FROM TH2F
constant
0.024307526023048122+-0.015590871055685332
chi2/ndof = 0.01988221396985798
plane
0.060497054046918186+-0.09704985778280387
invpt slope = 0.0034171367949169798+-0.008945565166025685
theta slope = -0.038571031700893335+-0.08156826316778194
chi2/ndof = 0.01612037181507251
from tgraph2D
constant
0.04170763563455959+-0.0030805340612845202
chi2/ndof = 0.0010059071508984607
plane
0.11229737892229219+-0.010299058754244453
invpt slope = 0.011097413873243664+-0.001239261970601459
theta slope = -0.09165384300917137+-0.009561480233708598
chi2/ndof = 0.00042430049905171473