RX J0640-24 rapidly fading As reported already, the presumable superoutburst of RX J0640-24 has entered the rapid decline stage. The rate of decline, the duration of the plateau phase, the rate of rapid decline are all characteristic to those of superoutbursts. Thanks to all observers who have contributed important data, and took time-series photometry. Regards, Taichi Kato VSNET Collaboration team