{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:ILNOWWLOI3KHJJW6UAHGR5DR4W","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":"bff44f08c3935b0075f0a4319c79ff1c7769d6ad11dbb7147ff17a5585784d15","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-10-16T08:35:55Z","title_canon_sha256":"8ec78afd69fd9e68be6192d651b61f540bd93d7e1bca5e226e7043c998c67e51"},"schema_version":"1.0","source":{"id":"1510.04816","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.04816","created_at":"2026-05-18T01:24:51Z"},{"alias_kind":"arxiv_version","alias_value":"1510.04816v1","created_at":"2026-05-18T01:24:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.04816","created_at":"2026-05-18T01:24:51Z"},{"alias_kind":"pith_short_12","alias_value":"ILNOWWLOI3KH","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_16","alias_value":"ILNOWWLOI3KHJJW6","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_8","alias_value":"ILNOWWLO","created_at":"2026-05-18T12:29:25Z"}],"graph_snapshots":[{"event_id":"sha256:ffdcd186738dfce8f03b593043245549df0e56e9ba123a59584b9dcac36a747d","target":"graph","created_at":"2026-05-18T01:24:51Z","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 the discovery of an extremely dense group of massive galaxies at the centre of the protocluster at $z=3.09$ in the SSA22 field from near-infrared spectroscopy conducted with the Multi-Object InfraRed Camera and Spectrograph (MOIRCS) equipped on the Subaru Telecope. The newly discovered group comprises seven galaxies confirmed at $z_{\\rm spec}\\approx3.09$ within 180 kpc including five massive objects with the stellar masses larger than $10^{10.5}~M_{\\odot}$ and is associated with a bright sub-mm source SSA22-AzTEC14. The dynamical mass of the group estimated from the line-of-sight vel","authors_text":"H. Umehata, I. Tanaka, M. Kajisawa, M. Kubo, T. Ichikawa, T. Yamada, Y. Matsuda","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-10-16T08:35:55Z","title":"An extremely dense group of massive galaxies at the centre of the protocluster at z = 3.09 in the SSA22 field"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.04816","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:b8cb223ba3bc619ad75edda631ed635e2fc728d9bcf168ebfbc8c3ca3671f535","target":"record","created_at":"2026-05-18T01:24:51Z","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":"bff44f08c3935b0075f0a4319c79ff1c7769d6ad11dbb7147ff17a5585784d15","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-10-16T08:35:55Z","title_canon_sha256":"8ec78afd69fd9e68be6192d651b61f540bd93d7e1bca5e226e7043c998c67e51"},"schema_version":"1.0","source":{"id":"1510.04816","kind":"arxiv","version":1}},"canonical_sha256":"42daeb596e46d474a6dea00e68f471e5ba1804eef38499521fb5bff6aea93126","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"42daeb596e46d474a6dea00e68f471e5ba1804eef38499521fb5bff6aea93126","first_computed_at":"2026-05-18T01:24:51.586509Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:24:51.586509Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KGFz6y11A/+RY7XYGncPO0tw1LjWKs9LQNUITAf87wli/2xQf7PzLWG81gC3kYgD3nX1CxGtjdgODART43VkDg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:24:51.587293Z","signed_message":"canonical_sha256_bytes"},"source_id":"1510.04816","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b8cb223ba3bc619ad75edda631ed635e2fc728d9bcf168ebfbc8c3ca3671f535","sha256:ffdcd186738dfce8f03b593043245549df0e56e9ba123a59584b9dcac36a747d"],"state_sha256":"82ed015c96dfa68d1982fbdfe342a0fa91997a5deee0389894cfe7ca76490544"}