{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:6IBKZUHEI6FY32VVGL7L26VBKF","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":"8ed17c1a275ce280fe164de932ab9e4c47a8872211476a0c22bffcacff6b6cca","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-05-04T06:38:26Z","title_canon_sha256":"43323fd95042424dfde839929af7bdfe218971c9018dabbde7e37e030b06a7c6"},"schema_version":"1.0","source":{"id":"1305.0882","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1305.0882","created_at":"2026-05-18T01:50:12Z"},{"alias_kind":"arxiv_version","alias_value":"1305.0882v1","created_at":"2026-05-18T01:50:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1305.0882","created_at":"2026-05-18T01:50:12Z"},{"alias_kind":"pith_short_12","alias_value":"6IBKZUHEI6FY","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_16","alias_value":"6IBKZUHEI6FY32VV","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_8","alias_value":"6IBKZUHE","created_at":"2026-05-18T12:27:36Z"}],"graph_snapshots":[{"event_id":"sha256:606e33ec1eafa3f5247cb5005c673bddaefbb6e5454e777993a4b2068fd26150","target":"graph","created_at":"2026-05-18T01:50:12Z","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":"Recent independent results from numerical simulations and observations have shown that brightest cluster galaxies (BCGs) have increased their stellar mass by a factor of almost two between z~0.9 and z~0.2. The numerical simulations further suggest that more than half this mass is accreted through major mergers. Using a sample of 18 distant galaxy clusters with over 600 spectroscopically confirmed cluster members between them, we search for observational evidence that major mergers do play a significant role. We find a major merger rate of 0.38 +/- 0.14 mergers per Gyr at z~1. While the uncerta","authors_text":"A. E. Bauer, A. J. Faloon, A. Muzzin, A. Noble, A. Rettura, C. Lidman, D. Gilbank, E. Ellingson, G. Iacobuta, G. Wilson, H. K. C. Yee, J. Meyers, J. Nantais, L. Delaye, L. F. Barrientos, M. Huertas-Company, P. Cerulo, P. Rosati, R. Demarco, R. Sanchez-Janssen, R. Yan, S. Mei, T. M. A. Webb, V. Strazzullo, W. J. Couch","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-05-04T06:38:26Z","title":"The importance of major mergers in the build up of stellar mass in brightest cluster galaxies at z=1"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1305.0882","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":"sha256:59802c1cde6fe0b4bf90166ebb3c9f322ce8d94fdd07a6f1be37c94c2fc99473","target":"record","created_at":"2026-05-18T01:50:12Z","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":"8ed17c1a275ce280fe164de932ab9e4c47a8872211476a0c22bffcacff6b6cca","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-05-04T06:38:26Z","title_canon_sha256":"43323fd95042424dfde839929af7bdfe218971c9018dabbde7e37e030b06a7c6"},"schema_version":"1.0","source":{"id":"1305.0882","kind":"arxiv","version":1}},"canonical_sha256":"f202acd0e4478b8deab532febd7aa1516eda972f725430672de1332cffee9e5b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f202acd0e4478b8deab532febd7aa1516eda972f725430672de1332cffee9e5b","first_computed_at":"2026-05-18T01:50:12.344816Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:50:12.344816Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2BeQ/fU2OkaQchlUbdmYEGeZcNvWRGMLVaVCHZT8jV5TtJJi2tUGFDdlDXr8+CoW0KpBR2V4kW+yOTkK2lgXBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:50:12.345454Z","signed_message":"canonical_sha256_bytes"},"source_id":"1305.0882","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:59802c1cde6fe0b4bf90166ebb3c9f322ce8d94fdd07a6f1be37c94c2fc99473","sha256:606e33ec1eafa3f5247cb5005c673bddaefbb6e5454e777993a4b2068fd26150"],"state_sha256":"dfbfc874fdd344fd342cb27a41c1be8a376c1dd8ef99bc66faba166d3a54e26f"}