{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:JIIENLQYIC7OSDT4ODDPFKGO6H","short_pith_number":"pith:JIIENLQY","canonical_record":{"source":{"id":"1004.2699","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-04-15T19:45:52Z","cross_cats_sorted":[],"title_canon_sha256":"20f5530bb5428385d24a4470ba5c0d922de1a7dd52101ea10e7104ba8114fbaa","abstract_canon_sha256":"818194b8d91b703cffb954a1b067c54003d031bd4e3deac06f6072f0bd15079a"},"schema_version":"1.0"},"canonical_sha256":"4a1046ae1840bee90e7c70c6f2a8cef1eea68e2fdff82d3b112ee7b9b68f1bf4","source":{"kind":"arxiv","id":"1004.2699","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1004.2699","created_at":"2026-05-18T02:08:05Z"},{"alias_kind":"arxiv_version","alias_value":"1004.2699v1","created_at":"2026-05-18T02:08:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1004.2699","created_at":"2026-05-18T02:08:05Z"},{"alias_kind":"pith_short_12","alias_value":"JIIENLQYIC7O","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_16","alias_value":"JIIENLQYIC7OSDT4","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_8","alias_value":"JIIENLQY","created_at":"2026-05-18T12:26:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:JIIENLQYIC7OSDT4ODDPFKGO6H","target":"record","payload":{"canonical_record":{"source":{"id":"1004.2699","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-04-15T19:45:52Z","cross_cats_sorted":[],"title_canon_sha256":"20f5530bb5428385d24a4470ba5c0d922de1a7dd52101ea10e7104ba8114fbaa","abstract_canon_sha256":"818194b8d91b703cffb954a1b067c54003d031bd4e3deac06f6072f0bd15079a"},"schema_version":"1.0"},"canonical_sha256":"4a1046ae1840bee90e7c70c6f2a8cef1eea68e2fdff82d3b112ee7b9b68f1bf4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:08:05.077383Z","signature_b64":"dcjQGBxyCwUY4Lpo0r695DeAyik7v0FHnN6cuUNw6P8vNr6q/La0bkGBJzmCJq/YYMOemO2MswHLHPQyfmQRDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4a1046ae1840bee90e7c70c6f2a8cef1eea68e2fdff82d3b112ee7b9b68f1bf4","last_reissued_at":"2026-05-18T02:08:05.076638Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:08:05.076638Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1004.2699","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:08:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WnSEar5lMSVnfvP3ut/Gs9I7k7CY2mkjY00QQK9A4+AZ+ui4AC8qonuvaO9tTBvpzASFJPB+4GmPOOK7d0IaBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T15:27:53.249493Z"},"content_sha256":"e76ebde04b4c944c95477216d141f7f9a65ad661e751a87c8ce97d59ece14386","schema_version":"1.0","event_id":"sha256:e76ebde04b4c944c95477216d141f7f9a65ad661e751a87c8ce97d59ece14386"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:JIIENLQYIC7OSDT4ODDPFKGO6H","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Weak 13CO in the Cloverleaf Quasar: evidence for a young, early generation starburst","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. Weiss, C. Henkel, D. Downes, D. Riechers, F. Walter","submitted_at":"2010-04-15T19:45:52Z","abstract_excerpt":"Observations of 12CO at high redshift indicate rapid metal enrichment in the nuclear regions of at least some galaxies in the early universe. However, the enrichment may be limited to nuclei that are synthesized by short-lived massive stars, excluding classical secondary nuclei like 13CO. Testing this idea, we tentatively detect the 13CO J=3-2 line at a level of 0.3 Jy km/s toward the Cloverleaf Quasar at redshift 2.5. This is the first observational evidence for 13CO at high redshift. The 12CO/13CO J=3-2 luminosity ratio is with at least 40 much higher than ratios observed in molecular clouds"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1004.2699","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:08:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eaWqNFUjcOzVpB/xj2a5COzMvVRMBWIO9AYwcG5n4Rfi+f2AO/fRoNNLpBgK6SaOzGnlQN3XZwB8Bv3DfBr6Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T15:27:53.250195Z"},"content_sha256":"9f57c77841efb218cd42c1ecf7788ae17f7a48dda860344f0862452fa6271021","schema_version":"1.0","event_id":"sha256:9f57c77841efb218cd42c1ecf7788ae17f7a48dda860344f0862452fa6271021"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JIIENLQYIC7OSDT4ODDPFKGO6H/bundle.json","state_url":"https://pith.science/pith/JIIENLQYIC7OSDT4ODDPFKGO6H/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JIIENLQYIC7OSDT4ODDPFKGO6H/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-29T15:27:53Z","links":{"resolver":"https://pith.science/pith/JIIENLQYIC7OSDT4ODDPFKGO6H","bundle":"https://pith.science/pith/JIIENLQYIC7OSDT4ODDPFKGO6H/bundle.json","state":"https://pith.science/pith/JIIENLQYIC7OSDT4ODDPFKGO6H/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JIIENLQYIC7OSDT4ODDPFKGO6H/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:JIIENLQYIC7OSDT4ODDPFKGO6H","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":"818194b8d91b703cffb954a1b067c54003d031bd4e3deac06f6072f0bd15079a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-04-15T19:45:52Z","title_canon_sha256":"20f5530bb5428385d24a4470ba5c0d922de1a7dd52101ea10e7104ba8114fbaa"},"schema_version":"1.0","source":{"id":"1004.2699","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1004.2699","created_at":"2026-05-18T02:08:05Z"},{"alias_kind":"arxiv_version","alias_value":"1004.2699v1","created_at":"2026-05-18T02:08:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1004.2699","created_at":"2026-05-18T02:08:05Z"},{"alias_kind":"pith_short_12","alias_value":"JIIENLQYIC7O","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_16","alias_value":"JIIENLQYIC7OSDT4","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_8","alias_value":"JIIENLQY","created_at":"2026-05-18T12:26:09Z"}],"graph_snapshots":[{"event_id":"sha256:9f57c77841efb218cd42c1ecf7788ae17f7a48dda860344f0862452fa6271021","target":"graph","created_at":"2026-05-18T02:08:05Z","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":"Observations of 12CO at high redshift indicate rapid metal enrichment in the nuclear regions of at least some galaxies in the early universe. However, the enrichment may be limited to nuclei that are synthesized by short-lived massive stars, excluding classical secondary nuclei like 13CO. Testing this idea, we tentatively detect the 13CO J=3-2 line at a level of 0.3 Jy km/s toward the Cloverleaf Quasar at redshift 2.5. This is the first observational evidence for 13CO at high redshift. The 12CO/13CO J=3-2 luminosity ratio is with at least 40 much higher than ratios observed in molecular clouds","authors_text":"A. Weiss, C. Henkel, D. Downes, D. Riechers, F. Walter","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-04-15T19:45:52Z","title":"Weak 13CO in the Cloverleaf Quasar: evidence for a young, early generation starburst"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1004.2699","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:e76ebde04b4c944c95477216d141f7f9a65ad661e751a87c8ce97d59ece14386","target":"record","created_at":"2026-05-18T02:08:05Z","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":"818194b8d91b703cffb954a1b067c54003d031bd4e3deac06f6072f0bd15079a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-04-15T19:45:52Z","title_canon_sha256":"20f5530bb5428385d24a4470ba5c0d922de1a7dd52101ea10e7104ba8114fbaa"},"schema_version":"1.0","source":{"id":"1004.2699","kind":"arxiv","version":1}},"canonical_sha256":"4a1046ae1840bee90e7c70c6f2a8cef1eea68e2fdff82d3b112ee7b9b68f1bf4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4a1046ae1840bee90e7c70c6f2a8cef1eea68e2fdff82d3b112ee7b9b68f1bf4","first_computed_at":"2026-05-18T02:08:05.076638Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:08:05.076638Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dcjQGBxyCwUY4Lpo0r695DeAyik7v0FHnN6cuUNw6P8vNr6q/La0bkGBJzmCJq/YYMOemO2MswHLHPQyfmQRDg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:08:05.077383Z","signed_message":"canonical_sha256_bytes"},"source_id":"1004.2699","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e76ebde04b4c944c95477216d141f7f9a65ad661e751a87c8ce97d59ece14386","sha256:9f57c77841efb218cd42c1ecf7788ae17f7a48dda860344f0862452fa6271021"],"state_sha256":"4b628c44f016226c3cc87547d6d81c5bc807d0f3bed7365226a1a57ad225d0f5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oSZl6M2xANhIaH2NcONYL6lJ3whAQsWDw6E0/k9tk7Pnl4in/ltX52ugVPEEZQHJlYrnzA8GL/oDEZNPN3QJCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-29T15:27:53.252894Z","bundle_sha256":"6f2236951526101db57926c640453d232b2ab4e7df7ef9f92a20ba63c7371109"}}