FROM TH2F
constant
0.009721936881336076+-0.016209720874674084
chi2/ndof = 0.0025495926223011224
plane
-0.0009996789135287018+-0.14766544819627392
invpt slope = 0.001816429390286671+-0.016770731845927117
theta slope = 0.007174290164478578+-0.12851699654911608
chi2/ndof = 0.0021593895434431493
from tgraph2D
constant
0.010938526679556452+-0.0008809761561965618
chi2/ndof = 3.2596997487040236e-05
plane
0.004101427304280021+-0.005882110799433487
invpt slope = 0.003994194306705638+-0.0006549689173858665
theta slope = 0.0014062692523626845+-0.0049875752281202486
chi2/ndof = 1.7261077550719426e-05