Analytic, single scattering approximation of the 3–20 keV reflected X-ray intensity observed at time t = 320 yr for the three cloud models, discussed in the text, and for the case of a short (1 yr) and long (20 yr) flare. The source, located at l = 0°,b = 0°, illuminates the cloud from the left side in the above plots. The angular resolution used is of 1 arcsec. The intensity and column density profiles for the equatorial, vertical, and edge profiles indicated in the maps are shown in Figs. 12 and 13, respectively.