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The long-term objective is to estimate the mass of both components and the distance to the system. Methods: We used the PIONIER combiner at the VLT Interferometer to obtain the first interferometric measurements of the short-period Cepheid AX Cir and its orbiting component. Results: The companion is resolved by PIONIER at a projected separation $\\rho = 29.2 \\pm 0.2$ mas and projection angle $PA = 167.6 \\pm 0.3^{\\circ}$. We measured $H$-band flux ratios between the com"},"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":"1312.1950","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-12-06T18:20:06Z","cross_cats_sorted":[],"title_canon_sha256":"116c9abbaf164ec02bf44ca69d37077210160a405dc8e85e2d7fd33a4f9fed83","abstract_canon_sha256":"28e781309609b80ad11a3991371e8cdf92f377faa6558fc27d4834458ec9558d"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:45:57.738097Z","signature_b64":"FlmJuHbE+1Izb6QI8iC0VxQxAlF7ZuE4StYObXKhLSgY71hAIITyI25P/VR/eLGyiz6PegoUyf4837VickxrDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"966046c2c1f8f6866b5fb4d43b2767ced54e3945f958d0a22f1287b4470db909","last_reissued_at":"2026-05-18T01:45:57.737644Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:45:57.737644Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Multiplicity of Galactic Cepheids from long-baseline interferometry. 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