ACS/WFC data of Abell 1689 were observed with the HST proposal 9289: H. Ford and N. Benitez (Johns Hopkins University), and T. Broadhurst (Tel Aviv University).
The science team for this release includes: E. Jullo (Jet Propulsion Laboratory), P. Natarajan (Yale University), J.-P. Kneib (Laboratoire d'Astrophysique de Marseille, CNRS, France), A. D'Aloisio (Yale University), M. Limousin (Laboratoire d'Astrophysique de Marseille and University of Copenhagen, Denmark), J. Richard (Durham University, U.K.), and C. Schimd (Laboratoire d'Astrophysique de Marseille, CNRS, France).
This image is a composite of separate exposures acquired by the ACS instrument on the Hubble Space Telescope (HST). Several filters were used to sample broad wavelength ranges. The color results from assigning different hues (colors) to each monochromatic (grayscale) image associated with an individual filter. In this case, the assigned colors are:
Blue: Dark Matter Map + F475W (g)
Green: F775W (i)
Red: F850LP (z)