","alias_value":"J5EO2DFCR2LQ3R7O","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_8","alias_value":"J5EO2DFC","created_at":"2026-05-18T12:27:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:J5EO2DFCR2LQ3R7OQGTYP3N7VU","target":"record","payload":{"canonical_record":{"source":{"id":"1305.6459","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2013-05-28T11:49:26Z","cross_cats_sorted":[],"title_canon_sha256":"0903050af847cc1d63606b4cfe76572e7dd0e312d0b9e791eb7b9ca568a9161f","abstract_canon_sha256":"c90c2956fcdd5c3b6936194e0caf6409f70755ea64fe447df8a3a1a648d5007c"},"schema_version":"1.0"},"canonical_sha256":"4f48ed0ca28e970dc7ee81a787edbfad187d2d179929f518b6a52e52615c0962","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:24:40.706728Z","signature_b64":"IYK7RmKyZWdapjDwGKwcMhw6b7eWO7u7AP76iXfqlP7qeg5qLzZY3XEd3Df69lUIJfYunyf7qyfUU8C/1ML3Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4f48ed0ca28e970dc7ee81a787edbfad187d2d179929f518b6a52e52615c0962","last_reissued_at":"2026-05-18T03:24:40.706074Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:24:40.706074Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1305.6459","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":"2026-05-18T03:24:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cPvwb/ImT58Dasjea2pbaX3ZHVTwdbz2HJ0Y6V8XnlWzadb5iRNXVzB9l7A5a7IcHMycw7bmsCttaeZUMfycAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T22:50:49.787156Z"},"content_sha256":"945046deea32e62b72fc1f846eb3aaee1df89a5fd7e0a3a4c93518cf81081ec8","schema_version":"1.0","event_id":"sha256:945046deea32e62b72fc1f846eb3aaee1df89a5fd7e0a3a4c93518cf81081ec8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:J5EO2DFCR2LQ3R7OQGTYP3N7VU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Parasitic interference in nulling interferometry","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Alexis Matter, Bruno Lopez, Denis Defr\\`ere, Olivier Absil, William C. Danchi","submitted_at":"2013-05-28T11:49:26Z","abstract_excerpt":"Nulling interferometry aims to detect faint objects close to bright stars. Its principle is to produce a destructive interference along the line-of-sight so that the stellar flux is rejected, while the flux of the off-axis source can be transmitted. In practice, various instrumental perturbations can degrade the nulling performance. Any imperfection in phase, amplitude, or polarization produces a spurious flux that leaks to the interferometer output and corrupts the transmitted off-axis flux. One of these instrumental pertubations is the crosstalk phenomenon, which occurs because of multiple p"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1305.6459","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":""},"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":"2026-05-18T03:24:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nwePoH3j+8d7D/JUgF8aV4B3+EFIJOwgeC4ewG7Iu+oVCnjr/ET3nYq7isyrb9AlOce9URFicuwAOpl98HS5Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T22:50:49.787545Z"},"content_sha256":"83a1a756ab4a36a13e3343bfe08bd69a4f0e5ea7a760fc2ddfbce8df3940371d","schema_version":"1.0","event_id":"sha256:83a1a756ab4a36a13e3343bfe08bd69a4f0e5ea7a760fc2ddfbce8df3940371d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/J5EO2DFCR2LQ3R7OQGTYP3N7VU/bundle.json","state_url":"https://pith.science/pith/J5EO2DFCR2LQ3R7OQGTYP3N7VU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/J5EO2DFCR2LQ3R7OQGTYP3N7VU/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":"2026-05-25T22:50:49Z","links":{"resolver":"https://pith.science/pith/J5EO2DFCR2LQ3R7OQGTYP3N7VU","bundle":"https://pith.science/pith/J5EO2DFCR2LQ3R7OQGTYP3N7VU/bundle.json","state":"https://pith.science/pith/J5EO2DFCR2LQ3R7OQGTYP3N7VU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/J5EO2DFCR2LQ3R7OQGTYP3N7VU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:J5EO2DFCR2LQ3R7OQGTYP3N7VU","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":"c90c2956fcdd5c3b6936194e0caf6409f70755ea64fe447df8a3a1a648d5007c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2013-05-28T11:49:26Z","title_canon_sha256":"0903050af847cc1d63606b4cfe76572e7dd0e312d0b9e791eb7b9ca568a9161f"},"schema_version":"1.0","source":{"id":"1305.6459","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1305.6459","created_at":"2026-05-18T03:24:40Z"},{"alias_kind":"arxiv_version","alias_value":"1305.6459v1","created_at":"2026-05-18T03:24:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1305.6459","created_at":"2026-05-18T03:24:40Z"},{"alias_kind":"pith_short_12","alias_value":"J5EO2DFCR2LQ","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_16","alias_value":"J5EO2DFCR2LQ3R7O","created_at":"2026-05-18T12:27:49Z"},{"alias_kind":"pith_short_8","alias_value":"J5EO2DFC","created_at":"2026-05-18T12:27:49Z"}],"graph_snapshots":[{"event_id":"sha256:83a1a756ab4a36a13e3343bfe08bd69a4f0e5ea7a760fc2ddfbce8df3940371d","target":"graph","created_at":"2026-05-18T03:24:40Z","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":"Nulling interferometry aims to detect faint objects close to bright stars. Its principle is to produce a destructive interference along the line-of-sight so that the stellar flux is rejected, while the flux of the off-axis source can be transmitted. In practice, various instrumental perturbations can degrade the nulling performance. Any imperfection in phase, amplitude, or polarization produces a spurious flux that leaks to the interferometer output and corrupts the transmitted off-axis flux. One of these instrumental pertubations is the crosstalk phenomenon, which occurs because of multiple p","authors_text":"Alexis Matter, Bruno Lopez, Denis Defr\\`ere, Olivier Absil, William C. Danchi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2013-05-28T11:49:26Z","title":"Parasitic interference in nulling interferometry"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1305.6459","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":"sha256:945046deea32e62b72fc1f846eb3aaee1df89a5fd7e0a3a4c93518cf81081ec8","target":"record","created_at":"2026-05-18T03:24:40Z","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":"c90c2956fcdd5c3b6936194e0caf6409f70755ea64fe447df8a3a1a648d5007c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2013-05-28T11:49:26Z","title_canon_sha256":"0903050af847cc1d63606b4cfe76572e7dd0e312d0b9e791eb7b9ca568a9161f"},"schema_version":"1.0","source":{"id":"1305.6459","kind":"arxiv","version":1}},"canonical_sha256":"4f48ed0ca28e970dc7ee81a787edbfad187d2d179929f518b6a52e52615c0962","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4f48ed0ca28e970dc7ee81a787edbfad187d2d179929f518b6a52e52615c0962","first_computed_at":"2026-05-18T03:24:40.706074Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:24:40.706074Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"IYK7RmKyZWdapjDwGKwcMhw6b7eWO7u7AP76iXfqlP7qeg5qLzZY3XEd3Df69lUIJfYunyf7qyfUU8C/1ML3Cg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:24:40.706728Z","signed_message":"canonical_sha256_bytes"},"source_id":"1305.6459","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:945046deea32e62b72fc1f846eb3aaee1df89a5fd7e0a3a4c93518cf81081ec8","sha256:83a1a756ab4a36a13e3343bfe08bd69a4f0e5ea7a760fc2ddfbce8df3940371d"],"state_sha256":"74018c1feeff8ef6a7a0140f17224e346b8be07e7fb8d435a77b9e8bf4d2c7e0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7wmAfa+Ir6OCsoGY4cQ+orAreAgCjGLNmZIAI5ZbTQmqaPmz63JnsZffFKixtktVaLqfp8TPXEGatSAWKfI5Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T22:50:49.790082Z","bundle_sha256":"782f45588eb445bcac42100bf973e48b140e9f90e799498658e63aa9cfe05059"}}