Images of the 2^′′ × 2^′′ region surrounding the candidate optical counterpart to the RB (white circle) acquired at different times. The top and bottom panels show HST/ACS images in the F814W filter and Ks-band GeMS images, respectively. For visualization purposes, a 2-pixel smoothing has been applied to the F814W images. The images in the right panels were acquired approximately 1.5−2 hours after those in the left panels. The corresponding changes in magnitudes are about ∼ 0.4 mag for the Ks band (bottom row) and ∼ 0.5 mags for the F814W filter (top row).