====== THEMIS Solar Telescope ======
The "Télescope Héliographique pour l’Étude du Magnétisme et des Instabilités Solaires" (THEMIS) of [[https://www.insu.cnrs.fr/en|CNRS-INSU]] is a 1-meter-class optical solar telescope, primarily dedicated to studying solar magnetism and the dynamical processes within the Sun’s atmosphere (such as sunspots and solar flares). THEMIS can also perform observation of near-Sun objects such as Mercury and comets.
THEMIS is located at the [[https://www.iac.es/en/observatorios-de-canarias/teide-observatory | Teide Observatory]] of [[https://www.iac.es/en | IAC]], with a base office in La Laguna, in Tenerife, Canary Islands, Spain.
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2025 campaign schedule ** ¡¡¡ Call for the [[observation:2025campaign | 2025 observing campaign]] is open !!! ** \\
Deadline for "French" and "International" time" : February 17th, 2025.
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** New :** [[science:results:SeminLPP | October : Seminar on THEMIS at the Plasma Physics Laboratory, Paris (FR).]] \\
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[[science:resources | Downloadable posters highlighting recent high-resolution observations of solar active regions by THEMIS]]\\
Click for information on: \ \ **[[admin:location| How to reach THEMIS locations]]** \ ; \ **[[admin:contacts| How to contact the THEMIS team]]**
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=== Overview of telescope status ===
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[[http://themis.iac.es/wdata/Webcam/webcam.jpg | THEMIS from VTT webcam]]
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[[http://themis.iac.es/wdata/Webcam/Domecam.jpg | Webcam of THEMIS Dome]]
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Latest [[https://view.eumetsat.int/productviewer?v=default | EUMETSAT]] RGB image
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[[observation:weather | THEMIS weather page]]
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Last image from \\
THEMIS full Sun guider
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=== The THEMIS telescope and its science ===
**[[technical|Technical & scientific information about THEMIS]]** \\
[[science:objectives|THEMIS scientific objectives]] \\
[[admin|THEMIS administrative structures]]
=== Observing with THEMIS ===
**[[observation| Information for research scientists wishing to observe with THEMIS]]** \\
**[[observation:2025campaign#2025 campaign schedule | Schedule of 2025 observing campaign]]** \\
[[observation:weather | Weather at THEMIS location and weather forecast]] \\
[[observation:data| THEMIS data products & data access]]
=== THEMIS Scientific research & results ===
**[[science| Scientific research with THEMIS]]** \\
[[science:results| THEMIS scientific highlights and news]] \\
[[science:gallery| THEMIS observations and media galleries]]
== THEMIS image of the month: September 2025 ==
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THEMIS design, laid out in the 1980's, predate the revolution of adaptive optics (AO), and hence didn't foresee its installation. AO has since proved to be an indispensable technology of all modern high-resolution telescope. The core of the THEMIS overhaul that took place in the second half of the 2010's had the installation of a simple AO at the core of its objective.
The installation of the [[technical:tao|THEMIS AO]] was thus particularly challenging as it required to deal with the limited existing available space. The entry prism is thus located just inside the spectrograph container, close to its roof, in a location that is not easily accessible. In addition, as shown in the diagram of TAO, it imposed to place the wavefront sensor optical bench (as well as the scanning mirror) outside of the THEMIS spectrograph container, in a vertical layout.
[[science:imofmonth|Past images of the month]]
=== THEMIS telescope management ===
[[management|Internal pages for the THEMIS team]]\\
[[oldstart|Previous THEMIS front page]]
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