java -jar stilts.jar tpipe in='http://vizier.u-strasbg.fr/viz-bin/votable/-A?-source=II/246&-out.max=unlimited&verb=3&RA=127.5&DEC=+1.5&SR=0.2333333' out=2mass.xml

    java -jar stilts.jar tpipe in='http://vizier.u-strasbg.fr/viz-bin/votable/-A?-source=V/139&-out.max=unlimited&verb=3&RA=127.5&DEC=+1.5&SR=0.2333333' out=sdssdr9.xml

    java -jar stilts.jar tskymatch2 ifmt1=votable in1=2mass.xml ifmt2=votable in2=sdssdr9.xml ra1=RAJ2000 dec1=DEJ2000 ra2=RAJ2000 dec2=DEJ2000 error=4 find=best join=1and2 ofmt=votable out=cross.xml

    java -jar stilts.jar tpipe ifmt=votable in=cross.xml cmd='select "cl == 6&&umag>22.0&&gmag>22.2&&Jmag-Hmag<0.3&&Hmag-Kmag<0.3 "' ofmt=votable out=candidate.xml