Difference between revisions of "GOES Flux vs STIX counts"

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[[File:Goes-stix-scatter.png|400px|thumb|none| Left: Histogram of STIX counts versus GOES flux in log-log scale.
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[[File:Goes-stix-scatter.png|400px|thumb|none| Fig. 1: Scatter plot of STIX counts versus GOES flux in log-log scale.
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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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. ]]
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[[File:Goes-stix-scatter.png|400px|thumb|none|  Fig. 2 A profile of the histogram and its fit of the quadratic function. ]]
  
Table: STIX counts vs GOES flux
 
{| class="wikitable"
 
|-
 
! scope="col"| log10(stix_counts/R^2)
 
! scope="col"| log10(goes_flux)
 
! scope="col"| std
 
|-
 
 
| 1.525 || -6.25125 || na
 
|-
 
| 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
 
|}
 
  
 
The GOES flux of a flare is estimated using
 
The GOES flux of a flare is estimated using

Revision as of 10:22, 15 January 2022

Fig. 1: Scatter plot of STIX counts versus GOES flux in log-log scale. 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.
Fig. 2 A profile of the histogram and its fit of the quadratic function.


The GOES flux of a flare is estimated using flux=10^(p0+p1*x+p2**x^2), with x=log10(stix_peak_counts)/r^2 where p0, p1, p2 are the parameters from the polynomial 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.