Difference between revisions of "GOES Flux vs STIX counts"

From stix
Jump to: navigation, search
 
(36 intermediate revisions by the same user not shown)
Line 1: Line 1:
[[File:Goes-stix-scatter.png|800px|thumb|none| Fig. 1: Scatter plot 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. ]]
+
The GOES flux of a solar flare is estimated using<br>
[[File:Goes-stix-flux-fit.png|600px|thumb|none|  Fig. 2 A profile of the histogram and its fit of the quadratic function. ]]
+
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>
  
  
The GOES flux of a flare is estimated using
+
[[File:Goes_background.png |600px|thumb|none|  An example of estimated GOES flux background. ]]
flux=10^(p0+p1*x+p2**x^2+p3*x^3),
 
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.
 

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.