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-scatter.png|400px|thumb|none| Left: Histogram 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. ]]
 
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. ]]
  

Revision as of 10:21, 15 January 2022

Left: Histogram 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.

Table: STIX counts vs GOES flux

log10(stix_counts/R^2) log10(goes_flux) 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 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.