FROM TH2F
constant
0.012535898967755418+-0.017276393866253584
chi2/ndof = 0.004881845106367632
plane
0.01523640254584992+-0.1119427091777944
invpt slope = 0.0062922533286590065+-0.02038047077091874
theta slope = -0.008910681365652698+-0.10670806151306149
chi2/ndof = 0.002633176666758784
from tgraph2D
constant
0.015445700740451892+-0.0013904291309153962
chi2/ndof = 9.279807206889022e-05
plane
0.009476239381755602+-0.0060735487625421395
invpt slope = 0.007943488451895577+-0.000996762624615507
theta slope = -0.0034547634265366086+-0.005705802203814165
chi2/ndof = 4.005936062701214e-05