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| <color red > New: </color>** [[observation:2025campaign#2025 campaign schedule | Preliminary schedule of 2025 observing campaign]] ** | <color red > New: </color> ** [[observation:2025campaign#2025 campaign schedule | Schedule of 2025 observing campaign]] ** \\ |
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| **[[science| Scientific research with THEMIS]]** \\ | **[[science| Scientific research with THEMIS]]** \\ |
| [[science:results| THEMIS scientific highlights and news]] \\ | [[science:results| THEMIS scientific highlights and news]] \\ |
| [[science:results:gallery| THEMIS observations and media galleries]] | [[science:gallery| THEMIS observations and media galleries]] |
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| == THEMIS image of the month: March 2025 == | == THEMIS image of the month: April 2025 == |
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| <html> <a href="https://www.themis.iac.es/lib/exe/fetch.php?media=results:gallery:ar:noaa13981_c3flare_20250206_113010.jpg"> <img src="https://www.themis.iac.es/lib/exe/fetch.php?media=results:gallery:ar:noaa13981_c3flare_20250206_113010.jpg" alt="Themis NOAA 13981 during C3.3-class flare" style="width: 100%; height: auto;"></a></html> | <html> <a href="https://www.themis.iac.es/lib/exe/fetch.php?media=results:gallery:ar:activeregionbestof_6x2.jpg"> <img src="https://www.themis.iac.es/lib/exe/fetch.php?media=results:gallery:ar:activeregionbestof_6x2.jpg" alt="2022-2025 THEMIS sunspot best-of" style="width: 100%; height: auto;"></a></html> |
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| THEMIS observations of the east sunspot group of the active region NOAA 13981 on February 6th 2025. The left image is a Knox-Thompson reconstructed from red continuum broadband camera. The right panels are intensity maps reconstructed from spectral observations by the MTR2 spectrograph observing the Hα absorption line. Theses maps are reconstructed from a scan by the telescope of the active region. While these intensity images have a lower spatial resolution, they provide a wealth of spectroscopic information. The region was observed during a flare, as can be noted by the typical ribbon-shape emission in the Hα line centre. This emission is absent from the continuum emission, indicating a chromospheric emission phenomena. Meanwhile, the red wing maps (Hα+1Å and Hα+0.5Å) display dark absorbing material above the location of the flare ribbons, signature of down-flowing dense material, a phenomena nicknamed "coronal rain". | A selection of THEMIS sunspot observations obtained between 2022 and 2025 with the [[technical:description#broadband_imaging_bbi_filter_camera | BroadBand Imaging Camera]]. Observations are performed using [[technical:tao|Themis Adaptive Optics]] and images are processed with a Knox-Thompson image-reconstruction method. </columns> |
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| [[results:gallery:imofmonth|Past images of the month]] | [[science:imofmonth|Past images of the month]] |
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