FROM TH2F
constant
0.03603596523860017+-0.01598668889721127
chi2/ndof = 0.02245830206457736
plane
0.039374657721575994+-0.08947688618310097
invpt slope = 0.010977958994027964+-0.008204756291409826
theta slope = -0.02425118314032633+-0.07657749099127834
chi2/ndof = 0.00964150572562681
from tgraph2D
constant
0.05586950554402551+-0.0031569447381375256
chi2/ndof = 0.0014750124117439178
plane
0.043285674805335024+-0.009503711796739785
invpt slope = 0.014329884385292455+-0.0008815162780147093
theta slope = -0.029351789968367036+-0.008605034158895821
chi2/ndof = 0.0005253384291082839