FROM TH2F
constant
14.014474545788405+-0.5294237347215057
chi2/ndof = 26.508827634921413
plane
48.70754684584158+-4.915543154955191
invpt slope = -2.3972580845635694+-0.35793569638510103
theta slope = -23.457439004091107+-3.807519686196656
chi2/ndof = 26.139253936263284
from tgraph2D
constant
38.86502391122318+-4.4912793600536585
chi2/ndof = 1089.2658738879352
plane
141.04863952692187+-44.47841605434632
invpt slope = 1.3644395007341843+-3.1539067232508744
theta slope = -87.87602463657626+-36.652044141125685
chi2/ndof = 1013.8610241686481