Description of Parameters for EONS Routines Several parameters are required to execute the EONS routine, Load_Shift. They are described below: Master Shifts File: The master data file containing the filenames of NICMOS data where the center of the coronagraphic hole has been measured to 0.001 pixels. The default name for this file is 'master_shifts.idp3'. Mask File: The mask file contains a mask for the diffraction spikes when computing the flux for normalization. The default name for this file is 'c2_mask.fit'. Bad Pixel List File: An ASCII text file which lists bad pixel coordinates in the order x then y for pixels to be omitted from computations. The default name for this file is 'c2_badpix.txt'. Inner Radius: The inner radius for defining the annulus for the flux computation. The default value is 13 pixels. Outer Radius: The outer radius for defining the annulus for the flux computation. The default value is 26 pixels. Mask XCenter: X center of the mask file. Default is 70. Mask YCenter: Y center of the mask file. Default is 211.