{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:3AE33OBJZJKG4TJGCWGQGEMFHT","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":"e88858f0123e0735c6626a64ed0a7075c94f0391e14eb91310db26c658f28555","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-06-05T17:53:58Z","title_canon_sha256":"7e33057549c8553fb00fed8576ebfbba9ebf6253acb5c2957781a222f289da1c"},"schema_version":"1.0","source":{"id":"2606.07730","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.07730","created_at":"2026-06-09T01:04:50Z"},{"alias_kind":"arxiv_version","alias_value":"2606.07730v1","created_at":"2026-06-09T01:04:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.07730","created_at":"2026-06-09T01:04:50Z"},{"alias_kind":"pith_short_12","alias_value":"3AE33OBJZJKG","created_at":"2026-06-09T01:04:50Z"},{"alias_kind":"pith_short_16","alias_value":"3AE33OBJZJKG4TJG","created_at":"2026-06-09T01:04:50Z"},{"alias_kind":"pith_short_8","alias_value":"3AE33OBJ","created_at":"2026-06-09T01:04:50Z"}],"graph_snapshots":[{"event_id":"sha256:0b0803e627bf21276fecfd18982b8aec14d0e9c0f23f92a2a7ce4145bc395352","target":"graph","created_at":"2026-06-09T01:04:50Z","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/2606.07730/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present a new, highly homogeneous quasar sample with X-ray and UV observations optimized to reliably estimate distances via the non-linear X-ray-to-UV relation. Cross-matching the Sloan Digital Sky Survey DR16 quasar catalog with the XMM-Newton serendipitous catalogue (4XMM--DR14), we employ strict selection criteria to build a robust sample: (1) UV and (2) X-ray colour constraints to avoid, respectively, extinction and absorption; (3) removal of broad absorption line and radio-bright quasars; (4) exclusion of sources at z<0.7 to prevent galactic UV contamination; and (5) rejection of sourc","authors_text":"A. Sacchi, A. Shlentsova, B. Trefoloni, C. Niccolai, E. Lusso, E. Nardini, G. Risaliti, M. Ralowski, M. Signorini","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-06-05T17:53:58Z","title":"The X-ray-to-UV relation does not evolve in homogeneous quasar samples"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.07730","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:d239e0c75f445a73e25ab091ae3118a8d316123b946ef023591c37d73216ea85","target":"record","created_at":"2026-06-09T01:04:50Z","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":"e88858f0123e0735c6626a64ed0a7075c94f0391e14eb91310db26c658f28555","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-06-05T17:53:58Z","title_canon_sha256":"7e33057549c8553fb00fed8576ebfbba9ebf6253acb5c2957781a222f289da1c"},"schema_version":"1.0","source":{"id":"2606.07730","kind":"arxiv","version":1}},"canonical_sha256":"d809bdb829ca546e4d26158d0311853cf2b6bde56e2eaf62fea1ff110e071d96","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d809bdb829ca546e4d26158d0311853cf2b6bde56e2eaf62fea1ff110e071d96","first_computed_at":"2026-06-09T01:04:50.581905Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-09T01:04:50.581905Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rOlXLpn2NyR/qPOFyMU0T0Xyi9Lm7HmeOfz4bBBQuv4OBpkkxr8ZU8GHrRuKTu388+9ft/TlB0bvXYcyIOxNDw==","signature_status":"signed_v1","signed_at":"2026-06-09T01:04:50.582422Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.07730","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d239e0c75f445a73e25ab091ae3118a8d316123b946ef023591c37d73216ea85","sha256:0b0803e627bf21276fecfd18982b8aec14d0e9c0f23f92a2a7ce4145bc395352"],"state_sha256":"596a1a42ce584dc894ece09e6ce14b11e008c12eb5fc2f5088e541021c46f2fc"}