{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:DN6VNU7OGZ7FO5HCARQDYCTMIK","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":"043c2b73cfa07e2e6de1f64b47b5ebaba8da1e36c7dfd5af53dc80c0527adec3","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2009-12-11T21:10:34Z","title_canon_sha256":"31114c32a9573c3257467aed4e5bc34d05b0c45b50707a2f7ae397e4bade2c32"},"schema_version":"1.0","source":{"id":"0912.2355","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0912.2355","created_at":"2026-05-18T02:33:56Z"},{"alias_kind":"arxiv_version","alias_value":"0912.2355v1","created_at":"2026-05-18T02:33:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0912.2355","created_at":"2026-05-18T02:33:56Z"},{"alias_kind":"pith_short_12","alias_value":"DN6VNU7OGZ7F","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_16","alias_value":"DN6VNU7OGZ7FO5HC","created_at":"2026-05-18T12:25:59Z"},{"alias_kind":"pith_short_8","alias_value":"DN6VNU7O","created_at":"2026-05-18T12:25:59Z"}],"graph_snapshots":[{"event_id":"sha256:075e1a7b53ac5a85467fff9af9a2bf3863cf0a35b6a9cda42cbc165721890764","target":"graph","created_at":"2026-05-18T02:33:56Z","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 describe technical aspects of an astrometric and photometric survey of the North Celestial Cap (NCC), from the Pole (DEC=90 deg) to DEC=80 deg, in support of the TAUVEX mission. This region, at galactic latitudes from ~ 17 deg to ~ 37 deg, has poor coverage in modern CCD-based surveys. The observations are performed with the Wise Observatory one-meter reflector and with a new mosaic CCD camera (LAIWO) that images in the Johnson-Cousins R and I bands a one-square-degree field with subarcsec pixels. The images are treated using IRAF and SExtractor to produce a final catalogue of sources. The ","authors_text":"Cristina Afonso, Evgeny Gorbikov, Noah Brosch","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2009-12-11T21:10:34Z","title":"A Two-Colour CCD Survey of the North Celestial Cap: I. The Method"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0912.2355","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":"sha256:065591458b58ef945eedd7473eaa71f1b9651815ba0c1f4124bf53d37d4e7263","target":"record","created_at":"2026-05-18T02:33:56Z","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":"043c2b73cfa07e2e6de1f64b47b5ebaba8da1e36c7dfd5af53dc80c0527adec3","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2009-12-11T21:10:34Z","title_canon_sha256":"31114c32a9573c3257467aed4e5bc34d05b0c45b50707a2f7ae397e4bade2c32"},"schema_version":"1.0","source":{"id":"0912.2355","kind":"arxiv","version":1}},"canonical_sha256":"1b7d56d3ee367e5774e204603c0a6c42a2797800aafdaac9ba39e6c87f81648c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1b7d56d3ee367e5774e204603c0a6c42a2797800aafdaac9ba39e6c87f81648c","first_computed_at":"2026-05-18T02:33:56.758752Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:33:56.758752Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RsiYZeWplBzK3J6vSTwUkNn2gqd0Or0YJSGmie0CSmpCmAqAxHtiossgUeDKj72QLFwBRyCDmRQ/LUzE2maeDg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:33:56.759182Z","signed_message":"canonical_sha256_bytes"},"source_id":"0912.2355","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:065591458b58ef945eedd7473eaa71f1b9651815ba0c1f4124bf53d37d4e7263","sha256:075e1a7b53ac5a85467fff9af9a2bf3863cf0a35b6a9cda42cbc165721890764"],"state_sha256":"459ec0dd91df8d72d64cede620559be34da008e211c502c62a172f5335f96c4d"}