FROM TH2F
constant
0.020361648707051157+-0.02853884980663714
chi2/ndof = 0.001383110005445124
plane
-0.009182051862956807+-0.3241568615080939
invpt slope = 0.006837445468416512+-0.04017315576182103
theta slope = 0.017527972864242833+-0.26284221221464765
chi2/ndof = 0.00019171439758682712
from tgraph2D
constant
0.020675335501764144+-0.0012122369324797588
chi2/ndof = 3.967699627264021e-05
plane
-0.009524236419398554+-0.004574050432118429
invpt slope = 0.007391320950775172+-0.0004951103351587063
theta slope = 0.017065960781325346+-0.0037266596937273284
chi2/ndof = 4.234189376574355e-06