Chandra-LETGS X-ray observation of α Centauri: A nearby (G2V + K1V) binary system A. J. J. Raassen, J.-U. Ness, R. Mewe, R. L. J. van der Meer, V. Burwitz and J. S. Kaastra A&A, 400 2 (2003) 671-678 Published online: 03 March 2003 DOI: 10.1051/0004-6361:20021899