FROM TH2F
constant
0.020258741175756708+-0.022228712026632444
chi2/ndof = 0.0034063965365654586
plane
0.030046300096402787+-0.17251499951586327
invpt slope = 0.005124836978950861+-0.02575846383842053
theta slope = -0.014641647693586678+-0.14234705052277197
chi2/ndof = 0.002066922517808921
from tgraph2D
constant
0.022650306961315037+-0.0013449143618067523
chi2/ndof = 8.13957588264638e-05
plane
0.04790419013902919+-0.007442207936767567
invpt slope = 0.004723705149094478+-0.000930893391832766
theta slope = -0.028300081009256267+-0.00617434575203935
chi2/ndof = 3.425690107855055e-05