FROM TH2F
constant
0.025419015911370513+-0.018660270560544957
chi2/ndof = 0.002409392538978505
plane
0.016241105595501543+-0.04528358683694549
invpt slope = 0.006907027376543915+-0.027800273036933294
theta slope = 0.0034332309903981877+-0.0543487538164307
chi2/ndof = 0.0014656512873716307
from tgraph2D
constant
0.02593092026351427+-0.0010491025741572516
chi2/ndof = 9.905545899946304e-05
plane
0.014854243269003012+-0.0015396275533850678
invpt slope = 0.008221456664824798+-0.0009433358549871139
theta slope = 0.005736387417380185+-0.002008592198367147
chi2/ndof = 4.7957613768030725e-05