{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:5AE4YP2WDD2NROL5X3J564BOE2","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":"b06354326bf135fc32469da97c67cdf9833ebcf0c3066ce034ef0cde23b25e36","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-03-01T16:51:47Z","title_canon_sha256":"9babbdfa4f7e346de28c936f11c395f9952544c4a300b936563e4873947d8317"},"schema_version":"1.0","source":{"id":"1103.0213","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1103.0213","created_at":"2026-05-18T02:03:01Z"},{"alias_kind":"arxiv_version","alias_value":"1103.0213v1","created_at":"2026-05-18T02:03:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1103.0213","created_at":"2026-05-18T02:03:01Z"},{"alias_kind":"pith_short_12","alias_value":"5AE4YP2WDD2N","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_16","alias_value":"5AE4YP2WDD2NROL5","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_8","alias_value":"5AE4YP2W","created_at":"2026-05-18T12:26:20Z"}],"graph_snapshots":[{"event_id":"sha256:74938bf879e3e41e2767b42dc44fea0da8b3ecbc6654e482aee86f15790db861","target":"graph","created_at":"2026-05-18T02:03:01Z","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 new observations of two Galactic globular clusters, PAL4 and PAL14, using the Wide-Field Channel of the Advanced Camera for Surveys (ACS) on board the Hubble Space Telescope (HST), and reanalyze archival data from a third, NGC2419. We matched our photometry of hundreds of stars in these fields from the ACS images to existing, ground-based photometry of faint sequences which were calibrated on the standard BVRI system of Landolt. These stars are significantly fainter than those generally used for HST calibration purposes, and therefore are much better matched to supporting precision ","authors_text":"Abhijit Saha, Andrew E. Dolphin, Jennifer A. Claver, Richard A. Shaw","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-03-01T16:51:47Z","title":"Calibration of BVRI Photometry for the Wide Field Channel of the HST Advanced Camera for Surveys"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1103.0213","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":"sha256:72201a1de9fff90d558979b5e9a584070343936052c8816e441d17d1095d38a1","target":"record","created_at":"2026-05-18T02:03:01Z","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":"b06354326bf135fc32469da97c67cdf9833ebcf0c3066ce034ef0cde23b25e36","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-03-01T16:51:47Z","title_canon_sha256":"9babbdfa4f7e346de28c936f11c395f9952544c4a300b936563e4873947d8317"},"schema_version":"1.0","source":{"id":"1103.0213","kind":"arxiv","version":1}},"canonical_sha256":"e809cc3f5618f4d8b97dbed3df702e2696a9cde5bff6e865c001d82b0905971a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e809cc3f5618f4d8b97dbed3df702e2696a9cde5bff6e865c001d82b0905971a","first_computed_at":"2026-05-18T02:03:01.629003Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:03:01.629003Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xVlngwuTwRe9wIyhDmmtO2PO9u2/LfL/csorPZ+R6XhxnZof6unrio/ft6PT/eAuipaOaQlXoMEmjLusVIqvDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:03:01.629612Z","signed_message":"canonical_sha256_bytes"},"source_id":"1103.0213","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:72201a1de9fff90d558979b5e9a584070343936052c8816e441d17d1095d38a1","sha256:74938bf879e3e41e2767b42dc44fea0da8b3ecbc6654e482aee86f15790db861"],"state_sha256":"a93f7e86af48fec9e67c31d5ce1ea8d8151eb2fff1a503867dcab0b148c21650"}