I don't know if this is an optical illusion on my part, but as the night got cooler at the time I went to do a Meridian flip (I always do my own manual flip), I thought I noticed that the background of the guide frame became less black. More grayish tone, but still pretty noise free.
So, either I am imagining things, since I wasn't monitoring guiding through the night, or ZWO did not compensate the dark current noise with ∆T. They do have the sensor data for the camera; so on paper, they could have done this, at least partially.
You can probably experiment with it by making ASIAIR recalibrate dark frames after the temperature has changed by a couple of degrees to see if it mattered (or use a cooled camera so you can change the temperature :-).
Chen
