Hmm... my attempt, and a quickie at that, but would be great to have original data
EDIT: And the second iteration here now as well. I spent quite a bit of time doing a pixel-level 50% strength blur at 500% zoom with a 9px fuzzy brush. I masked the stars first so they'd keep tighter focus and dodged around those that weren't masked. Looks better I think.
Flick between them and the difference is pretty apparent.