FROM TH2F
constant
0.024001657595294327+-0.018650740205711263
chi2/ndof = 0.010156814696872955
plane
0.02974198189127118+-0.04384874696236599
invpt slope = 0.002812749537250793+-0.021899751659388667
theta slope = -0.014987638722885971+-0.06250463837186485
chi2/ndof = 0.009516319430850614
from tgraph2D
constant
0.030360380080540133+-0.001801883239472956
chi2/ndof = 0.0002759765727419612
plane
0.01651801393359689+-0.0023466801508282343
invpt slope = 0.016235693902939892+-0.0013190865996522405
theta slope = -0.0035586999805813316+-0.003333687131724686
chi2/ndof = 9.92689726400126e-05