Syntax:

-chi2

Example 1.
$ ./vartools -header -l EXAMPLES/lc_list -chi2

#Name Chi2_0 Weighted_Mean_Mag_0
EXAMPLES/1  34711.71793  10.24430
EXAMPLES/2   1709.50065  10.11178
EXAMPLES/3     27.06322  10.16684
EXAMPLES/4      5.19874  10.35137
EXAMPLES/5      8.26418  10.43932
EXAMPLES/6      3.94650  10.52748
EXAMPLES/7     10.39941  10.56951
EXAMPLES/8      4.19887  10.61132
EXAMPLES/9      2.67020  10.73129
EXAMPLES/10      3.72218  10.87763

Calculate chi2 per degree of freedom and the weighted mean magnitude for all light curves in the list EXAMPLES/lc_list.