Selecting Background for RHESSI Spectra

Options for choosing Background when fitting RHESSI Spectra

Introduction

Before a fit is done for a selected time interval using a RHESSI Spectrum file background must be selected. There are two types of background that need to be subtracted from RHESSI spectra. The preflare solar background and the non-solar background. The preflare background is the solar activity measured by RHESSI before a flare be gins or after it ends. The non-solar background is primarily due to cosmic-ray interactions with the spacecraft, the spacecraft passing through the South Atlantic Anomaly, or electron precipitation events from the outer radiation belt.

Methods for selecting Background

Using a single interval as background for all intervals to fit

This is the simplest method for selecting background. The basics are described in OSPEX Documentation.

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