FROM TH2F
constant
0.025127423694644442+-0.021571338890644064
chi2/ndof = 0.03630120896720356
plane
-0.007733607379017977+-0.046763500220454224
invpt slope = 0.0519646147214855+-0.04341063224234883
theta slope = 0.0035957017156121665+-0.08371094801285205
chi2/ndof = 0.007737742950318144
from tgraph2D
constant
0.05013501101012064+-0.005884122921339554
chi2/ndof = 0.002319734470975649
plane
-0.011912978333124645+-0.00485172044411138
invpt slope = 0.052822236065114186+-0.003677487486765124
theta slope = 0.028380164703583895+-0.00859359892192152
chi2/ndof = 0.00041686731036115254