FROM TH2F
constant
0.018712325804470235+-0.021628872947025524
chi2/ndof = 0.012055532203865916
plane
0.0029745001474879296+-0.12909828681972682
invpt slope = 0.008931233334277155+-0.025811217812079634
theta slope = 0.005889320057939597+-0.12113239443527908
chi2/ndof = 0.009452504038041556
from tgraph2D
constant
0.028203883901262262+-0.002327295127408389
chi2/ndof = 0.00024373361745416892
plane
0.05412941498376262+-0.012994592406875016
invpt slope = 0.00787963885484411+-0.002115543855761263
theta slope = -0.03500095961947367+-0.011633023055508241
chi2/ndof = 0.00014593928752248844