How do I subtract background in a different attenuator state from the flare intervals?
First a few general comments on the attenuators. They only modulate solar X-rays. There is very little other flux coming through the grids so the attenuator position is irrelevant when there is no solar flux. There is no solar flux at night and at times with no flares and no active region activity. When the GOES level is sub-B, expect very little active region flux to be detectable. The attenuator state only matters at low energies for background. The active region flux is never detectable above 15 keV, and probably lower, most often below 10 keV, so above that energy the attenuator state is irrelevant to background modeling. From the above considerations, the attenuator state is only important below 15 keV and only when there is solar activity. If you have some night-time observations you can use that in the background model below 15 keV. Using SPEX (see first_steps and second_steps), you can define the background model regions independently in up to five separate energy bands. And yo
