The Hubble data are from proposal 13612: D. Jewitt (University of California, Los Angeles), H. Weaver (JHU/APL), J. Agarwal (Max Planck Institute for Solar System Research), S. Larson (University of Arizona), and M. Mutchler (STScI).
F350LP (long pass)
This image was originally black and white and recorded only overall brightness. These brightness values were translated into a range of bluish hues. Such color "maps" can be useful in helping to distinguish subtly varying brightness in an image.