Because DN is not a unit that is part of the FITS standard, I've used "ct" as a substitute for DN as "ct" (count) is a unit designation that is part of the FITS standard. However, this is becoming increasingly confusing as people seem to conflate ct with electron and/or photon. Instead, we should just express all of the responses using actual DN. This should also change when dealing with the temperature responses when doing the DEM inversion if starting from a set of solar images.
Because DN is not a unit that is part of the FITS standard, I've used "ct" as a substitute for DN as "ct" (count) is a unit designation that is part of the FITS standard. However, this is becoming increasingly confusing as people seem to conflate ct with electron and/or photon. Instead, we should just express all of the responses using actual DN. This should also change when dealing with the temperature responses when doing the DEM inversion if starting from a set of solar images.