H-band view of the 3.8′ ×  3.3′ cluster environment. Red contours indicate the log-spaced projected densities of very red galaxies with colors 3 ≤ z − H ≤ 4 (see Fig. 3) spanning the levels 2–16 arcmin^-2, Chandra X-ray surface brightness contours (0.7–2 keV, log-spaced) are shown in blue in the range 0.014–0.082 counts arcsec^-2. 30″ (dashed) and 60″ (solid) radii around the X-ray center are marked by circles.