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Canada–France–Hawaii Telescope

Coordinates:19°49′31″N155°28′08″W / 19.8253°N 155.4689°W /19.8253; -155.4689
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Astronomical observatory

Canada–France–Hawaii Telescope
Alternative namesCFHT，Canada–France–Hawaii TelescopeEdit this at Wikidata
Location(s)Hawaiʻi County,Hawaii
Coordinates19°49′31″N155°28′08″W / 19.8253°N 155.4689°W /19.8253; -155.4689Edit this at Wikidata
OrganizationFrench National Centre for Scientific Research
National Research Council Canada
University of Hawaiʻi at Mānoa Edit this on Wikidata
Observatory code T14 Edit this on Wikidata
Altitude4,204 m (13,793 ft)Edit this at Wikidata
Diameter3.58 m (11 ft 9 in)Edit this at Wikidata
Websitewww.cfht.hawaii.edu/en/about/Edit this at Wikidata
Canada–France–Hawaii Telescope is located in Hawaii
Canada–France–Hawaii Telescope
Location of Canada–France–Hawaii Telescope
 Related media on Commons

TheCanada–France–Hawaii Telescope (CFHT) is located near the summit ofMauna Kea mountain onHawaii'sBig Island at an altitude of 4,204 meters (13,793 feet), part of theMauna Kea Observatory. Operational since 1979,[1] the telescope is a Prime Focus/Cassegrain configuration with a usable aperture diameter of 3.58 metres (11.7 ft).

CFHT is currently considering a refurbishment to the facility in the 2020s. The facility would be reconstructed with a new 11-meter telescope to produce theMaunakea Spectroscopic Explorer, retaining the same base building and infrastructure.First light is expected no earlier than 2029.[citation needed]

Funding

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The corporation is bound by a tripartite agreement between theUniversity of Hawaii at Manoa, in theUnited States, theNational Research Council (NRC) inCanada and theCentre National de la Recherche Scientifique (CNRS) inFrance. CFHT also has partnerships with theNational Astronomical Observatory of China (NAOC), theAcademia Sinica Institute of Astronomy and Astrophysics (ASIAA) inTaiwan, theNational Laboratory of Astrophysics (LNA) inBrazil and theKorea Astronomy and Space Science Institute (KASI) inKorea. The contributions from these associate partners help fund CFHT's future instrumentation. Currently, CFHT observing time is offered to scientists from all the seven countries in the partnership. Astronomers from the European Union can also submit proposals through theOptical Infrared Coordination Network for Astronomy (OPTICON) access program.

Instruments

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CFHT currently operates five instruments:

  • MegaPrime/MegaCam,[2] a one-square-degree field high-resolutionCCD mosaic of 40 CCDs totalling 378megapixels
  • WIRCam (Wide-Field Infrared Camera),[3] an infrared mosaic of 4 detectors totalling 16 megapixels, optimized for the J, H, and K spectral bands[4]
  • ESPaDOnS (Echelle SpectroPolarimetric Device for the Observation of Stars at CFHT),[5] anechellespectrograph/spectropolarimeter
  • SITELLE (Spectromètre Imageur à Transformée de Fourier pour l'Etude en Long et en Large de raies d'Emission), a wide-fieldFourier transform spectrograph[6]
  • SPIRou (Spectropolarimètre Infrarouge), a near-infraredspectropolarimeter[7]

Notable discoveries

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In March 2025, astronomers using the CFHT announced the discovery of 128 newmoons of Saturn, bringing the gas giant's total number of confirmed satellites to 274.[8][9]

Outreach

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CFHT, in collaboration withCoelum Astronomia, maintains a public-outreach website called "Hawaiian Starlight"[10] which offers extremely high-quality versions of CFHT images in various formats including a yearly calendar.

Gallery

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This sectioncontains an excessive or unencyclopedic gallery of images. Please help improve it by removingunnecessary or indiscriminate images, and by movingrelevant images beside adjacent text in accordance with Wikipedia'sManual of Style.(April 2025) (Learn how and when to remove this message)
CFHT with moon in the background
CFHT in the morning
The telescope in August 2002
Dark matter map from 2012 by CFHT Lensing Survey (CFHTLenS).[11][12] The central colour inset shows the previous largestCOSMOS dark matter map

See also

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References

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  1. ^Canada France Hawaii Telescope
  2. ^MegaCam paper onADS
  3. ^WIRCam paper onADS
  4. ^"Relay optics to correct telescope aberrations and widen the usual field-of-view". Archived fromthe original on 2012-07-31. Retrieved2012-02-01.
  5. ^ESPaDOnS paper onADS
  6. ^"SITELLE Home Page".www.cfht.hawaii.edu. Retrieved2021-07-23.
  7. ^"SPIRou homepage".www.cfht.hawaii.edu. Retrieved2021-07-23.
  8. ^"2025 Discovery of more Saturnian Moons".The University of British Columbia. The University of British Columbia. 11 March 2025. Retrieved12 March 2025.
  9. ^"Saturn has 128 new moons – more than the rest of the planets combined".New Scientist. New Scientist. 11 March 2025. Retrieved12 March 2025.
  10. ^"Hawaiian Starlight Film - Exploring the Universe from Mauna Kea - CFHT's Official Site".www.cfht.hawaii.edu. Retrieved2017-12-30.
  11. ^Heymans, Catherine; Van Waerbeke, Ludovic; Miller, Lance; Erben, Thomas; Hildebrandt, Hendrik; Hoekstra, Henk; Kitching, Thomas D.; Mellier, Yannick; Simon, Patrick; Bonnett, Christopher; Coupon, Jean (2012-11-21)."CFHTLenS: the Canada–France–Hawaii Telescope Lensing Survey: CFHTLenS".Monthly Notices of the Royal Astronomical Society.427 (1):146–166.arXiv:1210.0032.doi:10.1111/j.1365-2966.2012.21952.x.S2CID 24731530.
  12. ^"News CFHT - Astronomers reach new frontiers of dark matter".www.cfht.hawaii.edu. Retrieved2021-11-26.

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