This executable reads the events from the imaging formats (FULL or REST) and sorts them according to their position into a 2D histogram - the shadowgram. The grey filter and dead time combined correction factor is evaluated at this step and brought as keyword in the FITS representation of the shadowgram.
TELAPSE | time interval from beginning to end of data window |
ONTIME | sum of the good-time-intervals (GTI) |
EXPOSURE | ONTIME corrected for greyfilter and deadtime |
DEADC | effective fraction surviving when only dead time is considered |
An example of a shadowgram with a very strong on-axis source is shown in Fig. 26. The central part of the mask is imaged on the detector and the similarity with the mask pattern (Fig. 5) can be noticed.