!# $B$ filter from Bessel (1990), PASP 102, 1181.
!# To use for all colors except $U-B$.
!# See also "B3_BK78.txt".
"B_B90"
"energy"       
"Vega"    0.
 3600.   0.000
 3700.   0.030
 3800.   0.134
 3900.   0.567
 4000.   0.920
 4100.   0.978
 4200.   1.000
 4300.   0.978
 4400.   0.935
 4500.   0.853
 4600.   0.740
 4700.   0.640
 4800.   0.536
 4900.   0.424
 5000.   0.325
 5100.   0.235
 5200.   0.150
 5300.   0.095
 5400.   0.043
 5500.   0.009
 5600.   0.000
