{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2010:AG7GOQMUX25IY6MNKPHRX5HJG3","short_pith_number":"pith:AG7GOQMU","schema_version":"1.0","canonical_sha256":"01be674194beba8c798d53cf1bf4e936c33bf13e0d2e808a3b0b1921ff2a260c","source":{"kind":"arxiv","id":"1004.1967","version":1},"attestation_state":"computed","paper":{"title":"When an old star smolders: On the detection of hydrocarbon emission from S-type AGB stars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. A. Zijlstra, B. Acke, G. C. Sloan, H. Van Winckel, J.A.D.L. Blommaert, K. Smolders, L. Decin, P. Neyskens, S. Hony, S. Van Eck, T. Verhoelst","submitted_at":"2010-04-12T14:19:23Z","abstract_excerpt":"Polycyclic aromatic hydrocarbons (PAHs) produce characteristic infrared emission bands that have been observed in a wide range of astrophysical environments, where carbonaceous material is subjected to ultraviolet (UV) radiation. Although PAHs are expected to form in carbon-rich AGB stars, they have up to now only been observed in binary systems where a hot companion provides a hard radiation field. In this letter, we present low-resolution infrared spectra of four S-type AGB stars, selected from a sample of 90 S-type AGB stars observed with the infrared spectrograph aboard the Spitzer satelli"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1004.1967","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-04-12T14:19:23Z","cross_cats_sorted":[],"title_canon_sha256":"610625315cf2d49317202357a55dd6fbec45e3952ea119cfa565e90b3333cda0","abstract_canon_sha256":"fe171ab1b2436aa6da9f5c98a031b766a771ae922bc0b06530641ce18e1f3b5c"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:08:06.669172Z","signature_b64":"1Ug+CXnOM4mX5c+6CFVGmd8eUuxeI/WTlYd23eHBinzbYMWVmdH+ZNlkgn5BRHCDacjop+6oamkoT0o1jaeGAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"01be674194beba8c798d53cf1bf4e936c33bf13e0d2e808a3b0b1921ff2a260c","last_reissued_at":"2026-05-18T02:08:06.668275Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:08:06.668275Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"When an old star smolders: On the detection of hydrocarbon emission from S-type AGB stars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. A. Zijlstra, B. Acke, G. C. Sloan, H. Van Winckel, J.A.D.L. Blommaert, K. Smolders, L. Decin, P. Neyskens, S. Hony, S. Van Eck, T. Verhoelst","submitted_at":"2010-04-12T14:19:23Z","abstract_excerpt":"Polycyclic aromatic hydrocarbons (PAHs) produce characteristic infrared emission bands that have been observed in a wide range of astrophysical environments, where carbonaceous material is subjected to ultraviolet (UV) radiation. Although PAHs are expected to form in carbon-rich AGB stars, they have up to now only been observed in binary systems where a hot companion provides a hard radiation field. In this letter, we present low-resolution infrared spectra of four S-type AGB stars, selected from a sample of 90 S-type AGB stars observed with the infrared spectrograph aboard the Spitzer satelli"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1004.1967","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1004.1967","created_at":"2026-05-18T02:08:06.668431+00:00"},{"alias_kind":"arxiv_version","alias_value":"1004.1967v1","created_at":"2026-05-18T02:08:06.668431+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1004.1967","created_at":"2026-05-18T02:08:06.668431+00:00"},{"alias_kind":"pith_short_12","alias_value":"AG7GOQMUX25I","created_at":"2026-05-18T12:26:05.355336+00:00"},{"alias_kind":"pith_short_16","alias_value":"AG7GOQMUX25IY6MN","created_at":"2026-05-18T12:26:05.355336+00:00"},{"alias_kind":"pith_short_8","alias_value":"AG7GOQMU","created_at":"2026-05-18T12:26:05.355336+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/AG7GOQMUX25IY6MNKPHRX5HJG3","json":"https://pith.science/pith/AG7GOQMUX25IY6MNKPHRX5HJG3.json","graph_json":"https://pith.science/api/pith-number/AG7GOQMUX25IY6MNKPHRX5HJG3/graph.json","events_json":"https://pith.science/api/pith-number/AG7GOQMUX25IY6MNKPHRX5HJG3/events.json","paper":"https://pith.science/paper/AG7GOQMU"},"agent_actions":{"view_html":"https://pith.science/pith/AG7GOQMUX25IY6MNKPHRX5HJG3","download_json":"https://pith.science/pith/AG7GOQMUX25IY6MNKPHRX5HJG3.json","view_paper":"https://pith.science/paper/AG7GOQMU","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1004.1967&json=true","fetch_graph":"https://pith.science/api/pith-number/AG7GOQMUX25IY6MNKPHRX5HJG3/graph.json","fetch_events":"https://pith.science/api/pith-number/AG7GOQMUX25IY6MNKPHRX5HJG3/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/AG7GOQMUX25IY6MNKPHRX5HJG3/action/timestamp_anchor","attest_storage":"https://pith.science/pith/AG7GOQMUX25IY6MNKPHRX5HJG3/action/storage_attestation","attest_author":"https://pith.science/pith/AG7GOQMUX25IY6MNKPHRX5HJG3/action/author_attestation","sign_citation":"https://pith.science/pith/AG7GOQMUX25IY6MNKPHRX5HJG3/action/citation_signature","submit_replication":"https://pith.science/pith/AG7GOQMUX25IY6MNKPHRX5HJG3/action/replication_record"}},"created_at":"2026-05-18T02:08:06.668431+00:00","updated_at":"2026-05-18T02:08:06.668431+00:00"}