{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:ZABJYHOHBA6T4XRGZEX42P7DNU","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":"ec4960f66891abc7557a59f74c38383dc3a7d13691b69c4dc82def70b755bfd9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-04-07T20:00:02Z","title_canon_sha256":"5308ce3c3dacc7ed69aa4592f1e255d6272d98968be6c12dc433a9e2b49c1800"},"schema_version":"1.0","source":{"id":"1604.02147","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.02147","created_at":"2026-05-18T01:08:42Z"},{"alias_kind":"arxiv_version","alias_value":"1604.02147v2","created_at":"2026-05-18T01:08:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.02147","created_at":"2026-05-18T01:08:42Z"},{"alias_kind":"pith_short_12","alias_value":"ZABJYHOHBA6T","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_16","alias_value":"ZABJYHOHBA6T4XRG","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_8","alias_value":"ZABJYHOH","created_at":"2026-05-18T12:30:53Z"}],"graph_snapshots":[{"event_id":"sha256:9e524af2a887b86eecc6635a572e0beedce02615178ea297eabc1dfa39537b0d","target":"graph","created_at":"2026-05-18T01:08:42Z","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":"Accurate modeling of galaxy formation in a hierarchical, cold dark matter universe requires the use of sufficiently high-resolution merger trees to obtain convergence in the predicted properties of galaxies. When semi-analytic galaxy formation models are applied to cosmological N-body simulation merger trees, it is often the case that those trees have insufficient resolution to give converged galaxy properties. We demonstrate a method to augment the resolution of N-body merger trees by grafting in branches of Monte Carlo merger trees with higher resolution, but which are consistent with the pr","authors_text":"(2) Caltech, (3) University of Durham), Andrew J. Benson (1), Chris Cannella (2), Shaun Cole (3) ((1) Carnegie Observatories","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-04-07T20:00:02Z","title":"Achieving Convergence in Galaxy Formation Models by Augmenting N-body Merger Trees"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.02147","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:bfb30f6648e2d50374b56ee0c9987e67ff52353c72fc9eeed6caae892611676a","target":"record","created_at":"2026-05-18T01:08:42Z","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":"ec4960f66891abc7557a59f74c38383dc3a7d13691b69c4dc82def70b755bfd9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-04-07T20:00:02Z","title_canon_sha256":"5308ce3c3dacc7ed69aa4592f1e255d6272d98968be6c12dc433a9e2b49c1800"},"schema_version":"1.0","source":{"id":"1604.02147","kind":"arxiv","version":2}},"canonical_sha256":"c8029c1dc7083d3e5e26c92fcd3fe36d3dca77f80a08990c01c548de7eb2a2a3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c8029c1dc7083d3e5e26c92fcd3fe36d3dca77f80a08990c01c548de7eb2a2a3","first_computed_at":"2026-05-18T01:08:42.027537Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:08:42.027537Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"u/fFRctZoMjjF8SLBr4221W9O1jiV9zMs/JhlLaOt7BHy2dfDopFruE8O0ocLzgwCWNUPbr80/D44SB1KXVHBw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:08:42.028126Z","signed_message":"canonical_sha256_bytes"},"source_id":"1604.02147","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bfb30f6648e2d50374b56ee0c9987e67ff52353c72fc9eeed6caae892611676a","sha256:9e524af2a887b86eecc6635a572e0beedce02615178ea297eabc1dfa39537b0d"],"state_sha256":"f129d91f7cb5967f96b72814bbd37140f116cc3202100a57fd840f00f9c32528"}