FROM TH2F
constant
7.0389317281157835+-0.2812278798902061
chi2/ndof = 16.624683905439475
plane
24.074319911437886+-2.1208167065947814
invpt slope = -3.7347884818552246+-0.17446388514349023
theta slope = -1.1379644481526476+-1.7506031343454937
chi2/ndof = 11.681968743062123
from tgraph2D
constant
24.65242951572067+-2.5154310471376364
chi2/ndof = 594.7749756225105
plane
85.19921241748203+-15.166700224920096
invpt slope = -5.590356555698124+-1.2809045912242076
theta slope = -40.750546418932124+-13.175052004754146
chi2/ndof = 458.59425321469837