FROM TH2F
constant
0.031885184758503986+-0.020218417838468054
chi2/ndof = 0.012872778079933934
plane
0.007178692211572668+-0.04912134961112822
invpt slope = 0.027111975121259273+-0.02932531878830654
theta slope = -0.0006122803581076932+-0.06329890177859512
chi2/ndof = 0.0018106599483551362
from tgraph2D
constant
0.039538147951370596+-0.00288397487885949
chi2/ndof = 0.0007818272435754932
plane
0.009300438273879247+-0.00259759132109729
invpt slope = 0.028644695987875717+-0.0012988497574273133
theta slope = -0.002067273492134057+-0.0035656405536989328
chi2/ndof = 0.00012593197734754775