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The origin of the nuclear infrared emission is determined from: 1) the comparison of the correlated fluxes from VLTI/MIDI with the fluxes measured at subarcsec resolution (VLT/VISIR, VLT/ISAAC); 2) diagnostics based on IR fine-structure line ratios, the IR continuum emission, IR bands produced by polycyclic aromatic hydrocarbons (PAH) and silicates; and 3) the high-angular resolution spectral energy distribution. Results: The unresolved flux of IC 3639 is $90 \\pm 20\\"},"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":"1711.01268","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-11-03T18:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"e1f71798de48a543df4999746bc6e7286344b50a6f9b9530337da0c8b6ac3e5c","abstract_canon_sha256":"f6d9d7354ed26c2c873ba3142cded5be866882ed5889ebfb3c477832a0aaab94"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:20:38.496494Z","signature_b64":"hupN8og71IasPIfMmORdBcQ4mQGm7w7duTA1kS48HUyDzZSZesCI8oNPcSZUXifAwmCKyOTdIUxtF7bx9oliAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8ec1a7d48bead5a6f814bf7634636e2446e7eff1e07ed2fcefa9d0305eff237c","last_reissued_at":"2026-05-18T00:20:38.495822Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:20:38.495822Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Embedded AGN and star formation in the central 80 pc of IC 3639","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"G. Weigelt, J.A. Fern\\'andez-Ontiveros, K.R.W. Tristram, P. Gandhi, S. H\\\"onig","submitted_at":"2017-11-03T18:00:00Z","abstract_excerpt":"[Abridged] Methods: We use interferometric observations in the $N$-band with VLTI/MIDI to resolve the mid-IR nucleus of IC 3639. The origin of the nuclear infrared emission is determined from: 1) the comparison of the correlated fluxes from VLTI/MIDI with the fluxes measured at subarcsec resolution (VLT/VISIR, VLT/ISAAC); 2) diagnostics based on IR fine-structure line ratios, the IR continuum emission, IR bands produced by polycyclic aromatic hydrocarbons (PAH) and silicates; and 3) the high-angular resolution spectral energy distribution. 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