Cumulative log N(>S) − log S distributions for RASS data in the Orion vicinity. A field centered on the Galactic plane is shown with a dotted line. The dashed line includes Orion and a section of the Gould Belt. The solid line corresponds to the prediction of our X-ray models at l_II = 200° and zero Galactic latitude. The RASS completeness limit of 0.03 cnts/s is marked with the double arrow.