{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:GRYVMN3XRHDAPNKJLSASOCZZSV","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":"1ae678b015ff5a88391bbbe455fc3998acc69d49771ceee63c314a8dabd2fb20","cross_cats_sorted":["astro-ph.IM","physics.pop-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-01-12T10:28:59Z","title_canon_sha256":"6345e823eb62815809036bac166c76927ce9334be08bda70689f2d1983918cba"},"schema_version":"1.0","source":{"id":"1801.04124","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.04124","created_at":"2026-05-18T00:08:31Z"},{"alias_kind":"arxiv_version","alias_value":"1801.04124v2","created_at":"2026-05-18T00:08:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.04124","created_at":"2026-05-18T00:08:31Z"},{"alias_kind":"pith_short_12","alias_value":"GRYVMN3XRHDA","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_16","alias_value":"GRYVMN3XRHDAPNKJ","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_8","alias_value":"GRYVMN3X","created_at":"2026-05-18T12:32:25Z"}],"graph_snapshots":[{"event_id":"sha256:c7bce62839405f18681b1a667d9f621c60147931b4952bc6fdb0df8cdcba05e4","target":"graph","created_at":"2026-05-18T00:08:31Z","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 report on the search for optical counterparts of Planck Sunyaev-Zel'dovich (SZ) cluster candidates using a 0.6 meter non-professional telescope. Among the observed sources, an unconfirmed candidate, PSZ2 G156.24+22.32, is found to be associated with a region of more than 100 galaxies within a 3 arcminutes radius around the Sunyaev-Zel'dovich maximum signal coordinates. Using 14 hours of cumulated exposure over the Sloan color filters g', r', i', and, z', we estimate the photometric redshift of these galaxies at zphot=0.29 +- 0.08. Using the red-sequence galaxy method gives a photometric red","authors_text":"Christophe Ringeval, Simon de Visscher, Vincent Boucher","cross_cats":["astro-ph.IM","physics.pop-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-01-12T10:28:59Z","title":"Optical Follow-up of Planck Cluster Candidates with Small Instruments"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.04124","kind":"arxiv","version":2},"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":"sha256:2b5ebc695c31404b3a3a5a857ff734e83d22dd6d80017eeb0788a92b95be3da1","target":"record","created_at":"2026-05-18T00:08:31Z","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":"1ae678b015ff5a88391bbbe455fc3998acc69d49771ceee63c314a8dabd2fb20","cross_cats_sorted":["astro-ph.IM","physics.pop-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-01-12T10:28:59Z","title_canon_sha256":"6345e823eb62815809036bac166c76927ce9334be08bda70689f2d1983918cba"},"schema_version":"1.0","source":{"id":"1801.04124","kind":"arxiv","version":2}},"canonical_sha256":"347156377789c607b5495c81270b39955783763406c6a8271213805964a436f2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"347156377789c607b5495c81270b39955783763406c6a8271213805964a436f2","first_computed_at":"2026-05-18T00:08:31.227758Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:08:31.227758Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RsEJB/q7o8rcqFaz2jZ6UbOaMXXVLvzatAJR+4bM686jq7OLHivS3uuNcTQC84wQvZtk36hRsfzpEOTj+SlQDw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:08:31.228177Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.04124","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2b5ebc695c31404b3a3a5a857ff734e83d22dd6d80017eeb0788a92b95be3da1","sha256:c7bce62839405f18681b1a667d9f621c60147931b4952bc6fdb0df8cdcba05e4"],"state_sha256":"2c00bf86c121783a4b0bbf2b172b4ee5dd2a67d085d1d7b1162d4635f27fc099"}