File:Sp 15april2002 000000to000500 hsi mtpow thick2 albedo 5to60keV d4f.jpg

RHESSI count flux spectrum for the five-minute time interval shown in Figure 1. The black histogram is the background-subtracted count flux in the front segment of Detector #4. The red histogram is the function that was fitted to the data between 6 and 50 keV. It is the sum of the following components: a multi-thermal bremsstrahlung function (green), a power-law nonthermal thick-target function (yellow), an albedo function for isotropic emission (pink), the estimated pulse pile-up contribution (purple), and two Gaussian instrumental lines (olive and brown). The background spectrum (green) determined from the nighttime period immediately prior to the are is shown with +/-1 sigma error bars. The values of all parameters used for the fit are given for each functional component.