{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:ZUQ6KVUO6DX65SNMAU2JINDWWT","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":"21006feda9b69c2cc85273f89b1f9d49ed4dff61615354d56613e73ae0373c10","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-08-31T17:41:53Z","title_canon_sha256":"18a4d152b420e1687ab4b1e957051085c0ff095b5a208fc79e8af11799799af9"},"schema_version":"1.0","source":{"id":"1608.08963","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1608.08963","created_at":"2026-05-18T01:04:17Z"},{"alias_kind":"arxiv_version","alias_value":"1608.08963v1","created_at":"2026-05-18T01:04:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1608.08963","created_at":"2026-05-18T01:04:17Z"},{"alias_kind":"pith_short_12","alias_value":"ZUQ6KVUO6DX6","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_16","alias_value":"ZUQ6KVUO6DX65SNM","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_8","alias_value":"ZUQ6KVUO","created_at":"2026-05-18T12:30:55Z"}],"graph_snapshots":[{"event_id":"sha256:4766030cc0eb999451981507339cb43d3add4fd68519d6813b304f1833d7314c","target":"graph","created_at":"2026-05-18T01:04:17Z","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":"SPIDERS (The SPectroscopic IDentification of eROSITA Sources) is a program dedicated to the homogeneous and complete spectroscopic follow-up of X-ray AGN and galaxy clusters over a large area ($\\sim$7500 deg$^2$) of the extragalactic sky. SPIDERS is part of the SDSS-IV project, together with the Extended Baryon Oscillation Spectroscopic Survey (eBOSS) and the Time-Domain Spectroscopic Survey (TDSS). This paper describes the largest project within SPIDERS before the launch of eROSITA: an optical spectroscopic survey of X-ray selected, massive ($\\sim 10^{14}$ to $10^{15}~M_{\\odot}$) galaxy clust","authors_text":"Alexis Finoguenov, Andrea Merloni, Axel Schwope, Chris A. Collins, Eduardo Rozo, Eli Rykoff, Hee-Jong Seo, Jean-Paul Kneib, Jeremy Tinker, Jethro Ridl, Joel R. Brownstein, Kirpal Nandra, Kyle Dawson, Mara Salvato, Matthias Steinmetz, Nicolas Clerc, Tatyana Sadibekova, Tom Dwelly, Yen-Ting Lin, Yu-Ying Zhang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-08-31T17:41:53Z","title":"SPIDERS: the spectroscopic follow-up of X-ray selected clusters of galaxies in SDSS-IV"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.08963","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":"sha256:54e2938f33f9f3bf6681b83e49b2c8acde76334d5a911bfc2317f2dc0d3d3b59","target":"record","created_at":"2026-05-18T01:04:17Z","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":"21006feda9b69c2cc85273f89b1f9d49ed4dff61615354d56613e73ae0373c10","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-08-31T17:41:53Z","title_canon_sha256":"18a4d152b420e1687ab4b1e957051085c0ff095b5a208fc79e8af11799799af9"},"schema_version":"1.0","source":{"id":"1608.08963","kind":"arxiv","version":1}},"canonical_sha256":"cd21e5568ef0efeec9ac0534943476b4ce3ed4006718aaba6681299e9151d6d8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cd21e5568ef0efeec9ac0534943476b4ce3ed4006718aaba6681299e9151d6d8","first_computed_at":"2026-05-18T01:04:17.544193Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:04:17.544193Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"FnxyTcX98BCfTOC65buxAVGADj/kDpNoc4YIrRXvmGYu0uc+Z9BBtt2x/X9/5n3Mwnht/2IuqjUJWylBsrNzDg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:04:17.544706Z","signed_message":"canonical_sha256_bytes"},"source_id":"1608.08963","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:54e2938f33f9f3bf6681b83e49b2c8acde76334d5a911bfc2317f2dc0d3d3b59","sha256:4766030cc0eb999451981507339cb43d3add4fd68519d6813b304f1833d7314c"],"state_sha256":"902bf2865d3db6e5da47990d297c85944eafee1e98e03c0c32bbf7f14683ed8b"}