{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:RI3PTTY7UPCF2X37FCB6O66LC3","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":"8eafec95ac788cd600bc85bce45ab7b8347e8cb55e637dd3098cdf026bd0a896","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-10-01T07:45:29Z","title_canon_sha256":"82733e230539321e9fbecb9b15463fb3619e4eae499a3e253030690e3b8e35f2"},"schema_version":"1.0","source":{"id":"1210.0302","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1210.0302","created_at":"2026-05-18T01:54:12Z"},{"alias_kind":"arxiv_version","alias_value":"1210.0302v1","created_at":"2026-05-18T01:54:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.0302","created_at":"2026-05-18T01:54:12Z"},{"alias_kind":"pith_short_12","alias_value":"RI3PTTY7UPCF","created_at":"2026-05-18T12:27:20Z"},{"alias_kind":"pith_short_16","alias_value":"RI3PTTY7UPCF2X37","created_at":"2026-05-18T12:27:20Z"},{"alias_kind":"pith_short_8","alias_value":"RI3PTTY7","created_at":"2026-05-18T12:27:20Z"}],"graph_snapshots":[{"event_id":"sha256:bda9b5aed64c85d67088acda0f61f73144ece09cfdd395a62c5a2d5bf14fe3a3","target":"graph","created_at":"2026-05-18T01:54:12Z","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":"(Abridged) We report the discovery of an X-ray group of galaxies located at a high redshift of z=1.61 in the Chandra Deep Field South. The group is first identified as an extended X-ray source. We use a wealth of deep multi-wavelength data to identify the optical counterpart -- our red sequence finder detects a significant over-density of galaxies at z~1.6 and the brightest group galaxy is spectroscopically confirmed at z=1.61. We measure an X-ray luminosity of L_{0.1-2.4 keV}= 1.8\\pm0.6 \\times 10^{43} erg/s, which then translates into a group mass of 3.2\\pm0.8 \\times 10^{13} M_sun. This is th","authors_text":"Alexis Finoguenov, David J. Wilman, John S. Mulchaey, Masayuki Tanaka, Mohammad Mirkazemi, Nico Cappelluti, William N. Brandt, Yongquan Xue, Yoshihiro Ueda","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-10-01T07:45:29Z","title":"An X-ray Detected Group of Quiescent Early-type Galaxies at z=1.6 in the Chandra Deep Field South"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.0302","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:c9503358e336032cec0ddbddc3419e40ef72d70913fde95e2341dae097eefa98","target":"record","created_at":"2026-05-18T01:54:12Z","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":"8eafec95ac788cd600bc85bce45ab7b8347e8cb55e637dd3098cdf026bd0a896","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-10-01T07:45:29Z","title_canon_sha256":"82733e230539321e9fbecb9b15463fb3619e4eae499a3e253030690e3b8e35f2"},"schema_version":"1.0","source":{"id":"1210.0302","kind":"arxiv","version":1}},"canonical_sha256":"8a36f9cf1fa3c45d5f7f2883e77bcb16d6bc751efdb2cee12a4ff63f67547dad","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8a36f9cf1fa3c45d5f7f2883e77bcb16d6bc751efdb2cee12a4ff63f67547dad","first_computed_at":"2026-05-18T01:54:12.269769Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:54:12.269769Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ju69anPk+RpyjXBhEvz34OEgmu3EJlMy1qlMaIi1u5lZ/hpoTtS8mGS4Ic5Fe5MuUGj4LBTcryo/SxlmC3gUBA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:54:12.270528Z","signed_message":"canonical_sha256_bytes"},"source_id":"1210.0302","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c9503358e336032cec0ddbddc3419e40ef72d70913fde95e2341dae097eefa98","sha256:bda9b5aed64c85d67088acda0f61f73144ece09cfdd395a62c5a2d5bf14fe3a3"],"state_sha256":"366ee60646b389e73c83da7ab83722c85d513a1e91b7dd5c33b39cfba1a827da"}