{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:KTRPTI4HVFGQA2XRC3RSLUMK7N","short_pith_number":"pith:KTRPTI4H","canonical_record":{"source":{"id":"1006.4145","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2010-06-21T19:41:14Z","cross_cats_sorted":[],"title_canon_sha256":"850cbbdcbdea74d99ac26e6216b8dd14dacf97d24eeadb10c224750033c8c826","abstract_canon_sha256":"acdf782e53ddfb3885e7e150b217cd0cce5d3e71fab6fa390a59d582fba2cbde"},"schema_version":"1.0"},"canonical_sha256":"54e2f9a387a94d006af116e325d18afb44ce83df322dd1ab0c44bebd02dee72c","source":{"kind":"arxiv","id":"1006.4145","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1006.4145","created_at":"2026-05-18T04:25:37Z"},{"alias_kind":"arxiv_version","alias_value":"1006.4145v2","created_at":"2026-05-18T04:25:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1006.4145","created_at":"2026-05-18T04:25:37Z"},{"alias_kind":"pith_short_12","alias_value":"KTRPTI4HVFGQ","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_16","alias_value":"KTRPTI4HVFGQA2XR","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_8","alias_value":"KTRPTI4H","created_at":"2026-05-18T12:26:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:KTRPTI4HVFGQA2XRC3RSLUMK7N","target":"record","payload":{"canonical_record":{"source":{"id":"1006.4145","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2010-06-21T19:41:14Z","cross_cats_sorted":[],"title_canon_sha256":"850cbbdcbdea74d99ac26e6216b8dd14dacf97d24eeadb10c224750033c8c826","abstract_canon_sha256":"acdf782e53ddfb3885e7e150b217cd0cce5d3e71fab6fa390a59d582fba2cbde"},"schema_version":"1.0"},"canonical_sha256":"54e2f9a387a94d006af116e325d18afb44ce83df322dd1ab0c44bebd02dee72c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:25:37.838437Z","signature_b64":"RK4Sep07U4bpODVGpeZmpIGgX++RHReGnNSGhWmNnyYm9vNCq/8/A8YpVXem4IlOlOOKGkWKuuL5AOlJR3lGAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"54e2f9a387a94d006af116e325d18afb44ce83df322dd1ab0c44bebd02dee72c","last_reissued_at":"2026-05-18T04:25:37.837998Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:25:37.837998Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1006.4145","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:25:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iSRPLdr/SK61LBULWDDB1lKMHH4EMJ74woSCgXRVfxPpLj0vzFAGa0xkRY96NMkPHEXTwNRhY0IFtq2etUQgAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-29T13:46:23.330821Z"},"content_sha256":"9c9dc0c794965b4b7e9d2f36b5a240292db6b1a6e16da660f19a2bb48e59b8b9","schema_version":"1.0","event_id":"sha256:9c9dc0c794965b4b7e9d2f36b5a240292db6b1a6e16da660f19a2bb48e59b8b9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:KTRPTI4HVFGQA2XRC3RSLUMK7N","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Calculated Ellipsometry of the VLTI AT mirror train","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Richard J. Mathar","submitted_at":"2010-06-21T19:41:14Z","abstract_excerpt":"The polarization effect of the 31 reflections within the mirror train of an auxiliary telescope of the Very Large Telescope Interferometer is calculated as a function of pointing direction and rotator angle. With a rough estimate of the mean complex index of refraction of the reflecting surfaces, their Jones matrices are concatenated while tracing a ray from M1 up to the feeding mirror in front of an instrument. The net effect is summarized in terms of the axis ratio of the polarization ellipse of star light that was circularly polarized above the primary mirror."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1006.4145","kind":"arxiv","version":2},"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":"2026-05-18T04:25:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YhWm+S2fRXQOs28nvjTB4YZCa92X43BrrGRjSk0qsbMqirux9sJRQ1YRTA4hRGQeD1lW7ZuPIMrNi/vBzbACBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-29T13:46:23.331157Z"},"content_sha256":"21df61c7b676decd860c8bcbb6802d2079968d59fcecea3a1fcc6804bab6ea50","schema_version":"1.0","event_id":"sha256:21df61c7b676decd860c8bcbb6802d2079968d59fcecea3a1fcc6804bab6ea50"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KTRPTI4HVFGQA2XRC3RSLUMK7N/bundle.json","state_url":"https://pith.science/pith/KTRPTI4HVFGQA2XRC3RSLUMK7N/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KTRPTI4HVFGQA2XRC3RSLUMK7N/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":"2026-06-29T13:46:23Z","links":{"resolver":"https://pith.science/pith/KTRPTI4HVFGQA2XRC3RSLUMK7N","bundle":"https://pith.science/pith/KTRPTI4HVFGQA2XRC3RSLUMK7N/bundle.json","state":"https://pith.science/pith/KTRPTI4HVFGQA2XRC3RSLUMK7N/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KTRPTI4HVFGQA2XRC3RSLUMK7N/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:KTRPTI4HVFGQA2XRC3RSLUMK7N","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":"acdf782e53ddfb3885e7e150b217cd0cce5d3e71fab6fa390a59d582fba2cbde","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2010-06-21T19:41:14Z","title_canon_sha256":"850cbbdcbdea74d99ac26e6216b8dd14dacf97d24eeadb10c224750033c8c826"},"schema_version":"1.0","source":{"id":"1006.4145","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1006.4145","created_at":"2026-05-18T04:25:37Z"},{"alias_kind":"arxiv_version","alias_value":"1006.4145v2","created_at":"2026-05-18T04:25:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1006.4145","created_at":"2026-05-18T04:25:37Z"},{"alias_kind":"pith_short_12","alias_value":"KTRPTI4HVFGQ","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_16","alias_value":"KTRPTI4HVFGQA2XR","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_8","alias_value":"KTRPTI4H","created_at":"2026-05-18T12:26:09Z"}],"graph_snapshots":[{"event_id":"sha256:21df61c7b676decd860c8bcbb6802d2079968d59fcecea3a1fcc6804bab6ea50","target":"graph","created_at":"2026-05-18T04:25:37Z","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":"The polarization effect of the 31 reflections within the mirror train of an auxiliary telescope of the Very Large Telescope Interferometer is calculated as a function of pointing direction and rotator angle. With a rough estimate of the mean complex index of refraction of the reflecting surfaces, their Jones matrices are concatenated while tracing a ray from M1 up to the feeding mirror in front of an instrument. The net effect is summarized in terms of the axis ratio of the polarization ellipse of star light that was circularly polarized above the primary mirror.","authors_text":"Richard J. Mathar","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2010-06-21T19:41:14Z","title":"Calculated Ellipsometry of the VLTI AT mirror train"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1006.4145","kind":"arxiv","version":2},"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":"sha256:9c9dc0c794965b4b7e9d2f36b5a240292db6b1a6e16da660f19a2bb48e59b8b9","target":"record","created_at":"2026-05-18T04:25:37Z","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":"acdf782e53ddfb3885e7e150b217cd0cce5d3e71fab6fa390a59d582fba2cbde","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2010-06-21T19:41:14Z","title_canon_sha256":"850cbbdcbdea74d99ac26e6216b8dd14dacf97d24eeadb10c224750033c8c826"},"schema_version":"1.0","source":{"id":"1006.4145","kind":"arxiv","version":2}},"canonical_sha256":"54e2f9a387a94d006af116e325d18afb44ce83df322dd1ab0c44bebd02dee72c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"54e2f9a387a94d006af116e325d18afb44ce83df322dd1ab0c44bebd02dee72c","first_computed_at":"2026-05-18T04:25:37.837998Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:25:37.837998Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RK4Sep07U4bpODVGpeZmpIGgX++RHReGnNSGhWmNnyYm9vNCq/8/A8YpVXem4IlOlOOKGkWKuuL5AOlJR3lGAA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:25:37.838437Z","signed_message":"canonical_sha256_bytes"},"source_id":"1006.4145","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9c9dc0c794965b4b7e9d2f36b5a240292db6b1a6e16da660f19a2bb48e59b8b9","sha256:21df61c7b676decd860c8bcbb6802d2079968d59fcecea3a1fcc6804bab6ea50"],"state_sha256":"2ac8d31488fbc57afd9418dd4f6a4b0bdf5680c9d8ac253f421ca17e80b3df36"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OBhuQDOF+nERwp1H7UrZgUDNESv1Bz0UKADYFZM4hA3DGM2XkN1un0/6deoXD5rpKU6V5qys2w7rdSmrGLkwCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-29T13:46:23.332951Z","bundle_sha256":"d9e5200a3a6bdc20161df5fa48e2ee69f0338f452b10ebf2f175455b68fb5342"}}