This task applies two non-parametric statistical tests, the Kolmogorov-Smirnov and Cramer-Von Mises tests, to the cumulative distribution of photon arrival times (with data gaps removed), to test the hypothesis that the source rate is constant. Input file is a timesorted qp file. Results are listed on the screen and can be plotted with the task ksplot.
input file: rp90_sti.qp
output files: rp90_iq1.cmd,rp90_iq2.cmd,rp90_var.tab
xt> vartst Input source timing file: rp90 Root name for output files: rp90 Number of Events: 14625Ks-text Thresh. : 90% = 0.010, 95% = 0.011, 99% = 0.013
Max diff = 0.02448, Variability detected with 99% confidence level
CvM Thresh. : 90% = 0.347, 95% = 0.461, 99% = 0.743
CvM = 3.57285, Variability detected with 99% confidence level
Creating igi Ksplot cmd file: rp90_ig1.cmd Creating igi Conf band cmd file: rp90_ig2.cmd Creating Var file: rp90_var.tab xt> ksplot Root name for input file(s): rp90 # plot appears in grapic window xt> =gcur # give control to graphics cursor
Type = for hard copy, q to return control to text window.