Fig. 3.
Population synthesis of nova events in a Milky Way-like galaxy. Left: year 116.3 of the modelled Poisson process, where a nearby CO nova at (l, b) = (+123° , + 8° ) outshines the remaining galaxy in 478 keV emission (top). At the same time, 1275 keV emission is not enhanced (bottom). The angular resolution is chosen according to the SPI 2.7° (FWHM). Right: time profiles (light curves) of the 478 keV and 1275 keV since the beginning of the synthesis for a duration of ∼150 yr. This timescale is enough to reach convergence and to show characteristic features. The vertical purple line indicates the time shown in the plots on the left.
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