Difference between revisions of "GOES Flux vs STIX counts"

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

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.