FROM TH2F
constant
29.504476912864483+-0.9053003931954785
chi2/ndof = 38.15371778949668
plane
198.90459810471384+-6.811617101558732
invpt slope = 6.835409048926543+-1.3193115845820176
theta slope = -152.40693812215693+-5.703849116866222
chi2/ndof = 18.175565629785805
from tgraph2D
constant
65.79208457959966+-6.233340866513321
chi2/ndof = 1631.8906107528317
plane
263.0327016464031+-25.711724536356694
invpt slope = 5.353794747494635+-4.842582552161784
theta slope = -196.4551872004454+-24.196490295579288
chi2/ndof = 630.3522735699144