FROM TH2F
constant
0.020220621454806586+-0.01711877579629813
chi2/ndof = 0.003905249205338837
plane
0.04497403731429402+-0.10734665152419527
invpt slope = 0.002183741985645122+-0.011967685876431705
theta slope = -0.02522627994409926+-0.09752329564921822
chi2/ndof = 0.0028673164768196415
from tgraph2D
constant
0.02229922864441395+-0.0010259652729287653
chi2/ndof = 7.999796033559234e-05
plane
0.03793720344626495+-0.004459650880459666
invpt slope = 0.004308035419303743+-0.0005596808649169749
theta slope = -0.02121034161914984+-0.0041767523285908366
chi2/ndof = 4.318009811325697e-05