{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:PYQXLJZVCQ5PXIX34R2QEXPRZJ","short_pith_number":"pith:PYQXLJZV","canonical_record":{"source":{"id":"1102.2911","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-02-14T21:58:04Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"5f7732d26a487c845bb521c0c21452a2792b069c37ab006cc34d8b65645d1f89","abstract_canon_sha256":"ad3d96820a6dd22bed0ec4b82679b76ffab19d990c8beef31e30bb0b97f871c9"},"schema_version":"1.0"},"canonical_sha256":"7e2175a735143afba2fbe475025df1ca56d0e9e74332a111338f58c9d9dfe75d","source":{"kind":"arxiv","id":"1102.2911","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1102.2911","created_at":"2026-05-18T02:03:11Z"},{"alias_kind":"arxiv_version","alias_value":"1102.2911v1","created_at":"2026-05-18T02:03:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1102.2911","created_at":"2026-05-18T02:03:11Z"},{"alias_kind":"pith_short_12","alias_value":"PYQXLJZVCQ5P","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_16","alias_value":"PYQXLJZVCQ5PXIX3","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_8","alias_value":"PYQXLJZV","created_at":"2026-05-18T12:26:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:PYQXLJZVCQ5PXIX34R2QEXPRZJ","target":"record","payload":{"canonical_record":{"source":{"id":"1102.2911","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-02-14T21:58:04Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"5f7732d26a487c845bb521c0c21452a2792b069c37ab006cc34d8b65645d1f89","abstract_canon_sha256":"ad3d96820a6dd22bed0ec4b82679b76ffab19d990c8beef31e30bb0b97f871c9"},"schema_version":"1.0"},"canonical_sha256":"7e2175a735143afba2fbe475025df1ca56d0e9e74332a111338f58c9d9dfe75d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:03:11.160464Z","signature_b64":"OtWV4LDeo2YdEKvVi3nTyba1KsejdJQ0FtNjNPbRvnDTCqAqi30uKAGlj63lCsqo09Xu6eurbsRyELIuR6jjBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7e2175a735143afba2fbe475025df1ca56d0e9e74332a111338f58c9d9dfe75d","last_reissued_at":"2026-05-18T02:03:11.159938Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:03:11.159938Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1102.2911","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":"2026-05-18T02:03:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BebYlryW4mOTb9DG/ULwFJu19nFQQaI+iYHij2FrDNUeQYeIEztTBJS+ZMpUpxWochTYAX/Op7iHC1Dhzb/wBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T05:36:06.779586Z"},"content_sha256":"627117a1a1075b604ca08e39b755fc573324040cc95d5fe370320c7c889507d4","schema_version":"1.0","event_id":"sha256:627117a1a1075b604ca08e39b755fc573324040cc95d5fe370320c7c889507d4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:PYQXLJZVCQ5PXIX34R2QEXPRZJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Development and Performance of the PHOT (Portable High-Speed Occultation Telescope) Systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP"],"primary_cat":"astro-ph.IM","authors_text":"C. B. Olkin, E. F. Young, J. Regester, K. Shoemaker, L. A. Young, M. W. Buie, R. G. French","submitted_at":"2011-02-14T21:58:04Z","abstract_excerpt":"The PHOT (Portable High-Speed Occultation Telescope) systems were developed for the specific purpose of observing stellar occultations by solar system objects. Stellar occultations have unique observing constraints: they may only be observable from certain parts of the globe; they often require a rapid observing cadence; and they require accurate timestamp information for each exposure. The PHOT systems consist of 14\" telescopes, CCD cameras, camera mounting plates, GPS-based time standards, and data acquisition computers. The PHOT systems are similar in principle to the POETS systems (Portabl"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1102.2911","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":"2026-05-18T02:03:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SYQWnCNqBvuLvCVeqR6fgegvQmatTBDb255++1yfLQaCvAFiQXELr4JFFQhfaPwufpruphTWHP8c2h2y216jCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T05:36:06.779949Z"},"content_sha256":"7b222b47989b31c7db53ba02831d28ea6588a4ad0c7550dd128f43449d389329","schema_version":"1.0","event_id":"sha256:7b222b47989b31c7db53ba02831d28ea6588a4ad0c7550dd128f43449d389329"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PYQXLJZVCQ5PXIX34R2QEXPRZJ/bundle.json","state_url":"https://pith.science/pith/PYQXLJZVCQ5PXIX34R2QEXPRZJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PYQXLJZVCQ5PXIX34R2QEXPRZJ/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":"2026-06-09T05:36:06Z","links":{"resolver":"https://pith.science/pith/PYQXLJZVCQ5PXIX34R2QEXPRZJ","bundle":"https://pith.science/pith/PYQXLJZVCQ5PXIX34R2QEXPRZJ/bundle.json","state":"https://pith.science/pith/PYQXLJZVCQ5PXIX34R2QEXPRZJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PYQXLJZVCQ5PXIX34R2QEXPRZJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:PYQXLJZVCQ5PXIX34R2QEXPRZJ","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":"ad3d96820a6dd22bed0ec4b82679b76ffab19d990c8beef31e30bb0b97f871c9","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-02-14T21:58:04Z","title_canon_sha256":"5f7732d26a487c845bb521c0c21452a2792b069c37ab006cc34d8b65645d1f89"},"schema_version":"1.0","source":{"id":"1102.2911","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1102.2911","created_at":"2026-05-18T02:03:11Z"},{"alias_kind":"arxiv_version","alias_value":"1102.2911v1","created_at":"2026-05-18T02:03:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1102.2911","created_at":"2026-05-18T02:03:11Z"},{"alias_kind":"pith_short_12","alias_value":"PYQXLJZVCQ5P","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_16","alias_value":"PYQXLJZVCQ5PXIX3","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_8","alias_value":"PYQXLJZV","created_at":"2026-05-18T12:26:39Z"}],"graph_snapshots":[{"event_id":"sha256:7b222b47989b31c7db53ba02831d28ea6588a4ad0c7550dd128f43449d389329","target":"graph","created_at":"2026-05-18T02:03:11Z","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 PHOT (Portable High-Speed Occultation Telescope) systems were developed for the specific purpose of observing stellar occultations by solar system objects. Stellar occultations have unique observing constraints: they may only be observable from certain parts of the globe; they often require a rapid observing cadence; and they require accurate timestamp information for each exposure. The PHOT systems consist of 14\" telescopes, CCD cameras, camera mounting plates, GPS-based time standards, and data acquisition computers. The PHOT systems are similar in principle to the POETS systems (Portabl","authors_text":"C. B. Olkin, E. F. Young, J. Regester, K. Shoemaker, L. A. Young, M. W. Buie, R. G. French","cross_cats":["astro-ph.EP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-02-14T21:58:04Z","title":"Development and Performance of the PHOT (Portable High-Speed Occultation Telescope) Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1102.2911","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":"sha256:627117a1a1075b604ca08e39b755fc573324040cc95d5fe370320c7c889507d4","target":"record","created_at":"2026-05-18T02:03:11Z","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":"ad3d96820a6dd22bed0ec4b82679b76ffab19d990c8beef31e30bb0b97f871c9","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-02-14T21:58:04Z","title_canon_sha256":"5f7732d26a487c845bb521c0c21452a2792b069c37ab006cc34d8b65645d1f89"},"schema_version":"1.0","source":{"id":"1102.2911","kind":"arxiv","version":1}},"canonical_sha256":"7e2175a735143afba2fbe475025df1ca56d0e9e74332a111338f58c9d9dfe75d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7e2175a735143afba2fbe475025df1ca56d0e9e74332a111338f58c9d9dfe75d","first_computed_at":"2026-05-18T02:03:11.159938Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:03:11.159938Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OtWV4LDeo2YdEKvVi3nTyba1KsejdJQ0FtNjNPbRvnDTCqAqi30uKAGlj63lCsqo09Xu6eurbsRyELIuR6jjBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:03:11.160464Z","signed_message":"canonical_sha256_bytes"},"source_id":"1102.2911","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:627117a1a1075b604ca08e39b755fc573324040cc95d5fe370320c7c889507d4","sha256:7b222b47989b31c7db53ba02831d28ea6588a4ad0c7550dd128f43449d389329"],"state_sha256":"ebbedfb25c0b72aa3c327628344907e506a8337ca7260683b8ef2c966b4d1ce8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TQpBcZDfuxY4YtBMYlhfDRIqDjC3dgSTqjqoWQHWIQDUCddYCXIN8edyMgIICEwkNK6jJxOi/1yvtGa21vLZBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T05:36:06.782106Z","bundle_sha256":"0b245ecaa3a5c03ffa0acafd71d86b8452fd0456998175dfef1a7aa301e69610"}}