ALMA images of the GRB 151027B location at band 3 (97.5 GHz; left) and band 7 (343.5 GHz; right) in the International Celestial Reference System (ICRS). The concentric circles around our best-fit GROND position are the 1σ, 2σ, and 3σ error circles. The contour in the lower left of each figure gives the size of the synthesized beam of the observation. The smaller beam size makes the band 7 image look smoother than that of band 3; the rms noise is actually worse (see text).