FROM TH2F
constant
0.013274903287661692+-0.0135784261531799
chi2/ndof = 0.005033375579193763
plane
0.0420640916531756+-0.16471694964424313
invpt slope = 0.0026690559398642746+-0.005860962274307879
theta slope = -0.028839475566942066+-0.1309596263337996
chi2/ndof = 0.0016715483293639345
from tgraph2D
constant
0.01779016440148126+-0.0009791995182938812
chi2/ndof = 7.191237724769109e-05
plane
0.05811466738076955+-0.00744109672399953
invpt slope = 0.0025576426532669047+-0.0002528386747527896
theta slope = -0.0401654175167315+-0.006080665866770617
chi2/ndof = 2.6889934985964638e-05