{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:MZSSEDHKOICFKP7O2ACVQAOM6S","short_pith_number":"pith:MZSSEDHK","canonical_record":{"source":{"id":"0809.4504","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-09-25T21:16:53Z","cross_cats_sorted":[],"title_canon_sha256":"a7e23ee0e8fa84d97c3af553c956fb04af31263ef655d8706b4a44a9379f4223","abstract_canon_sha256":"8974805de1d9564ce9e0fd57f1f55714f8caa801ab682e96ac6b6aad1bd0b4e6"},"schema_version":"1.0"},"canonical_sha256":"6665220cea7204553feed0055801ccf4aae4084b3187d3a2d81bf80311b9f848","source":{"kind":"arxiv","id":"0809.4504","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0809.4504","created_at":"2026-05-18T04:29:26Z"},{"alias_kind":"arxiv_version","alias_value":"0809.4504v1","created_at":"2026-05-18T04:29:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0809.4504","created_at":"2026-05-18T04:29:26Z"},{"alias_kind":"pith_short_12","alias_value":"MZSSEDHKOICF","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_16","alias_value":"MZSSEDHKOICFKP7O","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_8","alias_value":"MZSSEDHK","created_at":"2026-05-18T12:25:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:MZSSEDHKOICFKP7O2ACVQAOM6S","target":"record","payload":{"canonical_record":{"source":{"id":"0809.4504","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-09-25T21:16:53Z","cross_cats_sorted":[],"title_canon_sha256":"a7e23ee0e8fa84d97c3af553c956fb04af31263ef655d8706b4a44a9379f4223","abstract_canon_sha256":"8974805de1d9564ce9e0fd57f1f55714f8caa801ab682e96ac6b6aad1bd0b4e6"},"schema_version":"1.0"},"canonical_sha256":"6665220cea7204553feed0055801ccf4aae4084b3187d3a2d81bf80311b9f848","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:29:26.440739Z","signature_b64":"aKzcwxDT7U4Fpjr9FaUIA7hAfvyr2NdbzaugepnAb+FdrIPLVDfamZfzGjMeMr4jv2t60nIoZepHMJ+8cxoVBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6665220cea7204553feed0055801ccf4aae4084b3187d3a2d81bf80311b9f848","last_reissued_at":"2026-05-18T04:29:26.440337Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:29:26.440337Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0809.4504","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":"2026-05-18T04:29:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Q2kdDmHTqWUIC/DwynSkc27wcToHiL0dl4TAkA8LcXulmQNQQbL8o8I77dF6o3O8+0klyWFWSpP0iSDja6y4DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-18T20:21:00.382522Z"},"content_sha256":"00a53172def5b8cedf8ef1c3cb7d9ff6188530da2ed2857bcb91ab981ebe5417","schema_version":"1.0","event_id":"sha256:00a53172def5b8cedf8ef1c3cb7d9ff6188530da2ed2857bcb91ab981ebe5417"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:MZSSEDHKOICFKP7O2ACVQAOM6S","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Molecular cloud chemistry and the importance of dielectronic recombination","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"D. W. Savin, E. Roueff, H. Kreckel, P. Bryans, V. Wakelam","submitted_at":"2008-09-25T21:16:53Z","abstract_excerpt":"Dielectronic recombination (DR) of singly charged ions is a reaction pathway that is commonly neglected in chemical models of molecular clouds. In this study we include state-of-the-art DR data for He$^+$, C$^+$, N$^+$, O$^+$, Na$^+$, and Mg$^+$ in chemical models used to simulate dense molecular clouds, protostars, and diffuse molecular clouds. We also update the radiative recombination (RR) rate coefficients for H$^+$, He$^+$, C$^+$, N$^+$, O$^+$, Na$^+$, and Mg$^+$ to the current state-of-the-art values. The new RR data has little effect on the models. However, the inclusion of DR results i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0809.4504","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":"2026-05-18T04:29:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cTaNOuTRHAkpP0bs78zvrovekT7CcyQyGLA3I4Bbr9+etXdr6vXMepaSvW7QxmfmCJ3TNRc0H0sxNNc7HrDiCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-18T20:21:00.383195Z"},"content_sha256":"ea0191ca96225bd220de264b7eb9dd97175f3c95957a5c0967caae8a245d52b4","schema_version":"1.0","event_id":"sha256:ea0191ca96225bd220de264b7eb9dd97175f3c95957a5c0967caae8a245d52b4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MZSSEDHKOICFKP7O2ACVQAOM6S/bundle.json","state_url":"https://pith.science/pith/MZSSEDHKOICFKP7O2ACVQAOM6S/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MZSSEDHKOICFKP7O2ACVQAOM6S/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":"2026-05-18T20:21:00Z","links":{"resolver":"https://pith.science/pith/MZSSEDHKOICFKP7O2ACVQAOM6S","bundle":"https://pith.science/pith/MZSSEDHKOICFKP7O2ACVQAOM6S/bundle.json","state":"https://pith.science/pith/MZSSEDHKOICFKP7O2ACVQAOM6S/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MZSSEDHKOICFKP7O2ACVQAOM6S/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:MZSSEDHKOICFKP7O2ACVQAOM6S","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":"8974805de1d9564ce9e0fd57f1f55714f8caa801ab682e96ac6b6aad1bd0b4e6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-09-25T21:16:53Z","title_canon_sha256":"a7e23ee0e8fa84d97c3af553c956fb04af31263ef655d8706b4a44a9379f4223"},"schema_version":"1.0","source":{"id":"0809.4504","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0809.4504","created_at":"2026-05-18T04:29:26Z"},{"alias_kind":"arxiv_version","alias_value":"0809.4504v1","created_at":"2026-05-18T04:29:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0809.4504","created_at":"2026-05-18T04:29:26Z"},{"alias_kind":"pith_short_12","alias_value":"MZSSEDHKOICF","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_16","alias_value":"MZSSEDHKOICFKP7O","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_8","alias_value":"MZSSEDHK","created_at":"2026-05-18T12:25:57Z"}],"graph_snapshots":[{"event_id":"sha256:ea0191ca96225bd220de264b7eb9dd97175f3c95957a5c0967caae8a245d52b4","target":"graph","created_at":"2026-05-18T04:29:26Z","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":"Dielectronic recombination (DR) of singly charged ions is a reaction pathway that is commonly neglected in chemical models of molecular clouds. In this study we include state-of-the-art DR data for He$^+$, C$^+$, N$^+$, O$^+$, Na$^+$, and Mg$^+$ in chemical models used to simulate dense molecular clouds, protostars, and diffuse molecular clouds. We also update the radiative recombination (RR) rate coefficients for H$^+$, He$^+$, C$^+$, N$^+$, O$^+$, Na$^+$, and Mg$^+$ to the current state-of-the-art values. The new RR data has little effect on the models. However, the inclusion of DR results i","authors_text":"D. W. Savin, E. Roueff, H. Kreckel, P. Bryans, V. Wakelam","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-09-25T21:16:53Z","title":"Molecular cloud chemistry and the importance of dielectronic recombination"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0809.4504","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":"sha256:00a53172def5b8cedf8ef1c3cb7d9ff6188530da2ed2857bcb91ab981ebe5417","target":"record","created_at":"2026-05-18T04:29:26Z","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":"8974805de1d9564ce9e0fd57f1f55714f8caa801ab682e96ac6b6aad1bd0b4e6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-09-25T21:16:53Z","title_canon_sha256":"a7e23ee0e8fa84d97c3af553c956fb04af31263ef655d8706b4a44a9379f4223"},"schema_version":"1.0","source":{"id":"0809.4504","kind":"arxiv","version":1}},"canonical_sha256":"6665220cea7204553feed0055801ccf4aae4084b3187d3a2d81bf80311b9f848","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6665220cea7204553feed0055801ccf4aae4084b3187d3a2d81bf80311b9f848","first_computed_at":"2026-05-18T04:29:26.440337Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:29:26.440337Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aKzcwxDT7U4Fpjr9FaUIA7hAfvyr2NdbzaugepnAb+FdrIPLVDfamZfzGjMeMr4jv2t60nIoZepHMJ+8cxoVBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:29:26.440739Z","signed_message":"canonical_sha256_bytes"},"source_id":"0809.4504","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:00a53172def5b8cedf8ef1c3cb7d9ff6188530da2ed2857bcb91ab981ebe5417","sha256:ea0191ca96225bd220de264b7eb9dd97175f3c95957a5c0967caae8a245d52b4"],"state_sha256":"fa032b5db9e4380a603a4e7b4a85c1e1f95e09149632cd9af3e8544e0525b2ed"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VFIOzFW+5Rd7cSj3GgNVouluOxnf718DgJ1Bb6D5ra6mrEKmMgsEfdbCjbd5hcrrQY2HepeV82hpXYuskOsuAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-18T20:21:00.385352Z","bundle_sha256":"7d1fcf9e837507ff702a793a7c673d19139a6e3b9b3d0ab3320d2117f4f8779d"}}