{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2000:L65TU5SRU4ZOSGVCZJDKSBXXSO","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":"00c2cd9fe6665d63d9019f3925355fa8d81f65a7dc17150aeac73237a086641a","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2000-02-10T12:32:17Z","title_canon_sha256":"230c155e1dd9e4fc2b9c99422ac5f9ac1aa53152c360c17a6e2dfb854961de3e"},"schema_version":"1.0","source":{"id":"astro-ph/0002224","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0002224","created_at":"2026-07-04T23:57:13Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0002224v1","created_at":"2026-07-04T23:57:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0002224","created_at":"2026-07-04T23:57:13Z"},{"alias_kind":"pith_short_12","alias_value":"L65TU5SRU4ZO","created_at":"2026-07-04T23:57:13Z"},{"alias_kind":"pith_short_16","alias_value":"L65TU5SRU4ZOSGVC","created_at":"2026-07-04T23:57:13Z"},{"alias_kind":"pith_short_8","alias_value":"L65TU5SR","created_at":"2026-07-04T23:57:13Z"}],"graph_snapshots":[{"event_id":"sha256:dd0deb10d03962f5e30563bc13a2885b84d91831018f2cc502f4b5aadd3f1004","target":"graph","created_at":"2026-07-04T23:57:13Z","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/0002224/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report the first detailed X-ray and optical observations of the medium-distant cluster A33 obtained with the Beppo-SAX satellite and with the UH 2.2m and Keck II telescopes at Mauna Kea. The information deduced from X-ray and optical imaging and spectroscopic data allowed us to identify the X-ray source 1SAXJ0027.2-1930 as the X-ray counterpart of the A33 cluster. The faint, $F_{2-10 keV} \\approx 2.4 \\times 10^{-13} \\ergscm2$, X-ray source 1SAXJ0027.2-1930, $\\sim 2$ arcmin away from the optical position of the cluster as given in the Abell catalogue, is identified with the central region of","authors_text":"A. Antonelli, A. Wolter, C.R. Mullis, F. Fiore, F. Matteucci, I.M. Gioia, J. Kaastra, P. Mazzotta, R. Fusco-Femiano, R. Mewe, S. Colafrancesco (1), T. Maccacaro, V. Antonuccio-Delogu, Y. Rephaeli","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2000-02-10T12:32:17Z","title":"An X-ray and optical study of the cluster A33"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0002224","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:bf21f1826942e11d38d866d7619f2f055641dcfa0e30930c4d43383f59cc1b33","target":"record","created_at":"2026-07-04T23:57:13Z","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":"00c2cd9fe6665d63d9019f3925355fa8d81f65a7dc17150aeac73237a086641a","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2000-02-10T12:32:17Z","title_canon_sha256":"230c155e1dd9e4fc2b9c99422ac5f9ac1aa53152c360c17a6e2dfb854961de3e"},"schema_version":"1.0","source":{"id":"astro-ph/0002224","kind":"arxiv","version":1}},"canonical_sha256":"5fbb3a7651a732e91aa2ca46a906f7938bbc3a9d8d5d250671935eea614c6cce","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5fbb3a7651a732e91aa2ca46a906f7938bbc3a9d8d5d250671935eea614c6cce","first_computed_at":"2026-07-04T23:57:13.059840Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T23:57:13.059840Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lO3ULN0c0wrgLz+RgLjt/r6TqX756gmAJstKqqfBjawRjMOsa6Ih4FjyYVenWQnqRlXBRdBWjlHKmneYMWbRCA==","signature_status":"signed_v1","signed_at":"2026-07-04T23:57:13.060329Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0002224","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bf21f1826942e11d38d866d7619f2f055641dcfa0e30930c4d43383f59cc1b33","sha256:dd0deb10d03962f5e30563bc13a2885b84d91831018f2cc502f4b5aadd3f1004"],"state_sha256":"532c75f5daa4400b02c8fd8eceb0048ed1326a6fed1d7a317fbc3f06018f3050"}