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NGC253 Sculptor Galaxy
While looking forward some older stuff to reprocess a couple of images to put back on astrobin, I found some extra subs I never was that happy with. They were pretty noisy, and had some weird banding I haven't seen before or since.
In the end I managed to get rid of the banding playing round with masks, pixel math and curves transform in pixinsight. It came out ok in the end, not sure if the colors are right, and there is still plenty of noise around the galaxy.
22 x 60sec ISO400 unguided
20 flats, darks and 40 bias
You can still just make out the horizontal bands, they aren't in the usual place for this camera and the darks from that night nor any other seemed to show anything in the same place either.
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