X-ray spectroscopy and photometry of the long-period polar AI Trianguli with XMM-Newton I. Traulsen, K. Reinsch, R. Schwarz, S. Dreizler, K. Beuermann, A. D. Schwope and V. Burwitz A&A, 516 (2010) A76 Published online: 14 July 2010 DOI: 10.1051/0004-6361/200913201