FROM TH2F
constant
0.0406522547442591+-0.02113594271180509
chi2/ndof = 0.016098276743085938
plane
-0.022487487614588627+-0.10637904858340405
invpt slope = 0.00995572192883055+-0.01366496168577295
theta slope = 0.04098268268308029+-0.09413435917078836
chi2/ndof = 0.008071984744465065
from tgraph2D
constant
0.05502351696945009+-0.0029086975654228717
chi2/ndof = 0.0008206705880701969
plane
0.0026921550814932756+-0.010576713238100657
invpt slope = 0.01126165161473392+-0.0010071769138770578
theta slope = 0.02296945454017974+-0.009136222543697267
chi2/ndof = 0.0003377545805359726