See the procedure UVBYBETA for more info.
LING SEQUENCE:
deredd, eby, by, m1, c1, ub, by0, m0, c0, ub0, /UPDATE
UTS:
Eby - color index E(b-y),scalar (E(b-y) = 0.73*E(B-V) )
by - b-y color (observed)
m1 - Stromgren line blanketing parameter (observed)
c1 - Stromgren Balmer discontinuity parameter (observed)
ub - u-b color (observed)
These input values are unaltered unless the /UPDATE keyword is set
PUTS:
by0 - b-y color (dereddened)
m0 - Line blanketing index (dereddened)
c0 - Balmer discontinuity parameter (dereddened)
ub0 - u-b color (dereddened)
IONAL INPUT KEYWORDS:
/UPDATE - If set, then input parameters are updated with the dereddened
values (and output parameters are not used).
ISION HISTORY:
Adapted from FORTRAN routine DEREDD by T.T. Moon
W. Landsman STX Co. April, 1988
Converted to IDL V5.0 W. Landsman September 1997