Livetime of predetermined background. A value of 0 will make the exposure time used for background time. The wavelet radii, in pixels, are given by this list of numbers separated by spaces. Quotes are required around the list of scales. Wtransform produces a complete set of outputs for each scale.
Small scales tend to detect small features, and larger scales larger features.
The user specifies how many iterations the program should go through to calculate the background. This parameter should not be larger than 1, nor smaller than one over the number of pixels in the dataset. A typical scenario in which the users may select to use offsets is when their data file is a sum of two or more observations, with different pointings. The nominal pointing in such data file is usually poorly defined and the off-axis angle could be calculated from an undesired origin, leading to suboptimal selection of the detect cell size. The values 1 keV and .393 are used.