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J. Bechtold (University of Arizona), A. Siemiginowska (CXC, CFA), M. Elvis (CXC, CFA), T. L. Aldcroft (CXC, CFA), A. Dobrzycki (CXC, CFA)
We have observed three quasars, PKS 1127-143, Q 1331+171 and Q 0054+144, with ACIS aboard the Chandra X-ray Observatory, in order to measure soft X-ray absorption associated with intervening 21-cm and damped Ly-alpha absorbers. For PKS 1127-143, we detect absorption which, if associated with the intervening z(abs)=0.312 absorber, implies a metallicity of 1/5 solar. The advantage of the X-ray measurement is that the derived metallicity is insensitive to ionization, inclusion of an atom in a molecule, or depletion onto dust grains. The X-ray absorption is mostly due to oxygen, and agrees with the oxygen abundance of 16-40 percent solar derived from nebular emission lines in a foreground galaxy at the redshift of the absorber. The observations of the other two absorbers will also be presented.