http://archive.noao.edu/nvo/usno.php?cat=a&amp;
http://gsss.stsci.edu/webservices/vo/ConeSearch.aspx?CAT=GSC23&amp;
http://irsa.ipac.caltech.edu/cgi-bin/Oasis/CatSearch/nph-catsearch?CAT=fp_psc&amp;
http://vizier.u-strasbg.fr/viz-bin/votable/-A?-source=I/220/out&amp;
http://vizier.u-strasbg.fr/viz-bin/votable/-A?-source=I/243/out&amp;
http://vizier.u-strasbg.fr/viz-bin/votable/-A?-source=I/252/out&amp;
http://vizier.u-strasbg.fr/viz-bin/votable/-A?-source=I/254/out&amp;
http://vizier.u-strasbg.fr/viz-bin/votable/-A?-source=I/255/out&amp;
http://vizier.u-strasbg.fr/viz-bin/votable/-A?-source=I/284/out&amp;
http://vizier.u-strasbg.fr/viz-bin/votable/-A?-source=II/246/out&amp;
http://vo.astronet.ru/sai_cas/conesearch?cat=sdssdr7&amp;tab=field&amp;
http://vo.astronet.ru/sai_cas/conesearch?cat=sdssdr7&amp;tab=photoobjall&amp;
http://vo.astronet.ru/sai_cas/conesearch?cat=sdssdr7&amp;tab=phototag&amp;
http://vo.astronet.ru/sai_cas/conesearch?cat=sdssdr7&amp;tab=specobjall&amp;
http://vo.astronet.ru/sai_cas/conesearch?cat=sdssdr7&amp;tab=specphotoall&amp;
http://vo.astronet.ru/sai_cas/conesearch?cat=sdssdr7&amp;tab=sppparams&amp;
http://vo.astronet.ru/sai_cas/conesearch?cat=twomass&amp;tab=psc&amp;
http://vo.astronet.ru/sai_cas/conesearch?cat=twomass&amp;tab=xsc&amp;
http://vo.astronet.ru/sai_cas/conesearch?cat=usnoa2&amp;tab=main&amp;
http://vo.astronet.ru/sai_cas/conesearch?cat=usnob1&amp;tab=main&amp;
http://wfaudata.roe.ac.uk/sdssdr7-dsa/DirectCone?DSACAT=SDSS_DR7&amp;DSATAB=Galaxy&amp;
http://wfaudata.roe.ac.uk/sdssdr7-dsa/DirectCone?DSACAT=SDSS_DR7&amp;DSATAB=PhotoObj&amp;
http://wfaudata.roe.ac.uk/sdssdr7-dsa/DirectCone?DSACAT=SDSS_DR7&amp;DSATAB=PhotoObjAll&amp;
http://wfaudata.roe.ac.uk/sdssdr7-dsa/DirectCone?DSACAT=SDSS_DR7&amp;DSATAB=Star&amp;
http://wfaudata.roe.ac.uk/sdssdr8-dsa/DirectCone?DSACAT=SDSS_DR8&amp;DSATAB=PhotoObjAll&amp;
http://wfaudata.roe.ac.uk/sdssdr8-dsa/DirectCone?DSACAT=SDSS_DR8&amp;DSATAB=SpecObjAll&amp;
http://wfaudata.roe.ac.uk/twomass-dsa/DirectCone?DSACAT=TWOMASS&amp;DSATAB=twomass_psc&amp;
http://wfaudata.roe.ac.uk/twomass-dsa/DirectCone?DSACAT=TWOMASS&amp;DSATAB=twomass_xsc&amp;
http://www.nofs.navy.mil/cgi-bin/vo_cone.cgi?CAT=USNO-A2&amp;
http://www.nofs.navy.mil/cgi-bin/vo_cone.cgi?CAT=USNO-B1&amp;
