{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2006:NVH6O2C2ADDXYCJURJ4RQDBCBD","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":"e69f9d9a53a22bd52b8ceb09276889488f948d06f7432398c6b66063bf8813de","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-03-20T08:59:25Z","title_canon_sha256":"50c3b17628e24eaa1547549b834e451be78cae37b59db0dd7abf91def47dc0df"},"schema_version":"1.0","source":{"id":"astro-ph/0603521","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0603521","created_at":"2026-07-04T16:58:27Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0603521v1","created_at":"2026-07-04T16:58:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0603521","created_at":"2026-07-04T16:58:27Z"},{"alias_kind":"pith_short_12","alias_value":"NVH6O2C2ADDX","created_at":"2026-07-04T16:58:27Z"},{"alias_kind":"pith_short_16","alias_value":"NVH6O2C2ADDXYCJU","created_at":"2026-07-04T16:58:27Z"},{"alias_kind":"pith_short_8","alias_value":"NVH6O2C2","created_at":"2026-07-04T16:58:27Z"}],"graph_snapshots":[{"event_id":"sha256:2c5476e36df173d6de4c53474c2d8b34e6ee705093c1f11a06691fd5b7622bab","target":"graph","created_at":"2026-07-04T16:58:27Z","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/0603521/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present a survey of serendipitous extended X-ray sources and optical cluster candidates from the Chandra Multi-wavelength Project (ChaMP). Our main goal is to make an unbiased comparison of X-ray and optical cluster detection methods. In 130 archival Chandra pointings covering 13 square degrees, we use a wavelet decomposition technique to detect 55 extended sources, of which 6 are nearby single galaxies. Our X-ray cluster catalog reaches a typical flux limit of about ~10^-14 erg s^-1 cm^-2, with a median cluster core radius of 21 arcsec. For 56 of the 130 X-ray fields, we use the ChaMP's de","authors_text":"A. Mossman, A. Vikhlinin, B. J. Wilkes, B. T. Jannuzi, D. Perley, D.-W. Kim, H. Tananbaum, J. Silverman, M. G. Smith, M. Kim, P. J. Green, R. Burenin, R. Cameron, R. C. Smith, W. A. Barkhouse","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2006-03-20T08:59:25Z","title":"ChaMP Serendipitous Galaxy Cluster Survey"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0603521","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":"sha256:060dc4b95cb5d2fef8d68d6bffcb9acdc96737998ebb89e6848e3a127c21a9af","target":"record","created_at":"2026-07-04T16:58:27Z","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":"e69f9d9a53a22bd52b8ceb09276889488f948d06f7432398c6b66063bf8813de","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2006-03-20T08:59:25Z","title_canon_sha256":"50c3b17628e24eaa1547549b834e451be78cae37b59db0dd7abf91def47dc0df"},"schema_version":"1.0","source":{"id":"astro-ph/0603521","kind":"arxiv","version":1}},"canonical_sha256":"6d4fe7685a00c77c09348a79180c2208f6b765189c28804512d61674c4f2520a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6d4fe7685a00c77c09348a79180c2208f6b765189c28804512d61674c4f2520a","first_computed_at":"2026-07-04T16:58:27.922099Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:58:27.922099Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"knzx1StdChrPOZjB4Rv5iXPG4wJbvlbI6cjerrC2vx41S8B1a4riQfnP14n9Co4dAGmiWrt1bh1de/8dZZmdAQ==","signature_status":"signed_v1","signed_at":"2026-07-04T16:58:27.922478Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0603521","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:060dc4b95cb5d2fef8d68d6bffcb9acdc96737998ebb89e6848e3a127c21a9af","sha256:2c5476e36df173d6de4c53474c2d8b34e6ee705093c1f11a06691fd5b7622bab"],"state_sha256":"ae9beb8e011a23ee80172d02f44530c445716e5b14e8287ffbf7fcefedb94bbd"}