I was just wondering if there is any way within the stack to create and use master calibs (master bias etc) using subsets of calib data taken throughout a night. To give a specific example: cases where the biases etc may not be stable throughout a whole night, so one may need to take biases throughout the night, and only use biases taken close in time to a given science exposure.
I can see how one could create such intra-night cals by using some kind of identifier extracted from the header (e.g., a range of frame-ids), perhaps. But I’m not sure how I would tell the stack to only apply a given cal to a science frame, since the --validity flag only works in units of “days”, whereas we’d need something more fine-grained.
Has anything like this been discussed/considered before?
Thanks in advance for your help,