Sunday, July 20, 2025

E corona through Fe XIV - Description Setting

Imaging the E-Corona (Emission corona) through the Fe XIV line which millions time fainter then the photosphere. 


 


JSolex 3.3.2 ImageMath E Corona Script

Improved setting by Olivier Aguerre
# Reference (darkest line) of the scan (in Å)
refWl=5302.29
# Corona-E line (in Å)
targetWl=5302.90
# Continuum shift 1 (in Å)
c1=5301.5
# Continuum shift 2 (in Å)
c2=5303.6
# Fe XIV FWHM (in Å)
targetWl_fwhm=0.2

Original setting by Cedric Champeau
# Reference (darkest line) of the scan (in Å)
feI=5302.29
# Corona-E line (in Å)
feXIV=5302.86
# Continuum shift 1 (in Å)
c1=5301.84
# Continuum shift 2 (in Å)
c2=5303.44
# Fe XIV FWHM (in Å)
feXIV_fwhm=0.2


I made also 66 scans using my Sol'eX Pro 2nd Gen slit. JSolex 3.3.2 is used to stack the images. Editing was done using CS4, AstroSurface and DeNoise AI.
Use of baader continuum 8nm filter 540nm which is tilted and installed in front of the slit; getting 530nm.  
Binning 2x2 and 14ms, Gain 0. Sun at 18° above horizon and transparency not 100%.