sdssdr2 | Sloan Digitized Sky Survey                | photoprimary   | 1 | ra,dec,i,g,r,u,z                       | http://openskyquery.net/nodes//SDSSDR2/nodeb.asmx 
usnob   | USNO-B                                    | photoprimary   | 1 | ra,dec,r1mag,r2mag,b1mag               | http://openskyquery.net/nodes/usnob/nodeb.asmx
galex   | GalEX                                     | photoprimary   | 1 | ra,dec,fuv_mag,nuv_mag                 | http://galex.stsci.edu/skynode/ogalex/nodeb.asmx 
twomass | 2 Micron All Sky Survey                   | photoprimary   | 1 | ra,dec,j_m,h_m,k_m                     | http://openskyquery.net/nodes/TWOMASS/nodeb.asmx 
first   | FIRST                                     | photoprimary   | 2 | ra,dec,fpeak,fint                      | http://openskyquery.net/nodes/FIRST/nodeb.asmx 
rassfsc | ROSAT All-Sky Survey Faint Source Catalog | heasarc_rassfsc|20 | ra,dec,count_rate,hardness_ratio_1     | http://skyview.gsfc.nasa.gov:8080/axis/services/SkyNodeSoap
wgacat  | WGA Catalog of ROSAT pointed observations | heasarc_wgacat | 5 | ra,dec,count_rate                      | http://skyview.gsfc.nasa.gov:8080/axis/services/SkyNodeSoap 
ssc     | XMM Serendipitous Source Catalog          | heasarc_xmmssc | 3 | ra,dec,ep_flux,m1_flux,m2_flux         | http://skyview.gsfc.nasa.gov:8080/axis/services/SkyNodeSoap
optical | HEASARC Optical catalog                   | heasarc_optical| 2 | ra,dec,name                            | http://skyview.gsfc.nasa.gov:8080/axis/services/SkyNodeSoap