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Table 1:

Previously known parameters for the studied sources.

Object
WFC fluxa ROSAT fluxb Redshiftc

J1539
0.82 1.68 d,e 0.0728 d
    2.49 f  
J1601 1.28 2.41 f 0.1530 g
J0812 1.14 3.93 f 0.0620 g

Notes. (a) 2-10 keV, 10-14 W m-2 for Crab-like spectrum (i.e. a power law with a photon index of 2). (b) 0.1-2.4 keV, 10-14 W m-2. (c) Determined using optical spectroscopy. (d) From REFLEX (Böhringer et al. 2004). (e) Using a Raymond-Smith model (Raymond & Smith 1977). (g) From CIZA (Ebeling et al. 2002).


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