{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2002:T3H2PP6OOFM2XUH7P6WVODMXKV","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":"d88918b5fc96d76c2ea9d2b02ea5049799191bb5aa74e21c3faadefe134fcf8a","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2002-01-10T00:25:07Z","title_canon_sha256":"8223b6c1a5e55cc6e1ab3ad927257b0474218720c5b5bbf1764d18da06e6969f"},"schema_version":"1.0","source":{"id":"astro-ph/0201143","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0201143","created_at":"2026-07-04T15:20:39Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0201143v2","created_at":"2026-07-04T15:20:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0201143","created_at":"2026-07-04T15:20:39Z"},{"alias_kind":"pith_short_12","alias_value":"T3H2PP6OOFM2","created_at":"2026-07-04T15:20:39Z"},{"alias_kind":"pith_short_16","alias_value":"T3H2PP6OOFM2XUH7","created_at":"2026-07-04T15:20:39Z"},{"alias_kind":"pith_short_8","alias_value":"T3H2PP6O","created_at":"2026-07-04T15:20:39Z"}],"graph_snapshots":[{"event_id":"sha256:1cb8f81ee62b9b47c5cb50a9d314ccd66bfe2762b711081b5c69ffa5d41bbe5b","target":"graph","created_at":"2026-07-04T15:20:39Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/astro-ph/0201143/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present the 158 standard stars that define the u'g'r'i'z' photometric system. These stars form the basis for the photometric calibration of the Sloan Digital Sky Survey (SDSS). The defining instrument system and filters, the observing process, the reduction techniques, and the software used to create the stellar network are all described. We briefly discuss the history of the star selection process, the derivation of a set of transformation equations for the UBVRcIc system, and plans for future work.","authors_text":"A. Henden, A. M. Jorgensen, A. Tolea, A. Uomoto, B. Chen, D. G. York, D. L. Tucker, J. Annis, J. A. Smith, J. Brinkmann, J. E. Gunn, J. Holtzman, J. R. Pier, K. Shimasaku, M. Fukugita, M. Hamabe, M. Watanabe, M. W. Richmond, S.-I. Ichikawa, S. Kent, T. A. McKay, T. Ichikawa","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2002-01-10T00:25:07Z","title":"The u'g'r'i'z' Standard Star Network"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0201143","kind":"arxiv","version":2},"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:b7018cb62906208d6426eb9d176c7f90e809c10d5826067952442415e75ebf4d","target":"record","created_at":"2026-07-04T15:20:39Z","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":"d88918b5fc96d76c2ea9d2b02ea5049799191bb5aa74e21c3faadefe134fcf8a","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2002-01-10T00:25:07Z","title_canon_sha256":"8223b6c1a5e55cc6e1ab3ad927257b0474218720c5b5bbf1764d18da06e6969f"},"schema_version":"1.0","source":{"id":"astro-ph/0201143","kind":"arxiv","version":2}},"canonical_sha256":"9ecfa7bfce7159abd0ff7fad570d97557395bc83eefb6410767a496630f8c27e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9ecfa7bfce7159abd0ff7fad570d97557395bc83eefb6410767a496630f8c27e","first_computed_at":"2026-07-04T15:20:39.883220Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:20:39.883220Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Sp6vCG4mvEOlIeaDLOdUFMTBSBUJ1wTx0gDoTJvfeU4uww8XWpxrcgEE2MZzZyqwkW3nkFqmFHYZFsy1j18iBA==","signature_status":"signed_v1","signed_at":"2026-07-04T15:20:39.883668Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0201143","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b7018cb62906208d6426eb9d176c7f90e809c10d5826067952442415e75ebf4d","sha256:1cb8f81ee62b9b47c5cb50a9d314ccd66bfe2762b711081b5c69ffa5d41bbe5b"],"state_sha256":"405992eba6d636e3b58594878c3c9625f77e78eacba714c76d4885a1bc05c9da"}