Palomar 11
21 iterations.
Chebyshev coeffients a(0)T_0(u)+a(1)T_1(u)+..., where u is log (r/arcsec) mapped to [-1,1]
 a(0)=    21.124 +-  0.218
 a(1)=     1.923 +-  0.333
 a(2)=     0.646 +-  0.313
Power-of-x coeffients a(0)+a(1)x+a(2)x^2+..., where x=1+(r/r_c), r_c=1.87
 a(0)=     9.2859
 a(1)=    -0.8416
 a(2)=     2.0779
log r(arcsec)   mu_V    mu_V(fitted)  residual   weight  data set