Input Files

• The event list. Must contain the EVENTS table and at least one exposure map extension, as produced by rgsfilter.
• The source description list. Must contain the SOURCES table and all applicable selection region extensions, as produced by rgsregions.
• Optional, a spectrum file. Must be of type NET or TOTAL, as produced by rgsspectrum.
• Optional, an angular distribution. Format: three-column ASCII, all values in floating-point representation. Non-conforming lines are discarded without error or warning. Each line describes a bin: starting angle, ending angle, bin value. The lines should be sorted in ascending order of the angles (otherwise the behavior is undefined). The angles are the dispersion off-axis coordinate in arc minutes, relative to the target source of the response matrix. This coordinate is similar to the DELTA_DISP column of the SOURCES table, except that DELTA_DISP includes the instrument-dependent factor. This coordinate is also similar to the instrument-independent CAL , but follows the opposite sign convention. The author apologizes, and hopes that the benefits of this coordinate system justify the confusion it is bound to cause. Truncate the distribution at a reasonable width to avoid slowing the computation.