{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:XHBSI2TMCV6FESOJ3HNL6ZVJKN","short_pith_number":"pith:XHBSI2TM","canonical_record":{"source":{"id":"1902.10891","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-02-28T04:59:05Z","cross_cats_sorted":[],"title_canon_sha256":"4ea3a9514af8a7b95c36114f633ee08f54d7ce827848fbbe7bd919d0203523d1","abstract_canon_sha256":"517a96b9789296bd7abadad8ee8b42700a49357a720dbbd053319805d83c6684"},"schema_version":"1.0"},"canonical_sha256":"b9c3246a6c157c5249c9d9dabf66a9535538e2a795157e5e5699c338af30db56","source":{"kind":"arxiv","id":"1902.10891","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"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:XHBSI2TMCV6FESOJ3HNL6ZVJKN","target":"record","payload":{"canonical_record":{"source":{"id":"1902.10891","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-02-28T04:59:05Z","cross_cats_sorted":[],"title_canon_sha256":"4ea3a9514af8a7b95c36114f633ee08f54d7ce827848fbbe7bd919d0203523d1","abstract_canon_sha256":"517a96b9789296bd7abadad8ee8b42700a49357a720dbbd053319805d83c6684"},"schema_version":"1.0"},"canonical_sha256":"b9c3246a6c157c5249c9d9dabf66a9535538e2a795157e5e5699c338af30db56","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:52:26.440803Z","signature_b64":"2qbturo+GLxKQmQ6vSbCMGzk5V2pVx0dv5QHxmQQxfV0lC2KY4gZKa/rFrJPMnhH20OT0/qvWwU0ENIPcsztBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b9c3246a6c157c5249c9d9dabf66a9535538e2a795157e5e5699c338af30db56","last_reissued_at":"2026-05-17T23:52:26.440232Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:52:26.440232Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1902.10891","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":"2026-05-17T23:52:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mU/w3IJGScsuHdytiOih8zJWeCkNmR1hPtfRC4VtxQCw92ACOa0A6LcTwGfXTHa4r0JsqisacJ0ADMQFjWunBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T06:59:15.304849Z"},"content_sha256":"8f64dc6c8998dd498cc7c1e543a747ca84b1ead5920a2906c557b3ea7709628b","schema_version":"1.0","event_id":"sha256:8f64dc6c8998dd498cc7c1e543a747ca84b1ead5920a2906c557b3ea7709628b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:XHBSI2TMCV6FESOJ3HNL6ZVJKN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A distortion solution for the Bok telescope with four CCD chips","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"H. W. Peng, N. Wang, Q. Y. Peng, X. Y. Peng, X. Zhou","submitted_at":"2019-02-28T04:59:05Z","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 "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.10891","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":"2026-05-17T23:52:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uX95fVSthq2hCwFa7c99HNeteXlA8pZPV4/zsJR4pyJsM46Nq0QvvXBdfgJ+DzciIT9yBTOMoGnmFTrRkZX/Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T06:59:15.305336Z"},"content_sha256":"b1ee29715171de28f0b0511747d911b34043653e96f0e94edadd848e02acbdb0","schema_version":"1.0","event_id":"sha256:b1ee29715171de28f0b0511747d911b34043653e96f0e94edadd848e02acbdb0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XHBSI2TMCV6FESOJ3HNL6ZVJKN/bundle.json","state_url":"https://pith.science/pith/XHBSI2TMCV6FESOJ3HNL6ZVJKN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XHBSI2TMCV6FESOJ3HNL6ZVJKN/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":"2026-05-31T06:59:15Z","links":{"resolver":"https://pith.science/pith/XHBSI2TMCV6FESOJ3HNL6ZVJKN","bundle":"https://pith.science/pith/XHBSI2TMCV6FESOJ3HNL6ZVJKN/bundle.json","state":"https://pith.science/pith/XHBSI2TMCV6FESOJ3HNL6ZVJKN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XHBSI2TMCV6FESOJ3HNL6ZVJKN/bundle.json"},"state":{"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"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"N2vwRP0wyEi9moKB8/SLl4+1E8OMUomPxmKuAOynkhue4GISlxikh+MbcoBLm7cshQQ5+mOaY6BU0g6cOUv1CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T06:59:15.309415Z","bundle_sha256":"43327ab62ecb439fe0a2ed961089ae921b5074319326088d74cea04903831ec5"}}