{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:C24X7LZE5LRGLATSUMHFR4V7XN","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":"50f161eb421366ca518abc734c4f5f896a6c576a394c356c515d728d3d00622e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-06-04T20:54:12Z","title_canon_sha256":"130f542c7418a0fbb3b6a24f6abb2a76b68985453e5f01e61a3209b86ae5f44b"},"schema_version":"1.0","source":{"id":"0806.0862","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0806.0862","created_at":"2026-05-18T04:29:33Z"},{"alias_kind":"arxiv_version","alias_value":"0806.0862v2","created_at":"2026-05-18T04:29:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0806.0862","created_at":"2026-05-18T04:29:33Z"},{"alias_kind":"pith_short_12","alias_value":"C24X7LZE5LRG","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_16","alias_value":"C24X7LZE5LRGLATS","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_8","alias_value":"C24X7LZE","created_at":"2026-05-18T12:25:57Z"}],"graph_snapshots":[{"event_id":"sha256:0e99e509e6c1f77135a2d129920d75ec8a93247a09c385fed70db72a315d321b","target":"graph","created_at":"2026-05-18T04:29:33Z","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":"Galaxies hosting z~2 quasars are the high-$z$ progenitors of today's massive `red-and-dead' galaxies. With close pairs of quasars at different redshifts, a background quasar can be used to study a foreground quasar's halo gas in absorption, providing a wealth of information about feedback, quenching, and the physics of massive galaxy formation. We present a Keck/HIRES spectrum of the bright background quasar in a projected pair with angular separation 13.3\" corresponding to 108kpc at the redshift of the foreground quasar z_fg=2.4360 +/- 0.0005, precisely determined from Gemini/GNIRS near-IR sp","authors_text":"(2) UC Berkeley), Joseph F. Hennawi (2) ((1) UCO/Lick Observatory, J. Xavier Prochaska (1)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-06-04T20:54:12Z","title":"Quasars Probing Quasars III: New Clues to Feedback, Quenching, and the Physics of Massive Galaxy Formation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0806.0862","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":"sha256:93cf88acfc692c829e17cccbf5576a8f41cc34c8caf47b38da87b368d2fed72d","target":"record","created_at":"2026-05-18T04:29:33Z","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":"50f161eb421366ca518abc734c4f5f896a6c576a394c356c515d728d3d00622e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-06-04T20:54:12Z","title_canon_sha256":"130f542c7418a0fbb3b6a24f6abb2a76b68985453e5f01e61a3209b86ae5f44b"},"schema_version":"1.0","source":{"id":"0806.0862","kind":"arxiv","version":2}},"canonical_sha256":"16b97faf24eae2658272a30e58f2bfbb758f94c8fcba2958ea276737df80992e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"16b97faf24eae2658272a30e58f2bfbb758f94c8fcba2958ea276737df80992e","first_computed_at":"2026-05-18T04:29:33.485055Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:29:33.485055Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"S9VxNClBU2qSlrgg1SB3DzNTtziwNLtBmpcq4VmfFVpxuOnuSBlE1vDdreYMyKcawlwxTv5iVEDDRbNsmVGHAA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:29:33.485417Z","signed_message":"canonical_sha256_bytes"},"source_id":"0806.0862","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:93cf88acfc692c829e17cccbf5576a8f41cc34c8caf47b38da87b368d2fed72d","sha256:0e99e509e6c1f77135a2d129920d75ec8a93247a09c385fed70db72a315d321b"],"state_sha256":"823669274a1b950b0e6fc631ef9ada24ce54422f893ebafc2ff422e54530cfde"}