FROM TH2F
constant
21.10292138673987+-0.5742239513864155
chi2/ndof = 25.67002931211674
plane
71.05848531558084+-6.025495781061586
invpt slope = -3.3743516124019646+-0.3496066630346829
theta slope = -28.484740985533083+-4.752068898685507
chi2/ndof = 23.443295489014336
from tgraph2D
constant
49.35631952447066+-3.76271924087869
chi2/ndof = 1033.538095658313
plane
-14.800273544514411+-40.74517199762801
invpt slope = -1.3353666665065433+-1.4795744928868237
theta slope = 52.50881248063923+-31.24886210723829
chi2/ndof = 1012.1079771607428