vagc

The vagc page is here

Select LRG spectra objects, SDSS I/II

To select a sample of SDSS I/II lrgs from the vagc, along with imaging info, look at these catalogs:

• • $VAGC_REDUX/

    • object_sdss_imaging.fits: some photometric catalog data for all of the objects in the catalog

    • object_sdss_spectro.fits: spectroscopic catalog data for all of the objects

Then apply these cuts to the spectro catalog:

wlrg = where($ struct.specprimary EQ 1 $ and strmatch(struct.progname,'main*') $ and (struct.primtarget AND 2L^5 + 2L^26) NE 0 $ and strmatch(struct.class,'GALAXY*') $ and struct.zwarning EQ 0, nw)

It is often recommended to choose z > 0.15 also