FROM TH2F
constant
25.707297155173777+-0.4995852380565526
chi2/ndof = 37.04208062256041
plane
-125.09163749379915+-4.915260866184172
invpt slope = -3.3014946352033303+-0.18525159212132436
theta slope = 136.49062397973148+-4.329703484150677
chi2/ndof = 27.77898111746133
from tgraph2D
constant
61.60330704206013+-3.7191697668380046
chi2/ndof = 1480.0479375278653
plane
26.400696122049553+-31.263001579394476
invpt slope = -8.188345510034807+-1.2454157828917085
theta slope = 53.14229314290188+-24.43435324734733
chi2/ndof = 1049.498809945128