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Calculate Galactic NH

This tool returns the Galactic column density of Hydrogen, using the method of Willingale et al. 2013, also described on Dick Willingale's web site. See the online documentation for more information.

Please either enter the coordinates of your source in the box below, or you can upload a file of multiple positions. This should contain one position per line, and the line should be of the form, "RA Dec Equinox". The Equinox is optional and is assumed to be J2000 unless stated. Coordinates can be sexagesimal or decimal.

Source position(s)