Left: background-subtracted RHESSI photon flux spectrum (black) of the flare of 2011 Mar 24 fitted with an isothermal component (red) and a nonthermal photon power-law (blue). The spectrum was derived using all RHESSI detectors except for number 2 and 3. For comparison, the pre-event background (brown) is plotted as well. The fit results for emission measure EM, temperature T, and spectral index γ are indicated. Right: background-subtracted in situ electron spectrum of the 2011 Mar 24 event. The spectrum is constructed by the peak intensities of each energy channel (marked by circles in the top panel of Fig. 2). The line represents a broken-power law fit to the data.