(a) EPIC-pn cleaned image of XMM 2002 in the 0.3–10 keV observed-energy band. The red square marks the 5″ region of the Chandra image centered on the quasar and shown in inset (b). (b) Raw Chandra image of Q2237+030 (ObsID 431) binned with a bin size of 0.1″, color-coded based on the observed-energy bands: 0.4–2 keV in red, 2–4.5 keV in green, and 4.5–7 keV in blue. The images are named A, B, C, and D as in Yee (1988). Given the quasar redshift (z_Q = 1.695), 1″ separation corresponds to a distance of 8.68 kpc (cosmology values: H₀ = 70.0 km s⁻¹ Mpc⁻¹, Λ₀ = 0.73).