{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:PPRK5A5P7XZ6QSVKXAJ7UHBCLG","short_pith_number":"pith:PPRK5A5P","canonical_record":{"source":{"id":"1010.5503","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-10-26T20:01:37Z","cross_cats_sorted":["stat.CO","stat.ML"],"title_canon_sha256":"6a20e118a513366e75c3bc67da5a6967d5b34da89175baebdc4d39abc929cda2","abstract_canon_sha256":"4886a085bba073b5188e608c5dd28e743dee2a1a9400700a4f9273d5d78ba6ef"},"schema_version":"1.0"},"canonical_sha256":"7be2ae83affdf3e84aaab813fa1c22598cd0bfd0d32ad721727b261a865066d2","source":{"kind":"arxiv","id":"1010.5503","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1010.5503","created_at":"2026-05-18T04:32:45Z"},{"alias_kind":"arxiv_version","alias_value":"1010.5503v3","created_at":"2026-05-18T04:32:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1010.5503","created_at":"2026-05-18T04:32:45Z"},{"alias_kind":"pith_short_12","alias_value":"PPRK5A5P7XZ6","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_16","alias_value":"PPRK5A5P7XZ6QSVK","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_8","alias_value":"PPRK5A5P","created_at":"2026-05-18T12:26:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:PPRK5A5P7XZ6QSVKXAJ7UHBCLG","target":"record","payload":{"canonical_record":{"source":{"id":"1010.5503","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-10-26T20:01:37Z","cross_cats_sorted":["stat.CO","stat.ML"],"title_canon_sha256":"6a20e118a513366e75c3bc67da5a6967d5b34da89175baebdc4d39abc929cda2","abstract_canon_sha256":"4886a085bba073b5188e608c5dd28e743dee2a1a9400700a4f9273d5d78ba6ef"},"schema_version":"1.0"},"canonical_sha256":"7be2ae83affdf3e84aaab813fa1c22598cd0bfd0d32ad721727b261a865066d2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:32:45.399147Z","signature_b64":"0yZR9Ke9x+mzHO2N6mPKzXsSq2/eBoltXlV+1wEMkDSIvtbyo8bwOwt0AsH07ZHKi1OS+nupvjJ3dEu7j+bdDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7be2ae83affdf3e84aaab813fa1c22598cd0bfd0d32ad721727b261a865066d2","last_reissued_at":"2026-05-18T04:32:45.398572Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:32:45.398572Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1010.5503","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:32:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mMDGKLXUceG8HcTUkpgxlUP21ltPddeEtaDSVCfAAdgCM7lxhprJPf7GEH1TyR/lhBK6d3VRnaaWedI/43h+Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T01:44:31.085843Z"},"content_sha256":"7a80e94d546347e4fa33d75219b3370e57dd24e63e3bf80a6f0698377249fea4","schema_version":"1.0","event_id":"sha256:7a80e94d546347e4fa33d75219b3370e57dd24e63e3bf80a6f0698377249fea4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:PPRK5A5P7XZ6QSVKXAJ7UHBCLG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A GMBCG Galaxy Cluster Catalog of 55,424 Rich Clusters from SDSS DR7","license":"http://creativecommons.org/licenses/by/3.0/","headline":"","cross_cats":["stat.CO","stat.ML"],"primary_cat":"astro-ph.CO","authors_text":"August Evrard, Benjamin P. Koester, David E. Johnston, David Gerdes, Eduardo Rozo, Eli S. Rykoff, Erin Sheldon, James Annis, Jiangang Hao, Matthew Becker, Michael Busha, Risa H. Wechsler, Seth R. Siegel, Timothy A. McKay","submitted_at":"2010-10-26T20:01:37Z","abstract_excerpt":"We present a large catalog of optically selected galaxy clusters from the application of a new Gaussian Mixture Brightest Cluster Galaxy (GMBCG) algorithm to SDSS Data Release 7 data. The algorithm detects clusters by identifying the red sequence plus Brightest Cluster Galaxy (BCG) feature, which is unique for galaxy clusters and does not exist among field galaxies. Red sequence clustering in color space is detected using an Error Corrected Gaussian Mixture Model. We run GMBCG on 8240 square degrees of photometric data from SDSS DR7 to assemble the largest ever optical galaxy cluster catalog, "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1010.5503","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:32:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MKI2FhE1AmixbIs4xLr4mA36vF+Cc3Z8/H0Yu1ktFNKmjtlSiDdOtVIpffT5dN2/7+KfqP+C5ZDrGSmd6PajAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T01:44:31.086200Z"},"content_sha256":"749e0b85d8ad3b29a32ee91779ed14c9066f0b4cd39b1c3a8aa6f9b7785edfec","schema_version":"1.0","event_id":"sha256:749e0b85d8ad3b29a32ee91779ed14c9066f0b4cd39b1c3a8aa6f9b7785edfec"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PPRK5A5P7XZ6QSVKXAJ7UHBCLG/bundle.json","state_url":"https://pith.science/pith/PPRK5A5P7XZ6QSVKXAJ7UHBCLG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PPRK5A5P7XZ6QSVKXAJ7UHBCLG/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-02T01:44:31Z","links":{"resolver":"https://pith.science/pith/PPRK5A5P7XZ6QSVKXAJ7UHBCLG","bundle":"https://pith.science/pith/PPRK5A5P7XZ6QSVKXAJ7UHBCLG/bundle.json","state":"https://pith.science/pith/PPRK5A5P7XZ6QSVKXAJ7UHBCLG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PPRK5A5P7XZ6QSVKXAJ7UHBCLG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:PPRK5A5P7XZ6QSVKXAJ7UHBCLG","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":"4886a085bba073b5188e608c5dd28e743dee2a1a9400700a4f9273d5d78ba6ef","cross_cats_sorted":["stat.CO","stat.ML"],"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-10-26T20:01:37Z","title_canon_sha256":"6a20e118a513366e75c3bc67da5a6967d5b34da89175baebdc4d39abc929cda2"},"schema_version":"1.0","source":{"id":"1010.5503","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1010.5503","created_at":"2026-05-18T04:32:45Z"},{"alias_kind":"arxiv_version","alias_value":"1010.5503v3","created_at":"2026-05-18T04:32:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1010.5503","created_at":"2026-05-18T04:32:45Z"},{"alias_kind":"pith_short_12","alias_value":"PPRK5A5P7XZ6","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_16","alias_value":"PPRK5A5P7XZ6QSVK","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_8","alias_value":"PPRK5A5P","created_at":"2026-05-18T12:26:12Z"}],"graph_snapshots":[{"event_id":"sha256:749e0b85d8ad3b29a32ee91779ed14c9066f0b4cd39b1c3a8aa6f9b7785edfec","target":"graph","created_at":"2026-05-18T04:32:45Z","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 present a large catalog of optically selected galaxy clusters from the application of a new Gaussian Mixture Brightest Cluster Galaxy (GMBCG) algorithm to SDSS Data Release 7 data. The algorithm detects clusters by identifying the red sequence plus Brightest Cluster Galaxy (BCG) feature, which is unique for galaxy clusters and does not exist among field galaxies. Red sequence clustering in color space is detected using an Error Corrected Gaussian Mixture Model. We run GMBCG on 8240 square degrees of photometric data from SDSS DR7 to assemble the largest ever optical galaxy cluster catalog, ","authors_text":"August Evrard, Benjamin P. Koester, David E. Johnston, David Gerdes, Eduardo Rozo, Eli S. Rykoff, Erin Sheldon, James Annis, Jiangang Hao, Matthew Becker, Michael Busha, Risa H. Wechsler, Seth R. Siegel, Timothy A. McKay","cross_cats":["stat.CO","stat.ML"],"headline":"","license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-10-26T20:01:37Z","title":"A GMBCG Galaxy Cluster Catalog of 55,424 Rich Clusters from SDSS DR7"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1010.5503","kind":"arxiv","version":3},"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":"sha256:7a80e94d546347e4fa33d75219b3370e57dd24e63e3bf80a6f0698377249fea4","target":"record","created_at":"2026-05-18T04:32:45Z","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":"4886a085bba073b5188e608c5dd28e743dee2a1a9400700a4f9273d5d78ba6ef","cross_cats_sorted":["stat.CO","stat.ML"],"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-10-26T20:01:37Z","title_canon_sha256":"6a20e118a513366e75c3bc67da5a6967d5b34da89175baebdc4d39abc929cda2"},"schema_version":"1.0","source":{"id":"1010.5503","kind":"arxiv","version":3}},"canonical_sha256":"7be2ae83affdf3e84aaab813fa1c22598cd0bfd0d32ad721727b261a865066d2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7be2ae83affdf3e84aaab813fa1c22598cd0bfd0d32ad721727b261a865066d2","first_computed_at":"2026-05-18T04:32:45.398572Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:32:45.398572Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0yZR9Ke9x+mzHO2N6mPKzXsSq2/eBoltXlV+1wEMkDSIvtbyo8bwOwt0AsH07ZHKi1OS+nupvjJ3dEu7j+bdDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:32:45.399147Z","signed_message":"canonical_sha256_bytes"},"source_id":"1010.5503","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7a80e94d546347e4fa33d75219b3370e57dd24e63e3bf80a6f0698377249fea4","sha256:749e0b85d8ad3b29a32ee91779ed14c9066f0b4cd39b1c3a8aa6f9b7785edfec"],"state_sha256":"70787febc3bfbdd3381596d1ac704361a3137af14e76e6d0c783bbe0bff965bb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EpJ5t7jZizdlcfevLn3dGLb2Jm+GwfOA+/LD+2NiVQpRqe1Kh8OMz6izptnNuaguQEnNlkWML82aMDPYUSubBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T01:44:31.088156Z","bundle_sha256":"dbc25b245aaaa567662893601d08d849b04d2526b2e42e975addd499dd5e8c4a"}}