Makes a copy of the masterbias and index file in the calibration library
This primitive is suitable for optical imaging instruments.
Processing only occurs for bias frames, and when the steering header MAKE_BIAS is true.
"
bias_<instrument>_<UT
night>_bin<Xbin>x<Ybin>"
where <instrument>
is the LCOGT instrument identifier and
<Xbin>,
<Ybin>
are the binning factors in X and Y.