References

 
• Barlow, R. J. 1989, in Statistics: A Guide to the Use of Statistical Methods in the Physical Sciences (John Wiley & Sons)  
• Blandford, R. D., & K $\ddot{{\rm o}}$nigl, A. 1979, ApJ, 232, 34 NASA ADS  
• Brocksopp, C., Fender, R. P., Larionov, V., et al. 1999, MNRAS, 309, 1063 NASA ADS  
• Belloni, T., Méndez, M., van der Klis, M., Lewin, W. H. G., & Dieters, S. 1999, ApJ, 519, L159 NASA ADS  
• Campana, S., & Stella, L. 2000, ApJ, 541, 849 NASA ADS  
• Chaty, S., Mirabel, I. F., Goldoni, P., et al. 2002, MNRAS, 331, 1065 NASA ADS  
• Choudhury, M., Rao, A. R., Vadawale, S. V., Ishwara-Chandra, C. H., & Jain, A. K. 2002, A&A, 383, L35 NASA ADS  
• Corbel, S., Fender, R. P., Tzioumis, A. K., et al. 2000, A&A, 359, 251 NASA ADS  
• Corbel, S., & Fender, R. P. 2002, ApJ, 573, L35 NASA ADS  
• Cowley, A. P., Schmidtke, P. C., Hutchings, J. B., & Crampton, D. 2002, AJ, 123, 1741 NASA ADS  
• Della Ceca, R., Pellegrini, S., Bassani, L., et al. 2001, A&A, 375, 781 NASA ADS  
• Done, C. 2002, Philosophical Transactions of the Royal Society (Series A: Mathematical, Physical, and Engineering Sciences), submitted [astro-ph/0203246]  
• Falcke, H., & Biermann, P. L. 1996, A&A, 308, 321 NASA ADS  
• Fender, R. P., Corbel, S., Tzioumis, A. K., et al. 1999, ApJ, 519, L165 NASA ADS  
• Fender, R. P. 2001, MNRAS, 322, 31 NASA ADS  
• Feng, Y. X., Zhang, S. N., Sun, X., et al. 2001, ApJ, 553, 394 NASA ADS  
• Gallo, E., Fender, R. P., & Pooley, G. 2002, Proc. of the 4th Microquasar Workshop, ed. Ph. Durouchoux, Y. Fuchs, & J. Rodriguez [astro-ph/0207551]  
• Garcia, M. R., McClintock, J. E., Narayan, R., et al. 2001, ApJ, 553, L47 NASA ADS  
• Georganopoulos, M., Aharonian, F. A., & Kirk, J. G. 2002, A&A, 388, L25 NASA ADS  
• Hannikainen, D. C., Hunstead, R. W., Campbell-Wilson, D., & Sood, R. K. 1998, A&A, 337, 460 NASA ADS  
• Klein-Wolt, M., Fender, R. P., Pooley, G. G., et al. 2002, MNRAS, 331, 745 NASA ADS  
• Kong, A. K. H., Kuulkers, E., Charles, P. A., & Homer, L. 2000, MNRAS, 312, L49 NASA ADS  
• Markert, T. H., Canizares, C. R., Clark, G. W., et al. 1973, ApJ, 184, L67 NASA ADS  
• Markoff, S., Falcke, H., & Fender, R. 2001, A&A, 372, L25 NASA ADS  
• Markoff, S., Nowak, M., Corbel, S., Fender, R., & Falcke, H. 2003, A&A, 397, 645 NASA ADS  
• McCollough, M. L., Robinson, C. R., Zhang, S. N., et al. 1999, ApJ, 517, 951 NASA ADS  
• Mitsuda, K., Inoue, H., Koyama, K., et al. 1984, PASJ, 36, 741 NASA ADS  
• Nowak, M. A., Wilms, J., & Dove, J. B. 2002, MNRAS, 332, 856 NASA ADS  
• Shahbaz, T., Fender, R., & Charles, P. A. 2001, A&A, 376, L17 NASA ADS  
• Smith, I. A., & Liang, E. P. 1999, ApJ, 519, 771 NASA ADS  
• Stirling, A. M., Spencer, R. E., de la Force, C. J., et al. 2001, MNRAS, 327, 1273 NASA ADS  
• Wardzniski, G., Zdziarski, A. A., Gierlinski, M., et al. 2003, MNRAS, in press [astro-ph/0207598]  
• Wilms, J., Nowak, M. A., Dove, J. B., Fender, R. P., & di Matteo, T. 1999, ApJ, 522, 460 NASA ADS