X-RAY SHADOWS OF THE DRACO NEBULA : A NEW METHOD TO DETERMINE TOTAL HYDROGEN COLUMN DENSITIES

Peter Moritz, S. L. Snowden(Goddard Space Flight Center), R. Egger(Max Planck Society), U. Mebold(University of Bonn), A. Wennmacher(University of Cologne), U. Herbstmeier(Max Planck Institute for Astronomy)
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August 1, 1998
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