STRUCT       SecFilt
EXTNAME      DVO_SECFILT
TYPE         BINTABLE
SIZE         18
DESCRIPTION  DVO SecFilt : Secondary Filter Data 

# elements of data structure / FITS table
FIELD  M,     MAG,      float,                other mags,       mags
FIELD  dM,    MAG_ERR,  float,                scatter on mag,   mags
FIELD  Xm,    MAG_CHI,  short,                chisq on mag,     [100*log(value)]
FIELD  Ncode, NCODE,    short,                number of detections in band
FIELD  Nused, NUSED,    short,                number of detections used in average
FIELD  M_20,  MAG_20,   short,                lower 20percent mag,      millimags
FIELD  M_80,  MAG_80,   short,                upper 20percent mag,      millimags

# *** 20090206 : new fields : M_20, M_80; dropped dummy
