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The Swift Mission UK involvement Instruments
GRBs before Swift GRBs in the Swift era Non-GRB science with Swift GRB research at Leicester
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Data Analysis
Data analysis overview Swift software
Build XRT products
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GRB Products
Full dataset Swift XRT products for GRBs XRT positions XRT light curves XRT spectra XRT GRB catalogue XRT GRB images Burst analyser Prompt dataset GRB field info XRT prompt analysis
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Calculate Galactic N_H

This tool returns the Galactic column density of Hydrogen, using the method of Willingale et al. 2013. 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.