including files 
XIS1CI_from20110726_1221to20110727_0000.evlist
There are 18 pixels with more than 248 events in 4929 frames in the cal source region.
        1010         809         331
          51         812        3036
          83         822         858
         991         846         340
         214         863        1045
        1010         863         270
          83         876        1625
        1003         902        2782
         865         903         307
         897         917         314
        1010         917         317
          83         930         348
          42         952         466
           3         970        2704
        1010         971         369
         123         983        3229
          83         984         597
         959        1019         375