{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:SHF7O26HMOKJQPOUYHRIQIGV5V","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":"b18535b71fdd699c385efeb3ef972063825160ce3f31e9b62366d840a06f2b9d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-08-17T11:46:04Z","title_canon_sha256":"d8cd3f49b6b09aced886f17ee2510b0fcd6fc880e0d9ed6d7a3671e4dbea24f2"},"schema_version":"1.0","source":{"id":"1108.3455","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1108.3455","created_at":"2026-05-18T02:00:52Z"},{"alias_kind":"arxiv_version","alias_value":"1108.3455v1","created_at":"2026-05-18T02:00:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1108.3455","created_at":"2026-05-18T02:00:52Z"},{"alias_kind":"pith_short_12","alias_value":"SHF7O26HMOKJ","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_16","alias_value":"SHF7O26HMOKJQPOU","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_8","alias_value":"SHF7O26H","created_at":"2026-05-18T12:26:41Z"}],"graph_snapshots":[{"event_id":"sha256:64555f48b22617f684549c72875648aa0b3ece84fd9382206ba2a87fd94dfc1f","target":"graph","created_at":"2026-05-18T02:00:52Z","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":"We present the basic concept of a new astronomical instrument: SPARC4 - Simultaneous Polarimeter and Rapid Camera in 4 bands. SPARC4 combines in one instrument: (i) photometric and polarimetric modes; (ii) sub-second time-resolution in photometric mode and excellent time-resolution in polarimetric mode; (iii) simultaneous imaging in four broad-bands for both modes. This combination will make SPARC4 a unique facility for ground-based optical observatories. Presently, the project is in its conceptual design phase.","authors_text":"A. Carciofi, A. Kanaan, A. Milone, A. M. Magalhaes, A. Pereyra, C. Strauss, C. V. Rodrigues, D. Cieslinski, F. J. Jablonski, G. Franco, J. E. R. Costa, K. M. G. Silva, K. Taylor, M. Assafin, R. Laporte, T. Dominici","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-08-17T11:46:04Z","title":"SPARC4: A Simultaneous Polarimeter and Rapid Camera in 4 Bands"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1108.3455","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:adfa07ff9ed7359003ca43b4468d8354ba41efe7fbd57c8c7aa46b92e38d1eee","target":"record","created_at":"2026-05-18T02:00:52Z","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":"b18535b71fdd699c385efeb3ef972063825160ce3f31e9b62366d840a06f2b9d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-08-17T11:46:04Z","title_canon_sha256":"d8cd3f49b6b09aced886f17ee2510b0fcd6fc880e0d9ed6d7a3671e4dbea24f2"},"schema_version":"1.0","source":{"id":"1108.3455","kind":"arxiv","version":1}},"canonical_sha256":"91cbf76bc76394983dd4c1e28820d5ed653592074972a5c132c065e245f9a2d1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"91cbf76bc76394983dd4c1e28820d5ed653592074972a5c132c065e245f9a2d1","first_computed_at":"2026-05-18T02:00:52.916676Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:00:52.916676Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BlD/w27iA+DFObQpVFehhxwI7ZziZAAWFTFoYupPNNh24W8kna9gU15Xjza4jN/IwJErhgfjWA7azSjD6gJZCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:00:52.917328Z","signed_message":"canonical_sha256_bytes"},"source_id":"1108.3455","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:adfa07ff9ed7359003ca43b4468d8354ba41efe7fbd57c8c7aa46b92e38d1eee","sha256:64555f48b22617f684549c72875648aa0b3ece84fd9382206ba2a87fd94dfc1f"],"state_sha256":"ff20b744c24a2e58f50b3eb29fc8b90032857c138d686b819ab4463af42d93bf"}