filtercode	a_0		a_1		a_2		a_3	
u		+0.04438	-2.26095	-0.13387	+0.27099	
g		-0.01808	-0.13595	+0.01941	-0.00183	
r		-0.01836	-0.03577	+0.02612	-0.00558	
i		+0.01170	-0.00400	+0.00066	-0.00058	
z		-0.01062	+0.07529	-0.03592	+0.00890	
y		+0.08924	-0.20878	+0.10360	-0.02441