Dome Flat Linearity Test

Data Taking:

• 1. During the afternoon (or on a cloudy night), aim the telescope at the flat field screen and turn on the dome flat lamps to a typical brightness used for normal flat field exposures.

  2. Take this series of exposures (without changing the dome flat brightness):

     • 10s-1s-10s-2s-10s-4s-10s-8s-10s-16s-10s-32s-10s-64s-10s-128s-...-(to saturation)

     • The interspersed 10sec exposures are used to remove variations in the dome flat lamp output as a function of time (if there are any such variations).

  3. This should only need be done in a single filter (e.g., i-band).

Data Analysis:

• 1. Generally not the observer's responsibility.

  2. See code from Steve Kuhlmann and from Juan Estrada.