Difference between revisions of "GOES Flux vs STIX counts"

From stix
Jump to: navigation, search
 
(45 intermediate revisions by the same user not shown)
Line 1: Line 1:
−
[[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>
  
  
−
{| class="wikitable"
+
[[File:Goes_background.png |600px|thumb|none| An example of estimated GOES flux background. ]]
−
|-
 
−
! 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
 
−
|}
 

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.
Retrieved from "https://pub023.cs.technik.fhnw.ch/wiki/index.php?title=GOES_Flux_vs_STIX_counts&oldid=15978"