apply_persistence_mask

grizli.prep.apply_persistence_mask(flt_file, path='../Persistence', dq_value=1024, err_threshold=0.6, sci_threshold=0.1, grow_mask=3, subtract=True, verbose=True, reset=False)

Make a mask for pixels flagged as being affected by persistence

Persistence products can be downloaded from https://archive.stsci.edu/prepds/persist/search.php, specifically the “_persist.fits” files.

Parameters

flt_filestr

Filename of the WFC3/IR FLT exposure

pathstr

Path to look for the “persist.fits” file.

dq_valueint

DQ bit to flip for flagged pixels

err_thresholdfloat

ERR array threshold for defining affected pixels:

>>> flagged = persist > err_threshold*ERR

grow_maskint

Factor by which to dilate the persistence mask.

subtractbool

Subtract the persistence model itself from the SCI extension.

resetbool

Unset dq_value bit.

verbosebool

Print information to the terminal

Returns

Nothing, updates the DQ extension of flt_file.