Do not use this service. We will soon completely shut it down, since it is no longer necessary and actually far more cumbersome than the TAP-based procedure for doing what this service did. See the Service Info for how to add extinction columns to your tables.
Enter positions within the LMC to obtain the extinction values. Note that no values will be returned for positions we do not have extinction values for.
If you have VOTable data, the crossmatch service with a sufficiently large search radius might work better for you.
If you use this data, please cite Haschke, R., Grebel, E., Duffau, S., 2011: "New Optical Reddening Maps of the Large and Small Magellanic Clouds", AJ 141, 158, 2011AJ....141..158H
The photometric data of the red clump is provided by the OGLE collaboration.
Part of this research was supported by SFB 881 "The Milky Way System".