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| themis [2026/03/31 14:51] – etienne | themis [2026/04/24 09:23] (current) – etienne |
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| == THEMIS image of the month: March 2026 == | == THEMIS image of the month: April 2026 == |
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| <columns 100% l 50> | <columns 100% l 50> |
| <html> <a href="https://www.themis.iac.es/lib/exe/fetch.php?media=science:gallery:protu:karki2026_fig4_sm.jpg"> | <html> <a href="https://www.themis.iac.es/lib/exe/fetch.php?media=science:results:1stLight1996.jpg"> |
| <img src="https://www.themis.iac.es/lib/exe/fetch.php?media=science:gallery:protu:karki2026_fig4_sm.jpg" | <img src="https://www.themis.iac.es/lib/exe/fetch.php?media=science:results:1stLight1996.jpg" |
| alt="THEMIS cable reel" style="width: 100%; height: auto;"></a></html> \\ | style="width: 100%; height: auto;"></a></html> \\ |
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| Zoomed view of a solar filament observed on September 28th (top row) & 29th (bottom row) 2003, by GONG (left column) in Hα, and the slit-reconstructed images from the spectra in the Hα line center observed by THEMIS (middle column), and in the Mg II k line center (2796.4 Å) by IRIS (right column). The contours (blue) of the filament observed in GONG are overlaid on the THEMIS image, and the filament contours from THEMIS are overlaid in white over GONG and IRIS images to show the THEMIS FOV. Figure published in [[https://iopscience.iop.org/article/10.3847/1538-4357/ae40b6 | Garima Karki et al, ApJ, 999, 148, 2026.]] | Thirty years ago, in March 1996, THEMIS witnessed its first light. For the first time, THEMIS targeted and tracked the Sun (upper right image of THEMIS tracking software, still in used today). THEMIS long-slit spectrograph acquired its first solar spectral images (bottom right image). This key moment was a pivotal point marking the transition of the end of the development of the project toward the start of its scientific exploitation. It crowned a twenty year effort, which started in the middle of the 1970's, for the construction of what is still the largest French solar telescope, and one of the world-largest one. The construction and design of the THEMIS telescope was led by J. Rayrole (picture on the left taken for the 1st light) along with P. Mein and M. Semel, the three "founding fathers" of THEMIS. |
| </columns> | </columns> |
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| [[science:imofmonth|Past images of the month]] | [[science:imofmonth|Past images of the month]] |
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