Sebastien
Of course the Vizier people can use redirects if they want, it is quite legal. It is also legal to make a cone search which never returns more than three sources, or one that returns an error for every possible request.
I have done a rough timing test of Vizier cone searches, and I find that the redirect costs about 0.5 seconds per cone search. In other words, a Vizier service will be quite a bit faster if you simply replace up front the string "vizier" with "webviz" in all the accessURLs that you get from the registry. Since Vim runs hundreds of cone searches at a time, this is what I have chosen to do, to save a few minutes of my customer's valuable time.
Roy
-- California Institute of Technology 626 395 3670Received on 2008-06-04Z19:52:05