Palomar 10
 3 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)=     1.952 +-  0.371
 a(1)=     2.308 +-  0.571
 a(2)=     0.356 +-  0.467
Power-of-x coeffients a(0)+a(1)x+a(2)x^2+..., where x=1+(r/r_c), r_c=1.45
 a(0)=    -1.1766
 a(1)=     0.3824
 a(2)=     0.5050
log r(arcsec)   mu_V    mu_V(fitted)  residual   weight  data set