{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:Y3BMFOA4AQLEZKCSN3QBW6EFTX","short_pith_number":"pith:Y3BMFOA4","canonical_record":{"source":{"id":"1902.05574","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-02-14T19:27:08Z","cross_cats_sorted":["physics.ao-ph","physics.chem-ph"],"title_canon_sha256":"27ed906381de5e43bc58ffbbcbad13cfea989cc7c21a36a6c247840604a0a93f","abstract_canon_sha256":"408af4c3fb89adf132d76e3dd2bcbaf87a2c2183e8cc142a02711a2b8e3da390"},"schema_version":"1.0"},"canonical_sha256":"c6c2c2b81c04164ca8526ee01b78859df26cf8156afb260fa0ac7b8ee167ddf5","source":{"kind":"arxiv","id":"1902.05574","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.05574","created_at":"2026-05-17T23:51:41Z"},{"alias_kind":"arxiv_version","alias_value":"1902.05574v1","created_at":"2026-05-17T23:51:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.05574","created_at":"2026-05-17T23:51:41Z"},{"alias_kind":"pith_short_12","alias_value":"Y3BMFOA4AQLE","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_16","alias_value":"Y3BMFOA4AQLEZKCS","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_8","alias_value":"Y3BMFOA4","created_at":"2026-05-18T12:33:33Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:Y3BMFOA4AQLEZKCSN3QBW6EFTX","target":"record","payload":{"canonical_record":{"source":{"id":"1902.05574","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-02-14T19:27:08Z","cross_cats_sorted":["physics.ao-ph","physics.chem-ph"],"title_canon_sha256":"27ed906381de5e43bc58ffbbcbad13cfea989cc7c21a36a6c247840604a0a93f","abstract_canon_sha256":"408af4c3fb89adf132d76e3dd2bcbaf87a2c2183e8cc142a02711a2b8e3da390"},"schema_version":"1.0"},"canonical_sha256":"c6c2c2b81c04164ca8526ee01b78859df26cf8156afb260fa0ac7b8ee167ddf5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:51:41.724426Z","signature_b64":"VpzO151ht08sprCsyhWurcxTrk1585w3THGSeCFC4kqKY6n61DVBO765pWfO3UAg3TVSG4x25wQZwOFhiO2jDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c6c2c2b81c04164ca8526ee01b78859df26cf8156afb260fa0ac7b8ee167ddf5","last_reissued_at":"2026-05-17T23:51:41.723875Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:51:41.723875Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1902.05574","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":"2026-05-17T23:51:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/PltrEY+O2BxOaj91DndZLXDSN2L2oWK9CiSSdO5LEuH/7okONZlGlAmUtgbJ765ovhOdWkudni3LELD/Nx1Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T16:52:38.989762Z"},"content_sha256":"b3da7f0257a30ae34546356e67393b192e96af3e38c8429a3c8bc6b6f4f481b6","schema_version":"1.0","event_id":"sha256:b3da7f0257a30ae34546356e67393b192e96af3e38c8429a3c8bc6b6f4f481b6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:Y3BMFOA4AQLEZKCSN3QBW6EFTX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Consistent Reduced Network for HCN Chemistry in Early Earth and Titan Atmospheres: Quantum Calculations of Reaction Rate Coefficients","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.ao-ph","physics.chem-ph"],"primary_cat":"astro-ph.EP","authors_text":"Ben K. D. Pearce, Paul W. Ayers, Ralph E. Pudritz","submitted_at":"2019-02-14T19:27:08Z","abstract_excerpt":"HCN is a key ingredient for synthesizing biomolecules such as nucleobases and amino acids. We calculate 42 reaction rate coefficients directly involved with or in competition with the production of HCN in the early Earth or Titan atmospheres. These reactions are driven by methane and nitrogen radicals produced via UV photodissociation or lightning. For every reaction in this network, we calculate rate coefficients at 298 K using canonical variational transition state theory (CVT) paired with computational quantum chemistry simulations at the BHandHLYP/augcc-pVDZ level of theory. We also calcul"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.05574","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":"2026-05-17T23:51:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DnV97O+HBp7O5f6UoKIQ1l8SLiuLtdyjFxg8bxkO8q9IjTxZo5Ki5nAUDCxOBLyy2pyAETGY9Eck7ugDdf5fCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T16:52:38.990103Z"},"content_sha256":"785399a4fd2e5a64f0bbca1b30fe1a412f1204c6fc3c02efbc38c635b34fbf4e","schema_version":"1.0","event_id":"sha256:785399a4fd2e5a64f0bbca1b30fe1a412f1204c6fc3c02efbc38c635b34fbf4e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Y3BMFOA4AQLEZKCSN3QBW6EFTX/bundle.json","state_url":"https://pith.science/pith/Y3BMFOA4AQLEZKCSN3QBW6EFTX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Y3BMFOA4AQLEZKCSN3QBW6EFTX/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":"2026-06-27T16:52:38Z","links":{"resolver":"https://pith.science/pith/Y3BMFOA4AQLEZKCSN3QBW6EFTX","bundle":"https://pith.science/pith/Y3BMFOA4AQLEZKCSN3QBW6EFTX/bundle.json","state":"https://pith.science/pith/Y3BMFOA4AQLEZKCSN3QBW6EFTX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Y3BMFOA4AQLEZKCSN3QBW6EFTX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:Y3BMFOA4AQLEZKCSN3QBW6EFTX","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":"408af4c3fb89adf132d76e3dd2bcbaf87a2c2183e8cc142a02711a2b8e3da390","cross_cats_sorted":["physics.ao-ph","physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-02-14T19:27:08Z","title_canon_sha256":"27ed906381de5e43bc58ffbbcbad13cfea989cc7c21a36a6c247840604a0a93f"},"schema_version":"1.0","source":{"id":"1902.05574","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.05574","created_at":"2026-05-17T23:51:41Z"},{"alias_kind":"arxiv_version","alias_value":"1902.05574v1","created_at":"2026-05-17T23:51:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.05574","created_at":"2026-05-17T23:51:41Z"},{"alias_kind":"pith_short_12","alias_value":"Y3BMFOA4AQLE","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_16","alias_value":"Y3BMFOA4AQLEZKCS","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_8","alias_value":"Y3BMFOA4","created_at":"2026-05-18T12:33:33Z"}],"graph_snapshots":[{"event_id":"sha256:785399a4fd2e5a64f0bbca1b30fe1a412f1204c6fc3c02efbc38c635b34fbf4e","target":"graph","created_at":"2026-05-17T23:51:41Z","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":"HCN is a key ingredient for synthesizing biomolecules such as nucleobases and amino acids. We calculate 42 reaction rate coefficients directly involved with or in competition with the production of HCN in the early Earth or Titan atmospheres. These reactions are driven by methane and nitrogen radicals produced via UV photodissociation or lightning. For every reaction in this network, we calculate rate coefficients at 298 K using canonical variational transition state theory (CVT) paired with computational quantum chemistry simulations at the BHandHLYP/augcc-pVDZ level of theory. We also calcul","authors_text":"Ben K. D. Pearce, Paul W. Ayers, Ralph E. Pudritz","cross_cats":["physics.ao-ph","physics.chem-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-02-14T19:27:08Z","title":"A Consistent Reduced Network for HCN Chemistry in Early Earth and Titan Atmospheres: Quantum Calculations of Reaction Rate Coefficients"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.05574","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:b3da7f0257a30ae34546356e67393b192e96af3e38c8429a3c8bc6b6f4f481b6","target":"record","created_at":"2026-05-17T23:51:41Z","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":"408af4c3fb89adf132d76e3dd2bcbaf87a2c2183e8cc142a02711a2b8e3da390","cross_cats_sorted":["physics.ao-ph","physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-02-14T19:27:08Z","title_canon_sha256":"27ed906381de5e43bc58ffbbcbad13cfea989cc7c21a36a6c247840604a0a93f"},"schema_version":"1.0","source":{"id":"1902.05574","kind":"arxiv","version":1}},"canonical_sha256":"c6c2c2b81c04164ca8526ee01b78859df26cf8156afb260fa0ac7b8ee167ddf5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c6c2c2b81c04164ca8526ee01b78859df26cf8156afb260fa0ac7b8ee167ddf5","first_computed_at":"2026-05-17T23:51:41.723875Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:51:41.723875Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VpzO151ht08sprCsyhWurcxTrk1585w3THGSeCFC4kqKY6n61DVBO765pWfO3UAg3TVSG4x25wQZwOFhiO2jDA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:51:41.724426Z","signed_message":"canonical_sha256_bytes"},"source_id":"1902.05574","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b3da7f0257a30ae34546356e67393b192e96af3e38c8429a3c8bc6b6f4f481b6","sha256:785399a4fd2e5a64f0bbca1b30fe1a412f1204c6fc3c02efbc38c635b34fbf4e"],"state_sha256":"0063df48e15af40e98a80686bae5dc56e950b5fb50627f8f0057a0c768558197"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GKs3IbA8ppDZEy28ZaDdL8r2hHctqdVYMjxCItRx8WVFTkeFoHPcgzbDOj/BOhR/seCYW+KWfYweDirB08LTAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-27T16:52:38.992040Z","bundle_sha256":"a267fd271de58e725c0cd361448085d3cd7832fded7a423e5b3b04ff00aae046"}}