References

• Abell G.O., Corwin H.G., Olowin R.P., 1989, ApJS 70, 1 NASA ADS
• Allen S.W., Fabian A.C., 1998, MNRAS 297, L57 NASA ADS
• Arnaud M., Evrard A.E., 1999, MNRAS 305, 631 NASA ADS
• Bender R., Moellenhof C., 1987, A&A 177, 71 NASA ADS
• Cavaliere A., Fusco-Femiano R., 1976, A&A 49, 137 NASA ADS
• Dickey J.M., Lockman F.J., 1990, ARA&A 28, 215 NASA ADS
• Ebeling H., Voges W., Böhringer H., et al., 1996, MNRAS 281, 799 NASA ADS
• Ebeling H., Edge A.C., Böhringer H., et al., 1998, MNRAS 301, 881 NASA ADS
• Eskridge P.B., Fabbiano G., Kim D.-W., 1995, ApJS 97, 141 NASA ADS
• Ettori S., Fabian A.C., 1999, MNRAS 305, 834 NASA ADS
• Felenbok P., Gúerin J., Fernandez A., et al., 1997, Exp. Astron. 7, 65
• Friedrich P., Hasinger G., Richter G., et al., 1996, in: proceedings of the conference "Röntgenstrahlung from the universe'', MPE Report 263, Zimmermann H.U., Trümper J.E., Yorke H. (eds.), p. 681
• Fukazawa Y., Makishima K., Tamura T., et al., 1998, PASJ 50, 187 NASA ADS
• Girardi M., Giuricin G., Mardirossian F., Mezzetti M., Boschin W., 1998, ApJ 505, 74 NASA ADS
• Irwin J.A., Sarazin C.L., 1998, ApJ 499, 650 NASA ADS
• Jones C., Forman W., 1984, AJ 276, 38
• Pildis R.A., Bregman J.N., Evrard A.E., 1995, ApJ 443, 514 NASA ADS
• Ponman T.J., Bourner P.D.J., Ebeling H., Böhringer H., 1996, MNRAS 283, 690 NASA ADS
• Postman M., Lauer T.R., 1995, ApJ 440, 28 NASA ADS
• Markevitch M., 1998, ApJ 504, 27 NASA ADS
• Mohr J.J., Mathiesen B., Evrard A.E., 1999, ApJ 517, 627 NASA ADS
• Mushotzky R.F., Scharf C.A., 1997, ApJ 482, L13 NASA ADS
• Reiprich T.H., Böhringer H., 1999, in: Proceedings of the 4 $^{{\rm th}}$ ASCA Symposium on Heating and Acceleration in the Universe held in Tokyo, Japan, Inoue H., Ohashi T., Takahashi T. (eds.) (in press)
• Schindler S., 1999, A&A 349, 435 NASA ADS
• Schindler S., Müller E., 1993, A&A 272, 137 NASA ADS
• Schindler S., Wambsganss J., 1996, A&A 313, 113 NASA ADS
• Schindler S., Belloni P., Ikebe Y., et al., 1998, A&A 338, 843 NASA ADS
• Snowden S.L., 1998, ApJS 117, 233 NASA ADS
• Struble M.F., Rood H.J., 1987, ApJS 63, 543 NASA ADS
• Trümper J., 1983, Adv. Space Res. 2, 142
• Voges W., Boller T., Dennerl K., et al., 1996, in: Proceedings of the workshop Röntgenstrahlung from the universe, held in Würzburg, Germany, Zimmermann H.U., Trümper J.E., Yorke H. (eds.), MPE Report 263, p. 637
• White D.A., Jones C., Forman W., 1997, MNRAS 292, 419 NASA ADS
• Wu X.-P., Xue Y.-J., Fang L.-Z., 1999, astro-ph/9905106