References

 
• Begelman, M. C. 2002, ApJ, 568, L97 NASA ADS  
• Binney, J., & Tremaine, S. 1987, Galactic dynamics (Princeton University Press, Princeton)  
• Cappi, M., Di Cocco, G., Panessa, F., et al. 2002, Proc. Symp. New Visions of the X-ray Universe in the XMM-Newton and Chandra era [astro-ph/0202245]  
• Colbert, E. J. M., & Mushotzky, R. F. 1999, ApJ, 519, 89 NASA ADS  
• Cotton, W. D., Condon, J. J., & Arbizzani, E. 1999, ApJS, 125, 409 NASA ADS  
• Di Cocco, G., Cappi, M., Trifoglio, M., et al. 2000, Amer. Astron. Soc., HEAD Meet., 32  
• Ebisawa, K., Titarchuk, L., & Chakrabarti, S. K. 1996, PASJ, 48, 59 NASA ADS  
• Ehle, M., Breitfellner, M., Dahlem, M., et al. 2001, XMM-Newton User's Handbook Issue 2.0. ESA XMM-SOC  
• Evans, I. N., Koratkar, A. P., Storchi-Bergmann, T., et al. 1996, ApJS, 105, 93 NASA ADS  
• Fabbiano, G. 1989, ARA&A, 27, 87 NASA ADS  
• Fabbiano, G., Trinchieri, G. & Van Speybroeck, L. S. 1987, ApJ, 316, 127 NASA ADS  
• Fabbiano, G., Zezas, A., & Murray, S. S. 2001, ApJ, 554, 1035 NASA ADS  
• Foschini, L., Di Cocco, G., Dadina, M., et al. 2002, Proc. Symp. New Visions of the X-ray Universe in the XMM-Newton and Chandra era [astro-ph/0202247]  
• Georganopoulos, M., Aharonian, F. A., & Kirk, J. G. 2002, A&A, 388, L25 NASA ADS  
• Ghizzardi, S. 2001, In flight calibration of the PSF for the MOS1 and MOS2 cameras, EPIC-MCT-TN-011 (Internal report)  
• Jacoby, G. H., Ciardullo, R., & Harris, W. E. 1996, ApJ, 462, 1 NASA ADS  
• Jansen, F., Lumb, D., Altieri, B., et al. 2001, A&A, 365, L1 NASA ADS  
• Halderson, E. L., Moran, E. C., Filippenko, A. V., et al. 2001, ApJ, 122, 637  
• Hasinger, G., Altieri, B., Arnaud, M., et al. 2001, A&A, 365, L45 NASA ADS  
• Ho, L. C., Feigelson, E. D., Townsley, L. K., et al. 2001, ApJ, 549, L51 NASA ADS  
• Ho, L. C., Filippenko, A. V., & Sargent, W. L. W. 1997a, ApJS, 112, 315 NASA ADS  
• Ho, L. C., Filippenko, A. V., & Sargent, W. L. W. 1997b, ApJ, 487, 568 NASA ADS  
• Ho, L. C., & Ulvestad, J. S. 2001, ApJS, 133, 77 NASA ADS  
• Howk, J. C., & Savage, B. D. 1999, AJ, 117, 2077 NASA ADS  
• King, A. R., Davies, M. B., Ward, M. J., et al. 2001, ApJ, 552, L109 NASA ADS  
• Kissler-Patig, M., Ashman, K. M., Zepf, S. E., et al. 1999, AJ, 118, 197 NASA ADS  
• Körding, E., Falcke, H., & Markoff, S. 2002, A&A, 382, L13 NASA ADS  
• La Parola, V., Peres, G., Fabbiano, G., et al. 2001, ApJ, 556, 47 NASA ADS  
• Lumb, D.H. 2002, Proc. Symp. New Visions of the X-ray Universe in the XMM-Newton and Chandra era [astro-ph/0203278]  
• Makishima, K., Kubota, A., Mizuno, T., et al. 2000, ApJ, 535, 632 NASA ADS  
• Mirabel, I. F., & Rodríguez, L. F. 1999, ARA&A, 37, 409 NASA ADS  
• Mitsuda, K., Inoue, H., Koyama, K., et al. 1984, PASJ, 36, 741 NASA ADS  
• Mizuno, T., Ohnishi, T., Kubota, A., et al. 1999, PASJ, 51, 663 NASA ADS  
• Nowak, M. A. 1995, PASP, 107, 1207 NASA ADS  
• Pakull, M. W., & Mirioni, L. 2002, Proc. Symp. New Visions of the X-ray Universe in the XMM-Newton and Chandra era [astro-ph/0202488]  
• Pappa, A., Georgantopoulos, I., Stewart, G. C., et al. 2001, MNRAS, 326, 995 NASA ADS  
• Pogge, R. W., & Eskridge, P. B. 1993, AJ, 106, 1405 NASA ADS  
• Read, A. M., Ponman, T. J., & Strickland, D. K. 1997, MNRAS, 286, 626 NASA ADS  
• Roberts, T. P., Goad, M. R., Ward, M. J., et al. 2001, MNRAS, 325, L7 NASA ADS  
• Roberts, T. P., & Warwick, R. S. 2000, MNRAS, 315, 98 NASA ADS  
• Strüder, L., Briel, U., Dennerl, K., et al. 2001, A&A, 365, L18 NASA ADS  
• Sunyaev, R. A., & Titarchuk, L. G. 1980, A&A, 86, 121 NASA ADS  
• Supper, R., Hasinger, G., Pietsch, W., et al. 1997, A&A, 317, 328 NASA ADS  
• Terashima, Y., & Wilson, A. S. 2002, Proc. Symp. New Visions of the X-ray Universe in the XMM-Newton and Chandra era [astro-ph/0204321]  
• Turner, M. J., Abbey, A., Arnaud, M., et al. 2001, A&A, 365, L27 NASA ADS  
• Vogler, A., Pietsch, W., & Kahabka, P. 1996, A&A, 305, 74 NASA ADS  
• Wang, Q. D. 2002, MNRAS, 332, 764 NASA ADS  
• Zezas, A., Fabbiano, G., Prestwich, A., et al. 2001 [astro-ph/0109302]