FROM TH2F
constant
0.020568462927672948+-0.016238788209889575
chi2/ndof = 0.0077897819912332595
plane
-0.008841958494670121+-0.08735978603361533
invpt slope = 0.002190661848276892+-0.010488116351528626
theta slope = 0.0208467485887607+-0.07423777829721633
chi2/ndof = 0.006090123154391004
from tgraph2D
constant
0.027412043770706856+-0.0014047395410321888
chi2/ndof = 0.00016181004060878597
plane
0.021547340873883193+-0.0077883168259222585
invpt slope = 0.0042309277773769135+-0.0006911730846268044
theta slope = -0.004187903983635707+-0.006228212311535298
chi2/ndof = 0.00011239518854480478