PICsIT needs long integration times to produce a good image. Thus if INTEGRAL was stable during several Science Windows it is recommended
to sum up PICsIT shadowgrams before the deconvolution. If the ibis_science_analysis parameter
staring is set to yes, then sumhist checks that INTEGRAL was stable
during all the Science Windows within the given limits and sums all the PICsIT shadowgrams into
one.
Table 20:sumhist parameters included into the main script.
