Fe XIV 530.3 nm (green), Fe XI 789.2 nm (red) and continuum (white)
This image was created using data from two observing places in Chile and Agentina.
Color image is a composition of 226 eclipse images (calibrated using about 2800 dark-frames and
flat-fields) acquired with 5 different instruments - ZWO ASI1600MM Pro camera for white-light
(continuum) images and two pairs of Atik cameras for imaging of Fe XI and Fe XIV emission. Continuum
is displayed as neutral gray, Fe XI is presented as red color and Fe XIV as green color.
Charged particles are tracers of magnetic field lines. At present, they are the only tools
available to visualize the 'shape' of magnetic field lines in the solar corona, thus yielding an
image of their distribution in the plane of the sky. However, there are limitations when using ions,
such as Fe XI and Fe XIV, since they populate different magnetic structures with different
temperatures. Hence, the image of solar magnetic field structures, which they provide, is incomplete.
Fortunately, free coronal electrons, scattering the photospheric light towards the observer, are
omnipresent and therefore the visualization the solar magnetic filed in the white-light (continuum)
image is detailed and complete. That is why the composition presented in this page provides valuable
information about the structure of the solar magnetic field and at the same time visualizes the
distribution of Fe ions.
Click on the image or on the following reference to display the
higher resolution image version (1.5 MB, PNG format).
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| Image | TSE_2019_Rodeo_FeXI_FeXIV_WL.jpg |
| Date | 02. 07. 2019 |
| Time | (1) 2nd contact 20:38:55 UT, 3rd contact 20:41:23 UT(2) 2nd contact 20:40:01 UT, 3rd contact 20:42:53 UT |
| Place | (1) top of a hill near Tres Cruses, Chile(2) Rodeo, Argentina |
| Coordinate | (1) S 29° 26.887', W 70° 49.136', Alt. 1160 m(2) S 30° 11.645', W 69° 06.155', Alt. 1550 m |
| Conditions | (1) Clear sky, solar altitude 13.2° above horizon(2) Clear sky, solar altitude 11.5° above horizon |
| Optics | (1) TS Imaging Star 4.9/347 mm(2) 4× Achromat 4/300 mm equipped with following narrow band filters:
On-band filter: Andover, center wavelength: 789.2 nm, bandwidth 0.5 nm
Off-band filter: Andover, center wavelength: 786.1 nm, bandwidth 0.5 nm
On-band filter: Andover, center wavelength: 530.3 nm, bandwidth 0.5 nm
Off-band filter: Andover, center wavelength: 527.3 nm, bandwidth 0.5 nm |
| Camera | (1) ZWO ASI1600MM Pro(2) 2×Atik 414EX for Fe XI and 2×Atik 314L for Fe XIV |
| Exposure | (1) 0.001 s - 1.024 s(2) 0.1 s - 12.8 s |
| Processing | Composition of 226 eclipse images (Continuum: 128, Fe XIV: 30 On-band and 30 Off-band, Fe XI: 29 On-band and 29 Off-band,) taken with 5 cameras. Images were calibrated by means of dark frames and flat-fields, aligned by means of phase correlation, composed by means of LDIC 6.0 software, continuum was removed from emission by subtracting the Off-band images, than resulting image was processed using Corona 5.0 software in order to visualize coronal structures. Final processing was done using ACC 6.1 software.
Image processing by Miloslav Druckmüller |
| Software | Astro D3F 2.0, PhaseCorr 7.0, LDIC 6.0, Corona 6.0, Sofo ACC 6.1 |
| Orientation | This image has correct solar North-top orientation |
| Copyright | © 2019 Miloslav Druckmüller, Peter Aniol, Shadia Habbal, Pavel Štarha, Judd Johnson,
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Miloslav Druckmüller
Institute of Mathematics, Faculty of Mechanical Engineering
Brno University of Technology, Czech Republic
druckmuller@fme.vutbr.cz
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Page last update: 19.3.2021
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