Set upper limits error bars in show_spectrum.py to fraction of flux

Jürgen Knödlseder
1 parent ed0d4b4b
Showing 1 changed file with 5 additions and 2 deletions
examples/show_spectrum.py
@@ -2,7 +2,7 @@
 # ==========================================================================
 # Display spectrum generated by csspec
 #
-# Copyright (C) 2015-2016 Juergen Knoedlseder
+# Copyright (C) 2015-2017 Juergen Knoedlseder
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -91,6 +91,9 @@ def plot_spectrum(filename, plotfile):
             ul_ed_engs.append(c_ed.real(row))
             ul_eu_engs.append(c_eu.real(row))
  
+    # Set upper limit errors
+    yerr = [0.6 * x for x in ul_flux]
+
     # Plot the spectrum 
     plt.figure()
     plt.loglog()
@@ -98,7 +101,7 @@ def plot_spectrum(filename, plotfile):
     plt.errorbar(energies, flux, yerr=e_flux, xerr=[ed_engs, eu_engs],
                  fmt='ro')
     plt.errorbar(ul_energies, ul_flux, xerr=[ul_ed_engs, ul_eu_engs],
-                 yerr=1.0e-11, uplims=True, fmt='ro')
+                 yerr=yerr, uplims=True, fmt='ro')
     plt.xlabel('Energy (TeV)')
     plt.ylabel(r'E $\times$ dN/dE (erg cm$^{-2}$ s$^{-1}$)')