This page provides CFHT users with information necessary to prepare proposals (deadline, submission process, information about the instruments).

Here is a quick access to frequently used links:

Time Allocation
Proposals MegaPrime /
ESPaDOnS Sitelle Weather

Preparation of proposals

CFHT is open for proposals twice a year. The deadlines are usually around March 21st and September 21st. All proposals must use the electronic proposal system operated by CFHT. It all started with Semester 2010B. CFHT adapted the Northstar Phase 1 tool written initially for the Radionet community. Northstar has been ported to CFHT and modified in house to handle our specific requirements. When a semester is open for proposals, an announcement is made on the CFHT Front Page and the information is also available on the web.

Please note the instructions on how to properly acknowledge CFHT in refereed papers.

CFHT's instruments

CFHT offers various imagers and spectrographs:

  • Spectro-imager
    • The following spectro-imager is available at CFHT:
      • Sitelle - SITELLE provides integral field unit (IFU) spectroscopic capabilities in the visible (350 to 900 nm) over an 11 by 11 arcminutes field of view, with a variable spectral resolution, depending on the requirement of the observer, from R=2 to R>104 (for low to high spectroscopic studies).
  • Imaging instruments
    • The following imaging instruments are available at CFHT:
      • WIRCam - The Wide-Field IR camera, with four 2048 x 2048 pixel HAWAII2-RG detectors, a 20 arcminute x 20 arcminute field-of-view and a sampling of 0.3 arcsecond per pixel
      • MegaPrime / MegaCam - The CFHT 36 CCD mosaic 1 square degree CCD imager
    • The following instruments are no longer offered at CFHT:
      • FOCAM - The Cassegrain or AOB/PUEO imaging camera.
      • CFH12K - The CFHT 12k x 8k pixel, CCD mosaic camera.
      • CFHT-IR - The f/8 1k x 1k infrared detector
      • MOS - The Multi-Object Spectrograph, can also be used for imaging
      • OSIS - The Optionally Stabilized Imager and Spectrometer at Cassegrain f/8
      • KIR - The AOB/PUEO 1k x 1k infrared detector
  • Spectrographs
    • The following spectrographs are available at CFHT:
      • ESPaDOnS - The échelle spectrograph/spectropolarimeter
    • The following spectrographs have been decommissioned or are no longer offered:
      • OASIS - An integral field spectrograph for use with AOB/PUEO
      • FTS - The Fourier Transform Spectrograph at f/35
      • MOS - The f/8 Multi Object Spectrograph
      • OSIS - Optionally Stabilized Imager and Spectrometer at Cassegrain f/8
      • Gecko - Coude f/4 Spectrograph
      • Fabry-Perot - For use with MOS, OSIS, and AOB/PUEO
      • GriF - A multi-mode infrared integral field spectrograph for use with AOB/PUEO
  • Detectors
  • Detectors no longer offered
    • Redeye - 2562 NICMOS
    • Loral3 - 2048 × 2048   - frontside illuminated
    • CFH12K - 12,288 × 8,192  - backside illuminated
    • EEV2- 2048 × 4500 - backside illuminated - Gecko only
    • MIT1 - MIT chip similar to those found in CFH12K - very good red response, very low fringing - for MOS
    • MIT2 - MIT chip similar to those found in CFH12K - very good red response, very low fringing, but a lot of bad columns - for Gecko only
    • CFHT-IR - 10242 HgCdTe
    • EEV1- 2048 × 4500 - backside illuminated - ESPaDOnS only
    • KIR - 10242 HgCdTe
  • Related information

Preparation of observing runs

Please note that because CFHT rarely has classical observing runs nowadays, this section is not kept as up-to-date as the other sections of this page.

The visiting astronomer should read the Welcome to the Canada-France-Hawaii Telescope! document for general information on traveling to Hawaii, the observing run and staying at Hale Pohaku (the 'base camp' of the telescope). The CFHT Observatory Manual contains some additional information on the telescope.

Observers are required to fill in forms before and after their run:

Please note the instructions on how to properly acknowledge CFHT in refereed papers

Observing at CFHT


CFHT data archive at CADC

Observations obtained with the Canada-France-Hawaii Telescope from February 1990 to the present are archived at the CADC. The CFHT archive at CADC allows searches by observation meta-data, such as object name and run ID, and presents the results of the search in a tabular format. Users can request and receive archival data and, for some imaging data, previews of CFHT data.