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Fungueiri\\~no, J. Rochet, J. Saborido, J. Schacher, J. Smolik, K. Gritsay, K. Okada, L. Afanasyev, L. Kruglova, L. Nemenov, L. Tauscher, M. Chiba, M. Duma, M. Gugiu, M. Hansroul, M. Iliescu, M. Kobayashi, M. Nikitin, M. Pentia, M. Pl\\'o, M. Zhabitsky, O. Gorchakov, O. V\\'azquez Doce, P. Chliapnikov, P. Levi Sandri, P. Zrelov, R. Lednicky, S. Constantinescu, S. Horikawa, S. Sugimoto, S. Trusov, T. Cechak, T. Trojek, T. Vrba, V. Brekhovskikh, V. Karpukhin, V. Komarov, V. Kruglov, V. Lapshin, V. Lucherini, V. Olchevskii, V. Ronjin, V. Rykalin, V. Utkin, V. Yazkov, Y. Allkofer, Y. Yoshimura, Z. Hons","submitted_at":"2009-05-01T15:23:35Z","abstract_excerpt":"We present evidence for the first observation of electromagnetically bound $\\pi^\\pm K^\\mp$-pairs ($\\pi K$-atoms) with the DIRAC experiment at the CERN-PS. 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