FROM TH2F
constant
0.00866110661994916+-0.013432785314278002
chi2/ndof = 0.002941123637742914
plane
-0.004853942592418444+-0.13358224496547388
invpt slope = 0.0030695885577477857+-0.010609935767644754
theta slope = 0.0067149194345159395+-0.10883240966604249
chi2/ndof = 0.0011466114482777475
from tgraph2D
constant
0.01084736754243355+-0.0008672922437948558
chi2/ndof = 3.911418347955723e-05
plane
0.005810743315686182+-0.004916972781512613
invpt slope = 0.0036518208935528594+-0.0002940086427733792
theta slope = -0.002281749136649717+-0.00403404701387223
chi2/ndof = 9.808593064661601e-06