FROM TH2F
constant
0.02195595169055726+-0.019979968003135264
chi2/ndof = 0.006626639077538097
plane
0.02073797215192462+-0.13854832021792918
invpt slope = 0.0024643530254199932+-0.015173735629444627
theta slope = -0.0033063662727629336+-0.11626521899822431
chi2/ndof = 0.006370008347348076
from tgraph2D
constant
0.027301941431505574+-0.001552485760929721
chi2/ndof = 0.00014220251023781583
plane
0.03331603875780295+-0.008276119410047064
invpt slope = 0.005416071223487339+-0.0008543598180998784
theta slope = -0.014798462282198905+-0.0070740423251467
chi2/ndof = 8.474385192276197e-05