FROM TH2F
constant
0.025230150160622175+-0.021818353942408997
chi2/ndof = 0.014424123585897897
plane
0.07529313404197087+-0.115044364293087
invpt slope = 0.00920992810612658+-0.028894032665372705
theta slope = -0.059050679080183355+-0.10483346324254184
chi2/ndof = 0.0057838355373346475
from tgraph2D
constant
0.035936389787947776+-0.003953977531101868
chi2/ndof = 0.0009380362990073449
plane
0.10333845822158681+-0.012985273866225258
invpt slope = 0.011163884718476954+-0.0032905002016425182
theta slope = -0.08763632221762474+-0.01284110366311399
chi2/ndof = 0.00045380476405011325