{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:XHBSI2TMCV6FESOJ3HNL6ZVJKN","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":"517a96b9789296bd7abadad8ee8b42700a49357a720dbbd053319805d83c6684","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-02-28T04:59:05Z","title_canon_sha256":"4ea3a9514af8a7b95c36114f633ee08f54d7ce827848fbbe7bd919d0203523d1"},"schema_version":"1.0","source":{"id":"1902.10891","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.10891","created_at":"2026-05-17T23:52:26Z"},{"alias_kind":"arxiv_version","alias_value":"1902.10891v1","created_at":"2026-05-17T23:52:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.10891","created_at":"2026-05-17T23:52:26Z"},{"alias_kind":"pith_short_12","alias_value":"XHBSI2TMCV6F","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_16","alias_value":"XHBSI2TMCV6FESOJ","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_8","alias_value":"XHBSI2TM","created_at":"2026-05-18T12:33:33Z"}],"graph_snapshots":[{"event_id":"sha256:b1ee29715171de28f0b0511747d911b34043653e96f0e94edadd848e02acbdb0","target":"graph","created_at":"2026-05-17T23:52:26Z","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 Beijing-Arizona Sky Survey (BASS) is an imaging survey and uses the 2.3 m Bok telescope at Kitt Peak. In order to tap the astrometric potential of the Bok telescope and improve the astrometry of BASS, a distortion solution for the Bok telescope is made. In the past, we used a single lookup table to correct all the positional errors. However, this method can not be applied to the reduction of the observation for the Bok telescope where four CCD chips are equipped with. Then quite different from our previous method, two third-order polynomials were used to fit the lookup table. By using the ","authors_text":"H. W. Peng, N. Wang, Q. Y. Peng, X. Y. Peng, X. Zhou","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-02-28T04:59:05Z","title":"A distortion solution for the Bok telescope with four CCD chips"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.10891","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":"sha256:8f64dc6c8998dd498cc7c1e543a747ca84b1ead5920a2906c557b3ea7709628b","target":"record","created_at":"2026-05-17T23:52:26Z","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":"517a96b9789296bd7abadad8ee8b42700a49357a720dbbd053319805d83c6684","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-02-28T04:59:05Z","title_canon_sha256":"4ea3a9514af8a7b95c36114f633ee08f54d7ce827848fbbe7bd919d0203523d1"},"schema_version":"1.0","source":{"id":"1902.10891","kind":"arxiv","version":1}},"canonical_sha256":"b9c3246a6c157c5249c9d9dabf66a9535538e2a795157e5e5699c338af30db56","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b9c3246a6c157c5249c9d9dabf66a9535538e2a795157e5e5699c338af30db56","first_computed_at":"2026-05-17T23:52:26.440232Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:52:26.440232Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2qbturo+GLxKQmQ6vSbCMGzk5V2pVx0dv5QHxmQQxfV0lC2KY4gZKa/rFrJPMnhH20OT0/qvWwU0ENIPcsztBQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:52:26.440803Z","signed_message":"canonical_sha256_bytes"},"source_id":"1902.10891","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8f64dc6c8998dd498cc7c1e543a747ca84b1ead5920a2906c557b3ea7709628b","sha256:b1ee29715171de28f0b0511747d911b34043653e96f0e94edadd848e02acbdb0"],"state_sha256":"95c76caa132572e306c00378093aff7d7f9e8efb7d99ea1e5027618a286374dc"}