X-ray luminosities of known members of η Chamaleontis in the energy band 0.3−8.0 keV. Circles are known classical T Tauri stars, triangles are transitional objects, and squares are stars with no signatures of accretion disks. Filled symbols indicate stars that underwent a flare during our observation. Binary systems are marked with a large circle. Note that RECX 12 was observed, probably, in flare state during the exposure but was not clearly detected in its light curve because of its low count-rate (see Sect. 3.1).