including files 
XIS3_from20070419_1012to20070420_0000.evlist.gz
XIS3_from20070420_0000to20070421_0000.evlist.gz
XIS3_from20070421_0000to20070421_0618.evlist.gz
There are 5 pixels with more than 309 events in 16388 frames in the cal source region.
         891         800        8648
         891         804        4544
         891         808       11995
          24         978        6138
         919        1011         787