Welcome to the Terzan 5 reddening calculator. This tool allows you to obtain the average colour excess E(B-V) along the line of sight of Terzan 5, in 25 x 25 cells of 8'' x 8'' each, for a total field of view of 200'' x 200'' (see Massari et al. 2012, ApJ, 755, 32).
Just insert the RA and Dec coordinates of your point of interest and then click the 'Calculate' button.
Input format is in degrees and limits are: 266.97000 < RA < 267.04000 and -24.81000 < Dec < -24.75000.



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The related paper (Massari et al. 2012, ApJ, 755, 32) can be found here