FROM TH2F
constant
0.005457355942550551+-0.01101247367721985
chi2/ndof = 0.001890101420762664
plane
0.016338736626382497+-0.09777901346717814
invpt slope = 0.00034761317025924353+-0.010400560293791938
theta slope = -0.008895919637161225+-0.07719713633273242
chi2/ndof = 0.0016612694700696682
from tgraph2D
constant
0.006679836152364766+-0.0005271942336690107
chi2/ndof = 1.4174621760698335e-05
plane
0.02339803763279607+-0.003089900918270596
invpt slope = 0.0018440336385974541+-0.00036540932523101207
theta slope = -0.01541603277851539+-0.0025335046549351593
chi2/ndof = 7.248227595593318e-06