FROM TH2F
constant
41.74976944244929+-0.6335930018355781
chi2/ndof = 17.319029134306252
plane
45.137165831358686+-3.393406116258074
invpt slope = 7.297655200479684+-0.4193359290519469
theta slope = -16.77829849714438+-2.733906124959881
chi2/ndof = 13.858888406297808
from tgraph2D
constant
56.91335154259513+-3.1666549253145764
chi2/ndof = 1113.0750810200427
plane
69.88057019079976+-15.010461423273373
invpt slope = 6.978112861835632+-1.8130411972986895
theta slope = -26.947625510487676+-13.121904012723176
chi2/ndof = 972.2782328888907