varstr1=sprintf("<a href='http://skyserver.sdss.org/dr12/en/tools/explore/summary.aspx?ra=%g&dec=%g' target='_blank' title='View imaging for this object in the SDSS Explore service'>Explore</a>",ra,dec);
varstr1=sprintf("<a href='http://skyserver.sdss.org/dr14/en/tools/explore/summary.aspx?ra=%g&dec=%g' target='_blank' title='View imaging for this object in the SDSS Explore service'>Explore</a>",ra,dec);
varstr2=sprintf("<a href='http://irsa.ipac.caltech.edu/applications/finderchart/#id=Hydra_finderchart_finder_chart&RequestClass=ServerRequest&DoSearch=true&subsize=0.0166667&thumbnail_size=medium&sources=DSS,SDSS,twomass,WISE&UserTargetWorldPt=%s;%s;EQ_J2000&SimpleTargetPanel.field.resolvedBy=nedthensimbad&projectId=finderchart&searchName=finder_chart&isDrillDownRoot=true&isSearchResult=true' target='_blank' title='View imaging for this object in the IRSA Hydra finder chart service'>IRSA</a>",ra,dec);
varstr3=sprintf("<a href='http://simbad.u-strasbg.fr/simbad/sim-coo?output.format=HTML&Coord=%s+%s&Radius=10&Radius.unit=arcsec' target='_blank' title='Search around this position in the Simbad service'>Simbad</a>",ra,dec);
varstr4=sprintf("<a href='http://legacysurvey.org/viewer/?ra=%g&dec=%g&zoom=16&layer=sdssco' target='_blank' title='View imaging for this object on the legacysurey.org site'>legacy.org</a>",ra,dec);
varstr4=sprintf("<a href='http://legacysurvey.org/viewer/?ra=%g&dec=%g&zoom=16&layer=sdss2' target='_blank' title='View imaging for this object on the legacysurvey.org site'>legacysurvey</a>",ra,dec);