7                 4-shooter Starting guesses, from Smith et al. 2002
1.215              Mt. Hopkins airmass to which mags refer (~1.3 at Apache Pt)
u        
0.  -.026           b and c parms
5.152  2.461            a and k default parms
0.  0.  0.          chip zero points
1.42                cosmic u'-g'
g        
-.001  -.015         b and c parms
3.010  0.242        a and k default parms
0.  0.  0.          chip zero points
1.11                cosmic g'-r'
r       
0.015  -.002         b and c parms
2.737  0.149        a and k default parms
0.  0.  0.          chip zero points
0.48                cosmic r'-i'
i        
-.007  .006          b and c parms
3.101 0.133         a and k default parms
0.  0.  0.          chip zero points
0.35                cosmic i'-z'
z        
0.013  .004          b and c parms
4.046 0.123         a and k default parms
0.  0.  0.          chip zero points
0.35                cosmic i'-z'
Gred      
0.  -.009           transformation coeff is 0. by definition
5.722 .276            a and k default parms
0.  0.  0.          chip zero points
1.11                cosmic g'-r'
D51     
0.  -.012           transformation coeff is 0. by definition
5.040 0.200           a and k default parms
0.  0.  0.          chip zero points
1.11                cosmic g'-r'