FROM TH2F
constant
0.028713313788765703+-0.020701616418213404
chi2/ndof = 0.00582733324643602
plane
0.06002462519963212+-0.14751347280621374
invpt slope = 0.007611566572840733+-0.017243405282885725
theta slope = -0.03611469679843628+-0.12015541411071677
chi2/ndof = 0.0019672915788349205
from tgraph2D
constant
0.0327033840869852+-0.001770516257807236
chi2/ndof = 0.00022883513078447335
plane
0.07135841923277181+-0.006056376521484464
invpt slope = 0.007615871361063857+-0.0007874451609698193
theta slope = -0.044288988388914485+-0.004994910700863368
chi2/ndof = 7.277418575548119e-05