input, f, a, "", , , Input images output, f, a, "", , , Output image name masks, f, a, "", , , Input/output masks (optional) sigmas, s, a, "8,6,4", , , Rejections levels in each iteration radius, r, h, 1.5, 0., , CR expansion radius in pixels pfactor, r, h, 0.5, 0., , CR expansion discriminator reduction factor initial, s, h, "min", "min|med", , Initial value estimate scheme (min or med) lower, r, h, -99., , , Lower limit of usable data upper, r, h, 4096., , , Upper limit of usable data sky, s, h, "none", "mode|none", , How to compute the sky expname, s, h, "exptime", , , Exposure time keyword name readnoise, s, h, "0.72", , , Read noise(s) (in DN) of the detector(s) atodgain, s, h, "7", , , Detector gain(s) in electrons/DN scalenoise, s, h, "3,1", , , Multiplicative term (in PERCENT) from noise model dq, pset, h, , , , Data quality filter pset skyname, s, h, "BACKGRND", , , Name of the group parameter to be updated with the sky value crdqval, i, h, 128, , , Data quality value for pixels flagged as cosmic ray fillval, r, h, 0., , , Fill value for pixels having no good values in all input images verbose, b, h, yes, , , Print out verbose messages? mode, s, h, "al"