Relative and (maybe) Absolute RHESSI Detector Efficiency: 2002-2008
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== Introduction == | == Introduction == | ||
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+ | RHESSI has now been observing for nearly eight years. How has detector sensitivity changed since it was launched? | ||
[[Image:Hessi_dets_test.png|400px|thumb|left|'''Figure 1''':This is the relative detector efficiency for front detectors 3, 4, 5, 6, 8, and 9 ]] | [[Image:Hessi_dets_test.png|400px|thumb|left|'''Figure 1''':This is the relative detector efficiency for front detectors 3, 4, 5, 6, 8, and 9 ]] | ||
- | [[Image:Hessi_dets_test0.png|400px|thumb|left|'''Figure | + | |
+ | What about absolute sensitivity? | ||
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+ | [[Image:Hessi_dets_test0.png|400px|thumb|left|'''Figure 2''':GOES Hi channel flux versus RHESSI detector 1 Emission Measure for the full sample.]] | ||
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+ | Looks like a blob for small flares, do the same plot for 6 to 20 keV RHESSI detector 1 count rate. | ||
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+ | [[Image:Hessi_dets_test_ct0.png|400px|thumb|left|'''Figure 3''':GOES Hi channel flux versus RHESSI detector 1 6 to 20 keV count rate for the full sample.]] | ||
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+ | Restrict to the flares with greater than 1.0e45 emission measure. This leaves 2580 flares. | ||
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+ | [[Image:Hessi_dets_test_ct04.png|400px|thumb|left|'''Figure 4''':GOES Hi channel flux versus RHESSI detector 1 6 to 20 keV count rate for the flares with EM greater than 1.0e45 cm^(-3).]] | ||
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+ | Plot 60 day averages as a function of time. | ||
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+ | [[Image:Hessi_dets_test_ct14.png|400px|thumb|left|'''Figure 4''':60 day averages of the ratio of RHESSI 6 to 20 keV counts to GOES fluxes for the flares with EM greater than 1.0e45 cm^(-3).]] | ||
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+ | Show samples of flare ratio results for two different time ranges. | ||
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+ | [[Image:Hessi_dets_test_ct24.png|400px|thumb|left|'''Figure 5''':The ratio of RHESSI 6 to 20 keV counts to GOES fluxes for flares with EM greater than 1.0e45 cm^(-3) fortwo different time periods, one early in the mission, one just before anneal,]] | ||
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[[Category:Nugget]] | [[Category:Nugget]] |
Revision as of 00:32, 22 December 2009
Nugget | |
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Number: | 117 |
1st Author: | Jim McTiernan |
2nd Author: | |
Published: | 21 December 2009 |
Next Nugget: | TBD |
Previous Nugget: | A tiny white-light flare |
List all |
Introduction
RHESSI has now been observing for nearly eight years. How has detector sensitivity changed since it was launched?
What about absolute sensitivity?
Looks like a blob for small flares, do the same plot for 6 to 20 keV RHESSI detector 1 count rate.
Restrict to the flares with greater than 1.0e45 emission measure. This leaves 2580 flares.
Plot 60 day averages as a function of time.
Show samples of flare ratio results for two different time ranges.
Facts about Relative and (maybe) Absolute RHESSI Detector Efficiency: 2002-2008RDF feed
RHESSI Nugget Date | 21 December 2009 + |
RHESSI Nugget First Author | Jim McTiernan + |
RHESSI Nugget Index | 117 + |