Palomar 5
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)=     1.545 +-  0.232
 a(1)=     1.989 +-  0.357
 a(2)=     0.397 +-  0.345
Power-of-x coeffients a(0)+a(1)x+a(2)x^2+..., where x=1+(r/r_c)^2, r_c=2.24
 a(0)=    -0.8261
 a(1)=     0.5210
 a(2)=     1.5782
log r(arcsec)   mu_V    mu_V(fitted)  residual   weight  data set