FROM TH2F
constant
0.027398627570760354+-0.016635919393439648
chi2/ndof = 0.017295892830717897
plane
0.07373423496881007+-0.09728265658876334
invpt slope = 0.009743754942837853+-0.010679602999415925
theta slope = -0.05558972836297045+-0.08293768235690077
chi2/ndof = 0.004860716765663085
from tgraph2D
constant
0.042101471982216726+-0.002890221159146435
chi2/ndof = 0.0008771047264598362
plane
0.10696434227740752+-0.008686919745150921
invpt slope = 0.01176392495886198+-0.0010637699138878736
theta slope = -0.08748023496577802+-0.008078938525042361
chi2/ndof = 0.00030213054702350837