FROM TH2F
constant
0.004829491597172267+-0.004562540317106164
chi2/ndof = 0.009413028564364361
plane
-0.0035596750244977935+-0.01393192687187039
invpt slope = 0.0009659410983324387+-0.0018332938028320232
theta slope = 0.005656431890031+-0.01159370097839621
chi2/ndof = 0.007658206796051548
from tgraph2D
constant
0.018415229383311704+-0.00214457799754466
chi2/ndof = 0.0012095934890820044
plane
-0.0008216528001790332+-0.00658966832196799
invpt slope = 0.005483126341243976+-0.0005895650591268859
theta slope = -0.007471556415157834+-0.005621064210694947
chi2/ndof = 0.0009106034049951175