{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:FOTTGDVQEHYDV55UFYCNWWOU4S","short_pith_number":"pith:FOTTGDVQ","canonical_record":{"source":{"id":"1706.01832","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.chem-ph","submitted_at":"2017-06-06T16:08:43Z","cross_cats_sorted":[],"title_canon_sha256":"25e9ef6b98a00ec57cc057419e5b4fd7967529013a8ab9fc3841f952c6446cd5","abstract_canon_sha256":"f9f6f7148c5c1dcee95a08203cba9e27c35529380fce2d5ef5724351309b5d52"},"schema_version":"1.0"},"canonical_sha256":"2ba7330eb021f03af7b42e04db59d4e4865f9a35486ab51c81cbde975d96a49d","source":{"kind":"arxiv","id":"1706.01832","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1706.01832","created_at":"2026-05-18T00:42:55Z"},{"alias_kind":"arxiv_version","alias_value":"1706.01832v1","created_at":"2026-05-18T00:42:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1706.01832","created_at":"2026-05-18T00:42:55Z"},{"alias_kind":"pith_short_12","alias_value":"FOTTGDVQEHYD","created_at":"2026-05-18T12:31:15Z"},{"alias_kind":"pith_short_16","alias_value":"FOTTGDVQEHYDV55U","created_at":"2026-05-18T12:31:15Z"},{"alias_kind":"pith_short_8","alias_value":"FOTTGDVQ","created_at":"2026-05-18T12:31:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:FOTTGDVQEHYDV55UFYCNWWOU4S","target":"record","payload":{"canonical_record":{"source":{"id":"1706.01832","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.chem-ph","submitted_at":"2017-06-06T16:08:43Z","cross_cats_sorted":[],"title_canon_sha256":"25e9ef6b98a00ec57cc057419e5b4fd7967529013a8ab9fc3841f952c6446cd5","abstract_canon_sha256":"f9f6f7148c5c1dcee95a08203cba9e27c35529380fce2d5ef5724351309b5d52"},"schema_version":"1.0"},"canonical_sha256":"2ba7330eb021f03af7b42e04db59d4e4865f9a35486ab51c81cbde975d96a49d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:42:55.822592Z","signature_b64":"hT1MoOw+dIKLsgv6p6YkPxrajfebPuH2PMciZkqXSWoVkg27aFwKVyOJOt8qxEEmm0L8Cov/K/2d9tIJkgF6AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2ba7330eb021f03af7b42e04db59d4e4865f9a35486ab51c81cbde975d96a49d","last_reissued_at":"2026-05-18T00:42:55.821855Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:42:55.821855Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1706.01832","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":"2026-05-18T00:42:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lPwhvVtaluFyB7BUx/iz5cWgR3JoIh0ffeSaT4oFvgo1ZigZlvENIeY7IChDwv/Zx626PZiHkZBfvw68D/TLCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T15:49:45.324722Z"},"content_sha256":"ebe8017901bc4666868e73a0d686e1633524638a681a003f8c18ad01d078e237","schema_version":"1.0","event_id":"sha256:ebe8017901bc4666868e73a0d686e1633524638a681a003f8c18ad01d078e237"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:FOTTGDVQEHYDV55UFYCNWWOU4S","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Rapid Compression Study of the Butanol Isomers at Elevated Pressure","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.chem-ph","authors_text":"Bryan W. Weber, Chih-Jen Sung","submitted_at":"2017-06-06T16:08:43Z","abstract_excerpt":"Investigation of the autoignition delay of the butanol isomers has been performed at elevated pressure of 15 bar and low to intermediate temperatures of 725-870 K. Stoichiometric mixtures made in nitrogen/oxygen air were studied. For the temperature and pressure conditions in this study, no NTC or two-stage ignition behavior were observed. The reactivity of the isomers of butanol, in terms of inverse ignition delay, was ranked as n-butanol > sec-butanol ~ iso-butanol > tert-butanol. Predictions of the ignition delay by several kinetic mechanisms available in the literature generally over-predi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1706.01832","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":"2026-05-18T00:42:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mV2uJeHgcwtsVyc+QLOlXkg5T00ruuhcCDfyM/HRYePv2YytCsg/8iyv+Z1oWBP/XCBa/jiexQ2TLUCU/eBNCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T15:49:45.325278Z"},"content_sha256":"680e797ad35a57c86ba0f168cba1dc635df5e08ef30c48c5b4ab02da3de7be58","schema_version":"1.0","event_id":"sha256:680e797ad35a57c86ba0f168cba1dc635df5e08ef30c48c5b4ab02da3de7be58"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FOTTGDVQEHYDV55UFYCNWWOU4S/bundle.json","state_url":"https://pith.science/pith/FOTTGDVQEHYDV55UFYCNWWOU4S/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FOTTGDVQEHYDV55UFYCNWWOU4S/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":"2026-05-29T15:49:45Z","links":{"resolver":"https://pith.science/pith/FOTTGDVQEHYDV55UFYCNWWOU4S","bundle":"https://pith.science/pith/FOTTGDVQEHYDV55UFYCNWWOU4S/bundle.json","state":"https://pith.science/pith/FOTTGDVQEHYDV55UFYCNWWOU4S/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FOTTGDVQEHYDV55UFYCNWWOU4S/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:FOTTGDVQEHYDV55UFYCNWWOU4S","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":"f9f6f7148c5c1dcee95a08203cba9e27c35529380fce2d5ef5724351309b5d52","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.chem-ph","submitted_at":"2017-06-06T16:08:43Z","title_canon_sha256":"25e9ef6b98a00ec57cc057419e5b4fd7967529013a8ab9fc3841f952c6446cd5"},"schema_version":"1.0","source":{"id":"1706.01832","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1706.01832","created_at":"2026-05-18T00:42:55Z"},{"alias_kind":"arxiv_version","alias_value":"1706.01832v1","created_at":"2026-05-18T00:42:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1706.01832","created_at":"2026-05-18T00:42:55Z"},{"alias_kind":"pith_short_12","alias_value":"FOTTGDVQEHYD","created_at":"2026-05-18T12:31:15Z"},{"alias_kind":"pith_short_16","alias_value":"FOTTGDVQEHYDV55U","created_at":"2026-05-18T12:31:15Z"},{"alias_kind":"pith_short_8","alias_value":"FOTTGDVQ","created_at":"2026-05-18T12:31:15Z"}],"graph_snapshots":[{"event_id":"sha256:680e797ad35a57c86ba0f168cba1dc635df5e08ef30c48c5b4ab02da3de7be58","target":"graph","created_at":"2026-05-18T00:42:55Z","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":"Investigation of the autoignition delay of the butanol isomers has been performed at elevated pressure of 15 bar and low to intermediate temperatures of 725-870 K. Stoichiometric mixtures made in nitrogen/oxygen air were studied. For the temperature and pressure conditions in this study, no NTC or two-stage ignition behavior were observed. The reactivity of the isomers of butanol, in terms of inverse ignition delay, was ranked as n-butanol > sec-butanol ~ iso-butanol > tert-butanol. Predictions of the ignition delay by several kinetic mechanisms available in the literature generally over-predi","authors_text":"Bryan W. Weber, Chih-Jen Sung","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.chem-ph","submitted_at":"2017-06-06T16:08:43Z","title":"A Rapid Compression Study of the Butanol Isomers at Elevated Pressure"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1706.01832","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:ebe8017901bc4666868e73a0d686e1633524638a681a003f8c18ad01d078e237","target":"record","created_at":"2026-05-18T00:42:55Z","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":"f9f6f7148c5c1dcee95a08203cba9e27c35529380fce2d5ef5724351309b5d52","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.chem-ph","submitted_at":"2017-06-06T16:08:43Z","title_canon_sha256":"25e9ef6b98a00ec57cc057419e5b4fd7967529013a8ab9fc3841f952c6446cd5"},"schema_version":"1.0","source":{"id":"1706.01832","kind":"arxiv","version":1}},"canonical_sha256":"2ba7330eb021f03af7b42e04db59d4e4865f9a35486ab51c81cbde975d96a49d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2ba7330eb021f03af7b42e04db59d4e4865f9a35486ab51c81cbde975d96a49d","first_computed_at":"2026-05-18T00:42:55.821855Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:42:55.821855Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hT1MoOw+dIKLsgv6p6YkPxrajfebPuH2PMciZkqXSWoVkg27aFwKVyOJOt8qxEEmm0L8Cov/K/2d9tIJkgF6AQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:42:55.822592Z","signed_message":"canonical_sha256_bytes"},"source_id":"1706.01832","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ebe8017901bc4666868e73a0d686e1633524638a681a003f8c18ad01d078e237","sha256:680e797ad35a57c86ba0f168cba1dc635df5e08ef30c48c5b4ab02da3de7be58"],"state_sha256":"294076b21b4c20f3f7faa3df5ac0340d9514c4aba5572b208081853c65513fb4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BOolxhPgwbjHd3LIeBwiKtKSmcBMPDTLSkZVtFnEFP4gJjdVSSJqNQ6XonFLcIucXij1/aiXHKdzCmB2V/KwAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-29T15:49:45.327865Z","bundle_sha256":"2d8b5ff2460858a44e1acec13c6d28fc7bfbb14a90dbb73ca296b6fc78fcb30c"}}