http://gsss.stsci.edu/webservices/vo/ConeSearch.aspx?CAT=GSC23&
http://vizier.unistra.fr/viz-bin/conesearch/I/220/out?
http://vizier.unistra.fr/viz-bin/conesearch/I/243/out?
http://vizier.unistra.fr/viz-bin/conesearch/I/252/out?
http://vizier.unistra.fr/viz-bin/conesearch/I/254/out?
http://vizier.unistra.fr/viz-bin/conesearch/I/255/out?
http://vizier.unistra.fr/viz-bin/conesearch/I/284/out?
http://vizier.unistra.fr/viz-bin/conesearch/I/345/gaia2?
http://vizier.unistra.fr/viz-bin/conesearch/II/246/out?
http://wfaudata.roe.ac.uk/sdssdr7-dsa/DirectCone?DSACAT=SDSS_DR7&DSATAB=Galaxy&
http://wfaudata.roe.ac.uk/sdssdr7-dsa/DirectCone?DSACAT=SDSS_DR7&DSATAB=PhotoObj&
http://wfaudata.roe.ac.uk/sdssdr7-dsa/DirectCone?DSACAT=SDSS_DR7&DSATAB=PhotoObjAll&
http://wfaudata.roe.ac.uk/sdssdr7-dsa/DirectCone?DSACAT=SDSS_DR7&DSATAB=Star&
http://wfaudata.roe.ac.uk/sdssdr8-dsa/DirectCone?DSACAT=SDSS_DR8&DSATAB=PhotoObjAll&
http://wfaudata.roe.ac.uk/sdssdr8-dsa/DirectCone?DSACAT=SDSS_DR8&DSATAB=SpecObjAll&
http://wfaudata.roe.ac.uk/twomass-dsa/DirectCone?DSACAT=TWOMASS&DSATAB=twomass_psc&
http://wfaudata.roe.ac.uk/twomass-dsa/DirectCone?DSACAT=TWOMASS&DSATAB=twomass_xsc&
http://astrometry.mit.edu/cgi-bin/vo_cone6.cgi?CAT=USNO-A2&
http://astrometry.mit.edu/cgi-bin/vo_cone6.cgi?CAT=USNO-B1&