{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:ZGFBMT3XF6QSDPOB23HTGBO34F","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":"8f113b5747dc5a723d3496299eb862bf0c8fff3adfe97f95ea67a808a7f4588c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-02-18T08:06:06Z","title_canon_sha256":"42bd807bbd3056c65465e1ecc9d9b3f561d46bb765dae621d0685821388b6047"},"schema_version":"1.0","source":{"id":"1102.3775","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1102.3775","created_at":"2026-05-18T02:03:09Z"},{"alias_kind":"arxiv_version","alias_value":"1102.3775v1","created_at":"2026-05-18T02:03:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1102.3775","created_at":"2026-05-18T02:03:09Z"},{"alias_kind":"pith_short_12","alias_value":"ZGFBMT3XF6QS","created_at":"2026-05-18T12:26:47Z"},{"alias_kind":"pith_short_16","alias_value":"ZGFBMT3XF6QSDPOB","created_at":"2026-05-18T12:26:47Z"},{"alias_kind":"pith_short_8","alias_value":"ZGFBMT3X","created_at":"2026-05-18T12:26:47Z"}],"graph_snapshots":[{"event_id":"sha256:35ce700f361ec2e5306d2ed3ae7244d77fafc81f74c44dc6521f4c0945272a55","target":"graph","created_at":"2026-05-18T02:03:09Z","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":"We present recent UV laboratory spectra of various polycyclic aromatic hydrocarbons (PAHs) and explore the potential of these molecules as carriers of the DIBs. From a detailed comparison of gas-phase and Ne-matrix absorption spectra of anthracene, phenanthrene, pyrene, 2,3-benzofluorene, benzo[ghi]perylene, and hexabenzocoronene with new interstellar spectra, we infer upper limits in the abundance of these PAHs in the interstellar medium. Upper limits in the column densities of anthracene of $0.8 - 2.8 \\times 10^{12}$\\ cm$^{-2}$ and of pyrene and 2,3-benzofluorene ranging from $2 - 8 \\times 1","authors_text":"F. Huisken, G. Rouille, M. Steglich, R. Gredel, Th. Henning, Y. Carpentier","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-02-18T08:06:06Z","title":"Abundances of PAHs in the ISM: Confronting Observations with Experimental Results"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1102.3775","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:e274f9b3ca8e628d3305271d607aa325890552d493faccc0eb38fd163cef3e21","target":"record","created_at":"2026-05-18T02:03:09Z","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":"8f113b5747dc5a723d3496299eb862bf0c8fff3adfe97f95ea67a808a7f4588c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-02-18T08:06:06Z","title_canon_sha256":"42bd807bbd3056c65465e1ecc9d9b3f561d46bb765dae621d0685821388b6047"},"schema_version":"1.0","source":{"id":"1102.3775","kind":"arxiv","version":1}},"canonical_sha256":"c98a164f772fa121bdc1d6cf3305dbe1462411dd689ec2fb04e6da8109f18dc8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c98a164f772fa121bdc1d6cf3305dbe1462411dd689ec2fb04e6da8109f18dc8","first_computed_at":"2026-05-18T02:03:09.543266Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:03:09.543266Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"oES9N+07y7l1wUGDS1M95kdgPCZGPOgVjffzG9KMthRmj2qw7aGiPoOgPk2HhUeeua6ujnP8kxAwXCrZIaD7Cw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:03:09.543881Z","signed_message":"canonical_sha256_bytes"},"source_id":"1102.3775","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e274f9b3ca8e628d3305271d607aa325890552d493faccc0eb38fd163cef3e21","sha256:35ce700f361ec2e5306d2ed3ae7244d77fafc81f74c44dc6521f4c0945272a55"],"state_sha256":"6261d3f3fe1dedb99109b66c04f03dca9b803ea9f9a9a9c0c25fd81762926092"}