{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2012:33DIEEVD67445GFPAK3PNLSK6U","short_pith_number":"pith:33DIEEVD","schema_version":"1.0","canonical_sha256":"dec68212a3f7f9ce98af02b6f6ae4af524f188fdf849ea66506c47aed758494a","source":{"kind":"arxiv","id":"1202.4767","version":1},"attestation_state":"computed","paper":{"title":"Evolution of Group Galaxies from the First Red-Sequence Cluster Survey","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"B. C. Hsieh, H. K. C. Yee, I. H. Li, M. Gladders","submitted_at":"2012-02-21T21:07:57Z","abstract_excerpt":"We study the evolution of the red galaxy fraction (f_red) in 905 galaxy groups with 0.15 < z < 0.52. The galaxy groups are identified by the `probability Friends-of-Friends' algorithm from the first Red-Sequence Cluster Survey (RCS1) photometric-redshift sample. There is a high degree of uniformity in the properties of the red-sequence of the group galaxies, indicating that the luminous red-sequence galaxies in the groups are already in place by z~0.5 and that they have a formation epoch of z>2. In general, groups at lower redshifts exhibit larger f_red than those at higher redshifts, showing "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1202.4767","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-02-21T21:07:57Z","cross_cats_sorted":[],"title_canon_sha256":"958520fe669cc0cb0f59997f65801a21419aa24db82485415821b3abf78ebbd7","abstract_canon_sha256":"998b8eb14b95322bc464709f8914146abf900396b25bb9d603990aeb42c3696f"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:58:22.670530Z","signature_b64":"hxCqhfuYEw2uWWKwTFfPvVOGatud/4RFdrjbODjL2UR/QXqR1kyDvSCrmH6cU7iRr9diqM7yK6uCnRQvSp4bCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dec68212a3f7f9ce98af02b6f6ae4af524f188fdf849ea66506c47aed758494a","last_reissued_at":"2026-05-18T01:58:22.669945Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:58:22.669945Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Evolution of Group Galaxies from the First Red-Sequence Cluster Survey","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"B. C. Hsieh, H. K. C. Yee, I. H. Li, M. Gladders","submitted_at":"2012-02-21T21:07:57Z","abstract_excerpt":"We study the evolution of the red galaxy fraction (f_red) in 905 galaxy groups with 0.15 < z < 0.52. The galaxy groups are identified by the `probability Friends-of-Friends' algorithm from the first Red-Sequence Cluster Survey (RCS1) photometric-redshift sample. There is a high degree of uniformity in the properties of the red-sequence of the group galaxies, indicating that the luminous red-sequence galaxies in the groups are already in place by z~0.5 and that they have a formation epoch of z>2. In general, groups at lower redshifts exhibit larger f_red than those at higher redshifts, showing "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.4767","kind":"arxiv","version":1},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1202.4767","created_at":"2026-05-18T01:58:22.670035+00:00"},{"alias_kind":"arxiv_version","alias_value":"1202.4767v1","created_at":"2026-05-18T01:58:22.670035+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.4767","created_at":"2026-05-18T01:58:22.670035+00:00"},{"alias_kind":"pith_short_12","alias_value":"33DIEEVD6744","created_at":"2026-05-18T12:26:50.516681+00:00"},{"alias_kind":"pith_short_16","alias_value":"33DIEEVD67445GFP","created_at":"2026-05-18T12:26:50.516681+00:00"},{"alias_kind":"pith_short_8","alias_value":"33DIEEVD","created_at":"2026-05-18T12:26:50.516681+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/33DIEEVD67445GFPAK3PNLSK6U","json":"https://pith.science/pith/33DIEEVD67445GFPAK3PNLSK6U.json","graph_json":"https://pith.science/api/pith-number/33DIEEVD67445GFPAK3PNLSK6U/graph.json","events_json":"https://pith.science/api/pith-number/33DIEEVD67445GFPAK3PNLSK6U/events.json","paper":"https://pith.science/paper/33DIEEVD"},"agent_actions":{"view_html":"https://pith.science/pith/33DIEEVD67445GFPAK3PNLSK6U","download_json":"https://pith.science/pith/33DIEEVD67445GFPAK3PNLSK6U.json","view_paper":"https://pith.science/paper/33DIEEVD","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1202.4767&json=true","fetch_graph":"https://pith.science/api/pith-number/33DIEEVD67445GFPAK3PNLSK6U/graph.json","fetch_events":"https://pith.science/api/pith-number/33DIEEVD67445GFPAK3PNLSK6U/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/33DIEEVD67445GFPAK3PNLSK6U/action/timestamp_anchor","attest_storage":"https://pith.science/pith/33DIEEVD67445GFPAK3PNLSK6U/action/storage_attestation","attest_author":"https://pith.science/pith/33DIEEVD67445GFPAK3PNLSK6U/action/author_attestation","sign_citation":"https://pith.science/pith/33DIEEVD67445GFPAK3PNLSK6U/action/citation_signature","submit_replication":"https://pith.science/pith/33DIEEVD67445GFPAK3PNLSK6U/action/replication_record"}},"created_at":"2026-05-18T01:58:22.670035+00:00","updated_at":"2026-05-18T01:58:22.670035+00:00"}