Steps toward Determination of the Size and Structure of the Broad‐Line Region in Active Galactic Nuclei. XVI. A 13 Year Study of Spectral Variability in NGC 5548
B. M. Peterson, P. Berlind, R. Bertram, K. Bischoff, N. G. Bochkarev, N. V. Borisov, A. N. Burenkov, M. Calkins, L. Carrasco, V. Chavushyan, R. Chornock, M. Dietrich, Victor Doroshenko, O. V. Ezhkova, Alexei V Filippenko, A. Gilbert, J. P. Huchra, W. Kollatschny, Douglas C. Leonard, Wenyu Li, V. M. Lyuty, Yu. F. Malkov, T. Matheson, N. I. Merkulova, V. P. Mikhailov, M. Modjaz, Christopher A. Onken, Richard W. Pogge, V. I. Pronik, B. C. Qian, P. Romano, С. Г. Сергеев, Е. А. Сергеева, A. I. Shapovalova, O. I. Spiridonova, Jun Tao, S. Tokarz, J. R. Valdés, В. В. Власюк, R. M. Wagner, B. J. Wilkes (2002). Steps toward Determination of the Size and Structure of the Broad‐Line Region in Active Galactic Nuclei. XVI. A 13 Year Study of Spectral Variability in NGC 5548. , 581(1), DOI: https://doi.org/10.1086/344197.
