Hi all,

I have some thumbnails of Hubble XDF images (as .fits files, of course). I'm trying to fit models with a program called "Galfit", however, Galfit is not rendering proper fits because I am not feeding it proper sigma files. I was wondering if any of you knew how to CREATE weightmap files using the science files. I'm pretty desperate for this solution, because I have to finish this project by the end of this week, and if I cannot create a decent sigma image, then I have to scrap the entire thing. This is the link to the Hubble XDF images. I'm using the WFCIR3 images. Notice how the weightmap is more or less constant; Galfit requires the weightmap sigma image to resemble the galaxy image itself, and this is obviously not the case.

XDF Data Release