Calibration Files

import procastro as pa

master_bias = pa.AstroDir("*.fits").filterfilter(object="bias").median()

master_flat = pa.AstroDir("*.fits", mbias=master_bias).filter(object="flat").median(normalize=True)

science_frames = pa.AstroDir("*.fits", mbias=master_bias, mflat=master_flat).filter(exptime_gt=40, object_ne="flat")

if mbias or mflat keywords are used, then all the operations on data will have those calibrations applied automatically. It even handles itself correctly if there is different trimming on those frames in the standard FITS format

TRIMSEC=[1:200, 3:400]