FROM TH2F
constant
0.01966227746774044+-0.017130873528816593
chi2/ndof = 0.003034968323685505
plane
0.032169775116404314+-0.14821584038629323
invpt slope = -0.000347026701325703+-0.008475251298074372
theta slope = -0.009089881362954985+-0.119799724799196
chi2/ndof = 0.0029765772126226393
from tgraph2D
constant
0.0228200214510891+-0.0008344440237411777
chi2/ndof = 5.082966849895008e-05
plane
0.04176622626783743+-0.007096180659874349
invpt slope = 0.00030136835382712487+-0.00032870955121447126
theta slope = -0.01569309161099243+-0.005721197180928012
chi2/ndof = 4.7162870168681475e-05