FROM TH2F
constant
0.021785148141459224+-0.023943545521875866
chi2/ndof = 0.0019168497174506158
plane
-0.004408380418883572+-0.2804139172750217
invpt slope = 0.0025419072988196825+-0.021030725234216337
theta slope = 0.01796677562861669+-0.23331001340944207
chi2/ndof = 0.001336810562122731
from tgraph2D
constant
0.022924552257777956+-0.001089708637304225
chi2/ndof = 4.9873526397023554e-05
plane
-0.011999857881897641+-0.009126894881367737
invpt slope = 0.003430541727112857+-0.0006417046450408832
theta slope = 0.023770285901802937+-0.007446309389397789
chi2/ndof = 2.540052106256719e-05