STRUCT       SecFilt
EXTNAME      DVO_SECFILT
TYPE         BINTABLE
SIZE         12
DESCRIPTION  DVO SecFilt : Secondary Filter Data 

# elements of data structure / FITS table
FIELD  M_PS,  MAG,      float,                other mags,       mags
FIELD  dM_PS, MAG_ERR,  float,                scatter on mag,   mags
FIELD  Xm,    MAG_CHI,  short,                chisq on mag,     [100*log(value)]
FIELD  dummy, JUNK,     short,                place holder
