Calibration and in-orbit performance of the reflection grating spectrometer onboard XMM-Newton C. P. de Vries, J. W. den Herder, C. Gabriel, R. Gonzalez-Riestra, A. Ibarra, J. S. Kaastra, A. M. T. Pollock, A. J. J. Raassen and F. B. S. Paerels A&A, 573 (2015) A128 Published online: 12 January 2015 DOI: 10.1051/0004-6361/201423704