{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:XQE4KMAM3BQSBKNBYTIWECFG25","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":"afdf672026e27f2caeaffbb2f7e6d3726706c29ececf6c230786c293b4b43a6f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-11-03T19:59:45Z","title_canon_sha256":"f138ba29a8e81a76e3bffebe1ef7882388a34f2eb3b2f60dee6d9dbe1234905c"},"schema_version":"1.0","source":{"id":"1011.0991","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1011.0991","created_at":"2026-05-18T04:03:54Z"},{"alias_kind":"arxiv_version","alias_value":"1011.0991v1","created_at":"2026-05-18T04:03:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1011.0991","created_at":"2026-05-18T04:03:54Z"},{"alias_kind":"pith_short_12","alias_value":"XQE4KMAM3BQS","created_at":"2026-05-18T12:26:17Z"},{"alias_kind":"pith_short_16","alias_value":"XQE4KMAM3BQSBKNB","created_at":"2026-05-18T12:26:17Z"},{"alias_kind":"pith_short_8","alias_value":"XQE4KMAM","created_at":"2026-05-18T12:26:17Z"}],"graph_snapshots":[{"event_id":"sha256:4f4b73da83be69a8cfc46f529a5e47eff95b91b5b36ed74bff1608270c9cebb0","target":"graph","created_at":"2026-05-18T04:03:54Z","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 detection of HCO+(J=4-3) emission in the Cloverleaf Quasar at z=2.56, using the IRAM Plateau de Bure Interferometer. HCO+ emission is a star formation indicator similar to HCN, tracing dense molecular hydrogen gas (n(H2) ~= 10^5 cm^-3) within star-forming molecular clouds. We derive a lensing-corrected HCO+(J=4-3) line luminosity of L'(HCO+(4-3)) = (1.6+/-0.3) x 10^9 (mu_L/11)^-1 K km/s pc^2, which corresponds to only 48% of the HCO+(J=1=0) luminosity, and <~4% of the CO(J=3-2) luminosity. The HCO+ excitation thus is clearly subthermal in the J=4-3 transition. Modeling of the HCO","authors_text":"2, (2) MPIA, (3) Nrao, (4) IRAM, (5) MPIfR, (6) AIfA, 7), (7) Hubble Fellow), Axel Weiss (5), Christopher L. Carilli (3), Dominik A. Riechers (1, Fabian Walter (2), Frank Bertoldi (6), Karl M. Menten (5) ((1) Caltech, Pierre Cox (4)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-11-03T19:59:45Z","title":"Dense Molecular Gas Excitation at High Redshift: Detection of HCO+(J=4-3) Emission in the Cloverleaf Quasar"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1011.0991","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":"sha256:7884b12eb153effe8f4d36a5bf39225da6d054aba3be974b19050f4172c314a2","target":"record","created_at":"2026-05-18T04:03:54Z","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":"afdf672026e27f2caeaffbb2f7e6d3726706c29ececf6c230786c293b4b43a6f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-11-03T19:59:45Z","title_canon_sha256":"f138ba29a8e81a76e3bffebe1ef7882388a34f2eb3b2f60dee6d9dbe1234905c"},"schema_version":"1.0","source":{"id":"1011.0991","kind":"arxiv","version":1}},"canonical_sha256":"bc09c5300cd86120a9a1c4d16208a6d7604dd0539022286eb8f8701e7eddf630","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bc09c5300cd86120a9a1c4d16208a6d7604dd0539022286eb8f8701e7eddf630","first_computed_at":"2026-05-18T04:03:54.621681Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:03:54.621681Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2Etk8fIj0mtNkxcOS+pyMp63dnvtROFL1hpJ9UUsv4sz81iXOZfyxe335L4evpkpq7cv74pAdOLHdwbLt121Ag==","signature_status":"signed_v1","signed_at":"2026-05-18T04:03:54.622168Z","signed_message":"canonical_sha256_bytes"},"source_id":"1011.0991","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7884b12eb153effe8f4d36a5bf39225da6d054aba3be974b19050f4172c314a2","sha256:4f4b73da83be69a8cfc46f529a5e47eff95b91b5b36ed74bff1608270c9cebb0"],"state_sha256":"1fa30982eab42fb7fe0db8d3a94c2c6239b20eaa07991d2899e1959568624670"}