The DESI DR9 seed catalog, 'seedcat2.fits',  contain the following information.

RA DESI ra deg
DEC DESI dec deg
TYPE DESI type
MAG_G DESI g-band mag
MAG_G_ERR DESI g-band mag error
MAG_R DESI r-band mag
MAG_R_ERR DESI r-band mag error
MAG_Z DESI z-band mag
MAG_Z_ERR DESI z-band mag error
MAG_W1 WISE W1-band mag
MAG_W1_ERR WISE W1-band mag error
MAG_W2 WISE W2-band mag
MAG_W2_ERR WISE W2-band mag error
EXT_G g galactic extinction
EXT_R r galactic extinction
EXT_Z z galactic extinction
EXT_W1 W1 galactic extinction
EXT_W2 W2 galactic extinction
SERSIC SERSIC index
SERSIC_ERR SERSIC index error
SHAPE_R effective radius
SHAPE_R_ERR effective radius error
SHAPE_E1 shape e1
SHAPE_E1_ERR shape e1 error
SHAPE_E2 shape e2
SHAPE_E2_ERR shape e2 error
DEPTH_G g-band magnitude limit
DEPTH_R r-band magnitude limit
DEPTH_Z z-band magnitude limit
DEPTH_W1 W1-band magnitude limit
DEPTH_W2 W2-band magnitude limit
SEPARATION  not used, 0
REDSHIFT redshift of the galaxy


The corresponding slitless redshift is provided in the 'slit_seed.fits'.