FROM TH2F
constant
0.023287132975214054+-0.022026089159936313
chi2/ndof = 0.003465357086877442
plane
0.01854550913155243+-0.16482633678209255
invpt slope = 0.005604500298261704+-0.01977206865372982
theta slope = -0.003371572172725914+-0.14367477705416365
chi2/ndof = 0.0018205708788933187
from tgraph2D
constant
0.02568414121864955+-0.0013302283820895817
chi2/ndof = 9.378390007172456e-05
plane
0.019094909368274838+-0.006247178708281911
invpt slope = 0.006090718366710131+-0.0005954814325979193
theta slope = -0.002976210483767167+-0.005496471559465253
chi2/ndof = 3.15796241094082e-05