makeflat -- makes flatfields corresponding to the output image of asncombine.
makeflat association flatlist
calnicb style association input file with list of images to be processed and
ASCII file with list of flatfields as used by NICMOSlook.
resolution in fraction of pixel (see asncombine)
rebinning after processing (see asncombine)
In order to extract spectra from NICMOS grism images, the QE variations as
a function of wavelength have to be taken into account. The ST-ECF tool
NICMOSlook performs this task by determining the appropriate factor from
narrow band flatfields. If images have been shifted and combined with
"asncombine", the same shifts and combination sequence should be applied
to each individual flat field used for the extraction. This task takes
a list of flatfields in the same format as NICMOSlook, shifts and co-adds
each of the flatfields in the list, and creates a new list which can
be used as input for NICMOSlook. The name of the new list is the input
list with the name of the association appended. It is essential that the
same values for the parameters "resolution" and "rebin" are used in this task
and the asncombine task.