3pow - Triple Power Law

From RHESSI Wiki

Contents 1 Triple Power Law 1.1 Introduction 1.2 Parameters 1.3 Fitting with 3pow

Triple Power Law

Introduction

The triple broken power law can be used to model the photon spectrum when there are two breaks in the non-thermal portion of the spectrum

Parameters

3pow - Triple broken power-law function with/without discontinuities in the derivatives

• a[0] - normalization at epivot, photon flux of first power-law at epivot
• a[1] - negative power law index below break energy one
• a[2] - break energy one (keV)
• a[3] - negative power law index above break energy two, below break energy two
• a[4] - break energy two (keV)
• a[5] - negative power law index above break energy two

Fitting with 3pow