Pt   t(start)     t(end)             z
==========================================
   1 1288416161   1288416162         0.00 # no succesful fit
   2 1288416300   1288416517         0.00 # no succesful fit
   3 1288416533   1288416701      -120.40
   4 1288416717   1288416893      -122.19
   5 1288416900   1288417108       -88.60
   6 1288417112   1288417279       -58.37
   7 1288417283   1288417385       -26.00
   8 1288417388   1288417501         3.15
   9 1288417504   1288417649         0.00 # no succesful fit
  10 1288417653   1288417734        72.12
  11 1288417739   1288417829        84.07
  12 1288417832   1288417911       119.69
  13 1288417914   1288418003       129.84
  14 1288418006   1288418155         0.00 # no succesful fit
  15 1288418177   1288418301         0.00 # no succesful fit
  16 1288418308   1288418434         0.00 # no succesful fit