{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2002:ZLN5RTILSPFD5GWO52ST4AVQSA","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":"b04faff67c226ccffead5edcf61215cc08d05b5cec6b50e40d3349286e709051","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2002-01-10T23:56:22Z","title_canon_sha256":"b8871ae3e18a2bf8b1e43b955fd6007f05326ec760cd3740b0608c619ca2de0e"},"schema_version":"1.0","source":{"id":"astro-ph/0201166","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0201166","created_at":"2026-07-04T14:11:45Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0201166v1","created_at":"2026-07-04T14:11:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0201166","created_at":"2026-07-04T14:11:45Z"},{"alias_kind":"pith_short_12","alias_value":"ZLN5RTILSPFD","created_at":"2026-07-04T14:11:45Z"},{"alias_kind":"pith_short_16","alias_value":"ZLN5RTILSPFD5GWO","created_at":"2026-07-04T14:11:45Z"},{"alias_kind":"pith_short_8","alias_value":"ZLN5RTIL","created_at":"2026-07-04T14:11:45Z"}],"graph_snapshots":[{"event_id":"sha256:94813425d2781d16dff7b92ce4dad16ecaf7d3b491885660d275da4672569050","target":"graph","created_at":"2026-07-04T14:11:45Z","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/0201166/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The dense central region of NGC 6397 contains three classes of stars whose origins are likely related to stellar interactions: blue stragglers, cataclysmic variables, and probable helium white dwarfs. We summarize results concerning CVs and HeWD candidates that have been identified in two imaging studies with Hubble Space Telescope, including one CV candidate that appears well outside the cluster core. We also present results concerning binaries containing two main sequence stars in the central parts of the cluster. Proper motion information derived from two epochs of HST data is used to remov","authors_text":"Adam S. Bolton (San Francisco State University), Adrienne M. Cool","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2002-01-10T23:56:22Z","title":"Blue Stars and Binary Stars in NGC 6397: Case Study of a Collapsed-Core Globular Cluster"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0201166","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:ccfb872ca2443fb59f3558fb116db06d6d3f0c2e3b980f5cedae88ef347100f3","target":"record","created_at":"2026-07-04T14:11:45Z","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":"b04faff67c226ccffead5edcf61215cc08d05b5cec6b50e40d3349286e709051","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2002-01-10T23:56:22Z","title_canon_sha256":"b8871ae3e18a2bf8b1e43b955fd6007f05326ec760cd3740b0608c619ca2de0e"},"schema_version":"1.0","source":{"id":"astro-ph/0201166","kind":"arxiv","version":1}},"canonical_sha256":"cadbd8cd0b93ca3e9aceeea53e02b0900062fc9488e4cb6e001ee3c09020a253","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cadbd8cd0b93ca3e9aceeea53e02b0900062fc9488e4cb6e001ee3c09020a253","first_computed_at":"2026-07-04T14:11:45.413871Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T14:11:45.413871Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"blg3sOjnBXBd10amNv8AvNmz03poIIYT0kQhELX3Q96QsVT+jPnKo7ZEDmxL7x1IG8eT1xGOpnVmTPyI699WCQ==","signature_status":"signed_v1","signed_at":"2026-07-04T14:11:45.414293Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0201166","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ccfb872ca2443fb59f3558fb116db06d6d3f0c2e3b980f5cedae88ef347100f3","sha256:94813425d2781d16dff7b92ce4dad16ecaf7d3b491885660d275da4672569050"],"state_sha256":"51297691729081b4b93c9fdc81453c7cc86e79ff713b315660906b964ac171bc"}