====== 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. /* ;#; 2025 campaign schedule ** ¡¡¡ Call for the [[observation:2025campaign | 2025 observing campaign]] is open !!! ** \\ Deadline for "French" and "International" time" : February 17th, 2025. ;#; */ ** New :** [[science:resources | Downloadable posters highlighting recent high-resolution observations of solar active regions by THEMIS]]\\ [[science:results:ESTFrance2025 | June : Presentation of THEMIS results at the EST France 2025 Workshop in Paris (FR).]] \\ [[science:results:SF2A2025 | July : Presentation of THEMIS results at the "Journées de la SF2A" in Toulouse (FR).]] \\ 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 ===

\\ [[http://themis.iac.es/wdata/Webcam/webcam.jpg | THEMIS from VTT webcam]]

\\ [[http://themis.iac.es/wdata/Webcam/Domecam.jpg | Webcam of THEMIS Dome]]

\\ Latest [[https://view.eumetsat.int/productviewer?v=default | EUMETSAT]] RGB image

\\ [[observation:weather | THEMIS weather page]]

\\ Last image from \\ THEMIS full Sun guider ---- === 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: July 2025 ==

\\ If one could sneak inside [[technical:mtr2 | MTR2 spectrograph]] while THEMIS is observing, this is what one would see looking down. The picture shows the beautiful work of decomposing the white solar light into small ranges of electromagnetic spectrum that are of interest for researchers to study the physical properties of the Sun. \\ The white light beam coming from the THEMIS telescope (white light on the left) is first decomposed in a low resolution spectrum (rainbow on the middle left). A rigid mask placed on the light path, enables to select several bands within the solar spectrum that will be analysed (overlapping orange and red patch on the middle right). Finally, an echelle grating enables to strongly increase the dispersion (spacing) of the spectral domains of interest (separated and extended red and orange patch on the right). There spectral cameras are placed to record the high resolution spectrum. With its a spectral resolving power, R, of about 200 000-300 000, THEMIS MTR2 spectrograph has one of the world's best resolving power in astrophysics. MTR2 has the ability to distinguish between two wavelengths separated by a small amount. THEMIS theoretical can produce simultaneously up to eight high resolution spectrograms (although most cases, only 2-4 are requested). The choice of wavelength domains is not pre-imposed to the visiting research scientist observing with THEMIS. The choice is left to the investigators, giving them a high level of freedom to study [[https://www.themis.iac.es/doku.php?id=science:objectives | diverse topics in solar physics]]. \\ [[science:imofmonth|Past images of the month]] === THEMIS telescope management === [[management|Internal pages for the THEMIS team]]\\ [[oldstart|Previous THEMIS front page]]