FROM TH2F
constant
0.03856684629371042+-0.017565157843898168
chi2/ndof = 0.013403217272920693
plane
0.0626963662969802+-0.09708342410400071
invpt slope = 0.008736501268488055+-0.009299915158961135
theta slope = -0.038061983066456556+-0.08373860637172303
chi2/ndof = 0.005556163936017816
from tgraph2D
constant
0.04953349556518563+-0.002200303575164847
chi2/ndof = 0.0006390563284556495
plane
0.07427282291982445+-0.007236941243864472
invpt slope = 0.009110697781686017+-0.0007190456404357502
theta slope = -0.04514814715846903+-0.006500034712245765
chi2/ndof = 0.0002736148375699811