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epevents (epevents-6.55) [xmmsas_20211130_0941-20.0.0]

Isolated case:

Although a unique reconstruction of the number and energy of the photons which have caused such a pattern is not possible, the amplitudes may contain useful information, e.g. if the energy of the photons is known already. Thus, PAT_TYP is positive for all pixels. To distinguish this case from the recognizable pattern case, PAT_IND is always negative. (The main pixel can be found after the column PI has been filled, since this will contain the negative sum of the corrected energies for this pixel, and zero for the others.)

  triple quadruple larger pattern
PAT_TYP 3 4 n
PAT_IND always $<0$
PAT_ORI always = 0
PI -sum(a) for pixel with maximum amplitude

XMM-Newton SOC -- 2021-11-30