FROM TH2F
constant
10.75009194071382+-0.30311899903035466
chi2/ndof = 1.5872988610429182
plane
7.338819276629793+-0.7006051783665226
invpt slope = 0.1300538423474929+-0.2572333664166878
theta slope = 5.230588193968163+-0.9908401981275392
chi2/ndof = 1.3155448631654587
from tgraph2D
constant
11.988642184998577+-0.4065248206806937
chi2/ndof = 21.979903160006717
plane
6.345913115599574+-0.6861220077502028
invpt slope = 1.1633075017829824+-0.25236584855883715
theta slope = 5.687041299386564+-0.9900400678166166
chi2/ndof = 13.294181110730182