FROM TH2F
constant
0.03190410150338838+-0.014120928945947773
chi2/ndof = 0.03024423876473839
plane
-0.002682725055810826+-0.032112685178262934
invpt slope = 0.021918077467179976+-0.010813618682005179
theta slope = 0.006530123142082053+-0.041270678417559443
chi2/ndof = 0.004176975580566186
from tgraph2D
constant
0.05658987265164846+-0.003390895490583234
chi2/ndof = 0.002035176485424573
plane
-0.006948406788865788+-0.0027177885228641275
invpt slope = 0.025228092510871457+-0.000677902226432113
theta slope = 0.008095727977607851+-0.0033470037987935203
chi2/ndof = 0.00022428370115638424