Canada–France–Hawaii Telescope

{{Short description|Astronomy observatorium}}

{{Infobox telescope

|locmapin=USA Hawaii}}

The Canada–France–Hawaii Telescope (CFHT) is located near the summit of Mauna Kea mountain on Hawaii's Big Island at an altitude of 4,204 meters (13,793 feet), part of the Mauna Kea Observatory. Operational since 1979,[http://www.cfht.hawaii.edu/en/about/ Canada France Hawaii Telescope] the telescope is a Prime Focus/Cassegrain configuration with a usable aperture diameter of {{convert|3.58|m}}.

CFHT is currently considering a refurbishment to the facility in the 2020s. The facility would be reconstructed with a new 11-m telescope to produce the Maunakea Spectroscopic Explorer, retaining the same base building and infrastructure. First light is expected no earlier than 2029.{{citation needed|date=November 2019}}

Funding

The corporation is bound by a tripartite agreement between the University of Hawaii at Manoa, in the United States, the National Research Council (NRC) in Canada and the Centre National de la Recherche Scientifique (CNRS) in France. CFHT also has partnerships with the National Astronomical Observatory of China (NAOC), the Academia Sinica Institute of Astronomy and Astrophysics (ASIAA) in Taiwan, the National Laboratory of Astrophysics (LNA) in Brazil and the Korea Astronomy and Space Science Institute (KASI) in Korea. 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 the Optical Infrared Coordination Network for Astronomy (OPTICON) access program.

Instruments

CFHT currently operates five instruments:

  • MegaPrime/MegaCam,[http://adsabs.harvard.edu/abs/2003SPIE.4841...72B MegaCam paper] on ADS a one square degree field high-resolution CCD mosaic of 40 CCDs totalling 378 megapixels
  • WIRCam (Wide-Field Infrared Camera),[http://adsabs.harvard.edu/abs/2004SPIE.5492..978P WIRCam paper] on ADS an infrared mosaic of 4 detectors totalling 16 megapixels, optimized for the J, H, and K spectral bands{{Cite web |url=http://www.ino.ca/en-ca/achievements/description/project-p/canada-france-hawaii-telescope.html |title=Relay optics to correct telescope aberrations and widen the usual field-of-view |access-date=2012-02-01 |archive-url=https://web.archive.org/web/20120731045840/http://www.ino.ca/en-CA/Achievements/Description/project-p/Canada-France-Hawaii-Telescope.html |archive-date=2012-07-31 |url-status=dead }}
  • ESPaDOnS (Echelle SpectroPolarimetric Device for the Observation of Stars at CFHT),[http://adsabs.harvard.edu/abs/2006ASPC..358..362D ESPaDOnS paper] on ADS an echelle spectrograph/spectropolarimeter
  • SITELLE (Spectromètre Imageur à Transformée de Fourier pour l'Etude en Long et en Large de raies d'Emission), a wide-field Fourier transform spectrograph{{Cite web|url=http://www.cfht.hawaii.edu/Instruments/Sitelle/SITELLE.php|title=SITELLE Home Page|website=www.cfht.hawaii.edu|language=en|access-date=2021-07-23}}
  • SPIRou (Spectropolarimètre Infrarouge), a near-infrared spectropolarimeter{{cite web|title=SPIRou homepage|website=www.cfht.hawaii.edu|language=en|url=http://www.cfht.hawaii.edu/en/projects/SPIRou/|access-date=2021-07-23}}

Notable discoveries

In March 2025, astronomers using the CFHT announced the discovery of 128 new moons of Saturn, bringing the gas giant's total number of confirmed satellites to 274.{{Cite news |url=https://phas.ubc.ca/2025-discovery-more-saturnian-moons |title=2025 Discovery of more Saturnian Moons |date=11 March 2025 |work=The University of British Columbia|publisher=The University of British Columbia|accessdate=12 March 2025}}{{Cite news |url=https://www.newscientist.com/article/2471071-saturn-has-128-new-moons-more-than-the-rest-of-the-planets-combined/ |title=Saturn has 128 new moons – more than the rest of the planets combined |date=11 March 2025 |work=New Scientist|publisher=New Scientist|accessdate=12 March 2025}}

Outreach

CFHT, in collaboration with Coelum Astronomia, maintains a public-outreach website called "Hawaiian Starlight"{{Cite web|url=http://www.cfht.hawaii.edu/HawaiianStarlight/trailer.html|title=Hawaiian Starlight Film - Exploring the Universe from Mauna Kea - CFHT's Official Site|website=www.cfht.hawaii.edu|access-date=2017-12-30}} which offers extremely high-quality versions of CFHT images in various formats including a yearly calendar.

Gallery

{{indiscriminate gallery|date=April 2025}}

File:Canada-France-Hawaii Telescope with moon.jpg

|Image:Canada-France-Hawaii-Telescope-dome.jpeg

|Image:CFHT-03.jpg

|File:CFHTLenSDMmap2012.jpg map from 2012 by CFHT Lensing Survey (CFHTLenS).{{Cite journal|last1=Heymans|first1=Catherine|last2=Van Waerbeke|first2=Ludovic|last3=Miller|first3=Lance|last4=Erben|first4=Thomas|last5=Hildebrandt|first5=Hendrik|last6=Hoekstra|first6=Henk|last7=Kitching|first7=Thomas D.|last8=Mellier|first8=Yannick|last9=Simon|first9=Patrick|last10=Bonnett|first10=Christopher|last11=Coupon|first11=Jean|date=2012-11-21|title=CFHTLenS: the Canada–France–Hawaii Telescope Lensing Survey: CFHTLenS|journal=Monthly Notices of the Royal Astronomical Society|language=en|volume=427|issue=1|pages=146–166|arxiv=1210.0032|doi=10.1111/j.1365-2966.2012.21952.x|doi-access=free |s2cid=24731530 }}{{Cite web|title=News CFHT - Astronomers reach new frontiers of dark matter|url=https://www.cfht.hawaii.edu/en/news/CFHTLens/|access-date=2021-11-26|website=www.cfht.hawaii.edu}} The central colour inset shows the previous largest COSMOS dark matter map]]

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See also

References

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