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Mid-IR emission by hot dust, unlike the optical and near-IR emission from the accretion disk, is unaffected by the interstellar medium (extinction/scattering) or stellar microlensing. We compare these \"true\" ratios to the (stellar) microlensed flux ratios observed in the optical/near-IR to constrain the structure of the quasar accretion disk. We find a half-light radius of $R_{1/2}=3.4_{-2.1}^{+5.3}\\sqrt{\\langle M \\rangle/0.3\\,\\rm{M_{\\odot}}}$ light-days at $\\lambd"},"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":"1606.03582","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-06-11T12:00:30Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"5b04c7d0580f33a28e062da8e211e3b6179e3e75173bcfaa197f82bedcaa4364","abstract_canon_sha256":"a3c1ee2d6e73e27556427ca54d0653d20f833b92c15f536a4a54f1b6bc879e5e"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:57:43.945550Z","signature_b64":"Z5GjrUXfxa+hKfOXlttab9uCM0j3tsOzN+eJJQfZQbW+/qRHC4jwzLsU9HWLxuAF/A1sqgZ9BbiQbEq9+pomDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"104fc69761fb482d48b66890ed5134719e98351e96eb17922f800c23e9efaa90","last_reissued_at":"2026-05-18T00:57:43.945012Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:57:43.945012Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Observations of the Lensed Quasar Q2237+0305 with CanariCam at GTC","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"C. 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