At the page you link to, they do show other filters used, but the files will not download for me to try and view.
That is not what I said. Quote me where I said they used no filters or retract the claim.
OK, that's not what you said, it's what I said, as the clear filter is really no filter at all. And of course it's false color. If the CCD is picking up IR or UV, how could I see it? They could have used pink for the images, but then people would have thought the heavens were pink. The CCD collected photons of unknown wavelength, and they colored them white in the final product. You still would see zilch, by eye.