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− | [[File:Goes-stix-flux.png|800px|thumb|none| Left: Histogram of STIX counts versus GOES flux in log-log scale. | + | [[File:Goes stix flux fit lms.png|800px|thumb|none| Scatter plot of STIX counts (4 - 10 keV) versus GOES and as well as a linear fit and a polynomial fit to the data. ]] |
− | STIX counts are divided by the squared distances between Solar Orbiter and the Sun. 1045 flares with look-angles from the Earth smaller than 90 degrees are selected. Right: a profile of the histogram and its fit of the quadratic function. ]] | + | The GOES flux of a solar flare is estimated using<br> |
| + | flux=10^(p0+p1*x), <br> |
| + | with x=log10(stix_peak_counts*r^2)<br> |
| + | where p0, p1 are the parameters from the curve fit, peak_counts is the STIX QL LC peak |
| + | counts and r is the distance between the Sun and solar orbiter in units of au. <br> |
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− | 1.525 -6.25125 na
| + | [[File:Goes_background.png |600px|thumb|none| An example of estimated GOES flux background. ]] |
− | 1.655 -6.67554 0.111809
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− | 1.785 -6.55375 0.184885
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− | 1.915 -6.54825 0.229522
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− | 2.045 -6.56475 0.195695
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− | 2.175 -6.55637 0.198651
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− | 2.305 -6.57996 0.200228
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− | 2.435 -6.47682 0.223041
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− | 2.565 -6.46797 0.216562
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− | 2.695 -6.41793 0.27564
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− | 2.825 -6.36375 0.223797
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− | 2.955 -6.3481 0.268878
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− | 3.085 -6.24556 0.246008
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− | 3.215 -6.23418 0.235726
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− | 3.345 -6.15042 0.320178
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− | 3.475 -6.1948 0.240977
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− | 3.605 -6.09313 0.25082
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− | 3.735 -5.96493 0.265629
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− | 3.865 -5.93862 0.35869
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− | 3.995 -5.83875 0.146257
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− | 4.125 -5.85643 0.179611
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− | 4.255 -5.83875 0.169521
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− | 4.385 -5.59125 0.124728
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− | 4.515 -5.37125 0.0388909
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− | 4.645 -5.4675 0.227187
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− | 4.775 -5.40563 0.187903
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− | 5.165 -4.76625 0.0825
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− | 5.295 -4.62875 0.406033
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− | 5.555 -4.76625 0.33
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− | 5.945 -4.68375 na
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Latest revision as of 10:29, 21 January 2022
Scatter plot of STIX counts (4 - 10 keV) versus GOES and as well as a linear fit and a polynomial fit to the data.
The GOES flux of a solar flare is estimated using
flux=10^(p0+p1*x),
with x=log10(stix_peak_counts*r^2)
where p0, p1 are the parameters from the curve fit, peak_counts is the STIX QL LC peak
counts and r is the distance between the Sun and solar orbiter in units of au.
An example of estimated GOES flux background.