FROM TH2F
constant
0.02148872734984961+-0.02261938030793831
chi2/ndof = 0.001954559972671207
plane
0.020433488952966608+-0.1966139967644947
invpt slope = 0.004567414852367145+-0.022201268863341127
theta slope = -0.005330372352345374+-0.18372358666732042
chi2/ndof = 0.0009483352287596286
from tgraph2D
constant
0.021617043905781674+-0.0011746136313548377
chi2/ndof = 6.484670759926626e-05
plane
0.02466522377311517+-0.005967402368510781
invpt slope = 0.005765231431230559+-0.0006099243085831743
theta slope = -0.01082167012341708+-0.005538675420502207
chi2/ndof = 2.233829032077212e-05