{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:3XF5ZYWYE2BVAROWASMUTLWZZ3","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":"f9affd4bf4ca152d2731dacaa16f50ccc1a22fb0e392295a2786c2d13ff9e578","cross_cats_sorted":["cs.OH"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-07-10T09:18:58Z","title_canon_sha256":"094a60f5856fac8882c6e5f856e14db16aa66ee2131324e80f0ecf52f6f9a8f4"},"schema_version":"1.0","source":{"id":"1607.04193","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.04193","created_at":"2026-05-18T01:11:03Z"},{"alias_kind":"arxiv_version","alias_value":"1607.04193v1","created_at":"2026-05-18T01:11:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.04193","created_at":"2026-05-18T01:11:03Z"},{"alias_kind":"pith_short_12","alias_value":"3XF5ZYWYE2BV","created_at":"2026-05-18T12:29:58Z"},{"alias_kind":"pith_short_16","alias_value":"3XF5ZYWYE2BVAROW","created_at":"2026-05-18T12:29:58Z"},{"alias_kind":"pith_short_8","alias_value":"3XF5ZYWY","created_at":"2026-05-18T12:29:58Z"}],"graph_snapshots":[{"event_id":"sha256:c6ae0dd4b63f0b8680e3d603558d3178782479195ebcbca39a074db447410770","target":"graph","created_at":"2026-05-18T01:11:03Z","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 develop a galaxy cluster finding algorithm based on spectral clustering technique to identify optical counterparts and estimate optical redshifts for X-ray selected cluster candidates. As an application, we run our algorithm on a sample of X-ray cluster candidates selected from the third XMM-Newton serendipitous source catalog (3XMM-DR5) that are located in the Stripe 82 of the Sloan Digital Sky Survey (SDSS). Our method works on galaxies described in the color-magnitude feature space. We begin by examining 45 galaxy clusters with published spectroscopic redshifts in the range of 0.1 to 0.8","authors_text":"Ali Takey, Amin Shoukry, Eman Mahmoud","cross_cats":["cs.OH"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-07-10T09:18:58Z","title":"Spectral Clustering for Optical Confirmation and Redshift Estimation of X-ray Selected Galaxy Cluster Candidates in the SDSS Stripe 82"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.04193","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":"sha256:5b2772e42971139fb777c628a7ab3d67772e055871d009068c7e6b84a18db18c","target":"record","created_at":"2026-05-18T01:11:03Z","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":"f9affd4bf4ca152d2731dacaa16f50ccc1a22fb0e392295a2786c2d13ff9e578","cross_cats_sorted":["cs.OH"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-07-10T09:18:58Z","title_canon_sha256":"094a60f5856fac8882c6e5f856e14db16aa66ee2131324e80f0ecf52f6f9a8f4"},"schema_version":"1.0","source":{"id":"1607.04193","kind":"arxiv","version":1}},"canonical_sha256":"ddcbdce2d826835045d6049949aed9cee4bf7e632852c677f6b218d39b9c12b5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ddcbdce2d826835045d6049949aed9cee4bf7e632852c677f6b218d39b9c12b5","first_computed_at":"2026-05-18T01:11:03.932855Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:11:03.932855Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AWLHDTFxehUPkP1X9ti7/KZLAGKMtNwvdzPqwefZYbCuKGH/SFuacVz1QwFRH8ah9rEo/DGr8NEaneJTfV5MCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:11:03.933622Z","signed_message":"canonical_sha256_bytes"},"source_id":"1607.04193","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5b2772e42971139fb777c628a7ab3d67772e055871d009068c7e6b84a18db18c","sha256:c6ae0dd4b63f0b8680e3d603558d3178782479195ebcbca39a074db447410770"],"state_sha256":"5a52b5f795140180c418b19663fbca3fafff315410b1ad8f9a9244fcf45279f6"}