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23 July 2002. Brian Dennis NASA/GSFC 26 July 2013. 23 July 2002. 23 July 2002. 23 July 2013 A1 and A3 Attenuator States. Note 3 distinct peaks. 23 July 2002. 2vth + thick + broad Gaussian at 9.13 keV. 23 July 2002 First A1 to A3 transition.
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23 July 2002 Brian Dennis NASA/GSFC 26 July 2013
23 July 2013A1 and A3 Attenuator States Note 3 distinct peaks
23 July 2002 2vth + thick + broad Gaussian at 9.13 keV
23 July 2002First A1 to A3 transition Count-flux spectrum below ~6 keV stays flat independent of slope in the 11 to 20 keV range where the K-escape events originate. For K-escape to explain the counts below 5 keV, count flux at 3 keV should depend on count flux at 14 keV count flux at 5 keV should depend on count flux at 16 keV
Detector Response MatrixCompton minimum = 0.01 x photopeak amplitude A1 Attenuator state A3 Attenuator state
Detector Response MatrixCompton minimum = 1% of photopeak amplitude A1 Attenuator state A3 Attenuator state
23 July 2002Minimum Compton Continuum Probability (MCCP) MCCP = 1.e-4 MCCP = 5.e-5
23 July 2002Minimum Compton Continuum Probability (MCCP) MCCP = 5.e-5
K-Escape ChangesA3 Attenuator State Interval 6 Interval 31 Plotted absolute value of K-escape change since it is an increase in counts at energies below the germanium K-edge at 11 keV and a decrease above 11 keV.
K-escape and Compton ChangesInterval 32 Compton minimum = 0.0 K-escape tweak = 1.1
Germanium K-shell Energies kescape_tweak = 5 • Kα1 – 9.88 keV • Kα2 – 9.86 keV • Kβ1 – 10.98 keV • Kβ2 – 11.10 keV • Kβ3 – 10.975 keV • Kβ5 – 11.074 keV • K-edge – 11.1 keV • drm_mod(0) = 0.1 • drm_mod(1) = -0.19
Germanium K-edge Energy • K-alpha – 9.88 keV • K-edge – 11.1 keV • kescape_tweak = 1.1 • drm_mod(0) = 0.6 • drm_mod(1) = -0.45 keV
23 July 2002 Failure to fit Interval #6 kescape_tweak = 1.4 Excess counts below 6 keV
23 July 2002 Detector #4 Multitherm_pow Thick2 Albedo kescape_tweak = 1.4 10 keV peak FWHM <0.4 keV Fe abundance (fraction of coronal)
23 July 2002 Detector #4 Multitherm_pow Thick2 Albedo kescape_tweak = 1.4 10 keV peak FWHM <2 keV Fe abundance (fraction of coronal)
23 July 20013 DEM at 2 keV DEM at 2 keV Max. Temperature Gaussian Line Intensity DEM power-law index
23 July 2002thick2_norm Flux at 50 keV Flux at 50 keV Delta1 Fe Abundance Elow in keV
23 July 2002Ireland et al. ApJ, 769:89, 2013 • Interval: 00:30:00–00:30:20.250 UT • Energy: 15 to 500 keV • Energy bins: 90 • Detector #4