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First we load up the sky positions of our favorite targets, we will use one of
the examples. Use the menu option Load Sky Positions / From Link to VOTable. You should see a form titled "Get Positions from URL", and a link to examples -- bring up the examples,
preferably in a new window.
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Get the URL for the table 51 Candidate Low-Luminosity Hard X-Ray Binaries (Suchov et al, 2004). On the Mac, use Ctrl-click on the link, then "Copy link location". Paste that into the URL box.
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You should see the URL like this, then submit the form.
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The data table comes up with position (choose degrees/sexg with Utility / Sex degrees).
You can sort on the table by clicking on the column header.
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Now let us crossmatch our sources with one of the catalogs from the VO library.
For this, we start with a proximity search -- find all catalog entries close to one of our
chosen sources.
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From the proximity search pull-down menu, we select the XMM-Newton master archive, and insert
a search radius, in this case 120 arc seconds. Give the table a new name, perhaps "xmm".
This will return a list of observing targets from the XMM X-ray observatory.
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The new table comes up with no columns selected, and so only a count of the number of matches
is shown instead. Use Table Columns / xmm if you called your table "xmm".
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Check whichever columns are interesting, for the purposes of this example, make sure that
pi_lname and pi_fname are checked. Click at the top of the frame to view the
workbench with the new columns selected. Now you can see who has been using XMM to observe
your chosen sources.
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Now we see who is observing these sources -- of course it is all a matter of public record anyway.
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