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Rapid Variations in RS Oph Observed by OMC/INTEGRAL

Hudec, R.; Hroch, F.; Simon, V.

XX Ophiuchi in Deep Minimum after 37 Years

Sobotka, P.

XX Ophiuchi is a unique object, which is very difficult to classify. This star only slowly varied around the maximum magnitude (V approx 9 mag) during the past 37 years. In March 2004, the brightness started to fade by 0.2 mag per month. I stress the urgent need of the spectroscopic observations during this minimum.