{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:46XBRO75PEAW3MS5SFM6S7THD5","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":"4a4daf22721147c52ccb0d7f11264dc9b588de8121ad134c5355185f3cd8451f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2019-04-05T07:14:04Z","title_canon_sha256":"ed93111bc0e8b8bebe0207e20c50cd4900286390778c1ac78a742bee63276b45"},"schema_version":"1.0","source":{"id":"1904.02899","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.02899","created_at":"2026-05-17T23:43:02Z"},{"alias_kind":"arxiv_version","alias_value":"1904.02899v1","created_at":"2026-05-17T23:43:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.02899","created_at":"2026-05-17T23:43:02Z"},{"alias_kind":"pith_short_12","alias_value":"46XBRO75PEAW","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_16","alias_value":"46XBRO75PEAW3MS5","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_8","alias_value":"46XBRO75","created_at":"2026-05-18T12:33:10Z"}],"graph_snapshots":[{"event_id":"sha256:b81d8ea77c1ab79b543543dae7386d94ad83bc708bc0db204c267f6c29f598ba","target":"graph","created_at":"2026-05-17T23:43:02Z","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":"Quantifying the effect of anharmonicity on the infrared spectrum of large molecules such as polycyclic aromatic hydrocarbons (PAHs) at high temperature is the focus of a number of theoretical and experimental studies, many of them motivated by astrophysical applications. We recorded the infrared spectrum of pyrene C16H10 microcrystals embedded in a KBr pellet over a wide range of temperature (14 -723 K) and studied the evolution of band positions, widths and integrated intensities with temperature. We identified jumps for some of the spectral characteristics of some bands in the [423- 473]K ra","authors_text":"Christine Joblin (IRAP), Giacomo Mulas (OAC), Karine Demyk (IRAP), Shubhadip Chakraborty (IRAP)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2019-04-05T07:14:04Z","title":"Experimental Approach to the Study of Anharmonicity in the Infrared Spectrum of Pyrene from 14 to 723 K"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.02899","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":"sha256:4503e4a0004f253aa694ccef50325d551e7ff43729e456dbfd64d72f479cae8b","target":"record","created_at":"2026-05-17T23:43:02Z","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":"4a4daf22721147c52ccb0d7f11264dc9b588de8121ad134c5355185f3cd8451f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2019-04-05T07:14:04Z","title_canon_sha256":"ed93111bc0e8b8bebe0207e20c50cd4900286390778c1ac78a742bee63276b45"},"schema_version":"1.0","source":{"id":"1904.02899","kind":"arxiv","version":1}},"canonical_sha256":"e7ae18bbfd79016db25d9159e97e671f749197d292315cb0963611de80454263","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e7ae18bbfd79016db25d9159e97e671f749197d292315cb0963611de80454263","first_computed_at":"2026-05-17T23:43:02.691726Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:43:02.691726Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZDlPKZp5eikhuzBvfQ8ChimSmU7p+WXwyd8cG9Hgfzi70V370yI1PqVuKmQpempO5NNpDfDE1zVB4kZCSyqtCg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:43:02.692162Z","signed_message":"canonical_sha256_bytes"},"source_id":"1904.02899","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4503e4a0004f253aa694ccef50325d551e7ff43729e456dbfd64d72f479cae8b","sha256:b81d8ea77c1ab79b543543dae7386d94ad83bc708bc0db204c267f6c29f598ba"],"state_sha256":"987f74d63e15e7e5c3e3efd068fdca212c28fcd167b7a23d83ca906c313e40a3"}