{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:YSFNQGACNPZMBJUSWL5AG6QTOM","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":"f6654135d8af4aaf363aa0a9676459575cdf3676d204b1c35d0996370b330584","cross_cats_sorted":["physics.atm-clus"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-12-03T04:23:44Z","title_canon_sha256":"e90f46b34fd60e938a966a8a5d12ef5023a18bde8fae0fd5d4c24f235ead81d4"},"schema_version":"1.0","source":{"id":"1512.00940","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.00940","created_at":"2026-05-18T01:25:23Z"},{"alias_kind":"arxiv_version","alias_value":"1512.00940v1","created_at":"2026-05-18T01:25:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.00940","created_at":"2026-05-18T01:25:23Z"},{"alias_kind":"pith_short_12","alias_value":"YSFNQGACNPZM","created_at":"2026-05-18T12:29:52Z"},{"alias_kind":"pith_short_16","alias_value":"YSFNQGACNPZMBJUS","created_at":"2026-05-18T12:29:52Z"},{"alias_kind":"pith_short_8","alias_value":"YSFNQGAC","created_at":"2026-05-18T12:29:52Z"}],"graph_snapshots":[{"event_id":"sha256:07206a0a8b8cca22b1c58cd28336de7984a48c6fb5e1a2366af8b58e98ca250d","target":"graph","created_at":"2026-05-18T01:25:23Z","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":"A gas-phase optical spectrum of a large polycyclic aromatic hydrocarbon (PAH) cation - C78H26 +- in the 410-610 nm range is presented. This large all-benzenoid PAH should be large enough to be stable with respect to photodissociation in the harsh conditions prevailing in the interstellar medium (ISM). The spectrum is obtained via multi-photon dissociation (MPD) spectroscopy of cationic C78H26 stored in the Fourier Transform Ion Cyclotron Resonance (FT-ICR) cell using the radiation from a mid-band optical parametric oscillator (OPO) laser. The experimental spectrum shows two main absorption pea","authors_text":"Anthony Bonnamy, Christine Joblin, Giacomo Mulas, Junfeng Zhen","cross_cats":["physics.atm-clus"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-12-03T04:23:44Z","title":"An optical spectrum of a large isolated gas-phase PAH cation: C78H26+"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.00940","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":"sha256:3bef81c9fee3ce50281787d136e7e27b721565c2590520e45d3a92be699f9d2c","target":"record","created_at":"2026-05-18T01:25:23Z","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":"f6654135d8af4aaf363aa0a9676459575cdf3676d204b1c35d0996370b330584","cross_cats_sorted":["physics.atm-clus"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-12-03T04:23:44Z","title_canon_sha256":"e90f46b34fd60e938a966a8a5d12ef5023a18bde8fae0fd5d4c24f235ead81d4"},"schema_version":"1.0","source":{"id":"1512.00940","kind":"arxiv","version":1}},"canonical_sha256":"c48ad818026bf2c0a692b2fa037a13730a1eadb244e18b2bd0e3b77483ff4a1d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c48ad818026bf2c0a692b2fa037a13730a1eadb244e18b2bd0e3b77483ff4a1d","first_computed_at":"2026-05-18T01:25:23.782072Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:25:23.782072Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QG4L2Tcr1iw17ePLzcYwhuHq+45hGULUh3FxaftFTAyoZnmKWYv1/ZVkSVm0xb9wwGfiNPaStAwfeeKVddV1Bg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:25:23.782456Z","signed_message":"canonical_sha256_bytes"},"source_id":"1512.00940","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3bef81c9fee3ce50281787d136e7e27b721565c2590520e45d3a92be699f9d2c","sha256:07206a0a8b8cca22b1c58cd28336de7984a48c6fb5e1a2366af8b58e98ca250d"],"state_sha256":"850b2b7e85a208f5bc5e8023a7e2437d9792d7ad93bf70124b36f10c2c4c4a2c"}