Dome Flat Bad Pixel Map

Data Taking:

• 1. Take 5 normal-length exposure dome flats (these can just be from the typical set of daily dome flats taken that afternoon).

  2. Take 50 short-exposure dome flats (at an exposure time 1/10th that of the normal-length exposures).

Data Analysis:

• 1. Generally not the observer's responsibility.

  2. Bias-subtract and median-combine each of two sets of dome flats from Steps 1 and 2 above.

  3. Divide the median-combined normal-exposure flat by the median-combined short-exposure flat. This is your bad pixel map.