Astronomy and Coffee

Flats over ... no fringing correction.

Flatfielded and checked the images. They are not perfect, but as good as it can get.

Tried the fringing correction, actually residual fringing because the ilumination flat had some patern. There's no fringing left, at least not in the limits of the images noise.

Now comes the part I'm still figuring out. Rejoining the parts of the CCDs.

In a "regular" mosaicing you can subtract the sky with something like SExtractor and just stick them together. I work with components that are a very small fraction of the sky light and any sky estimate would erase it ... I was thinking on measuring the diference level at the border and add it. Let's make some tests about it.

posted by Cris Da Rocha @ 8:56 PM