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Images and Catalogues
Send comments / suggestions / problems to:
The MegaPipe CFHTLS pages
These pages present stacked images and catalogues for the CFHTLS Deep
and Wide Fields. It provides links to the data, information on how
the images and catalogues were produced and quality control information
on the data.
If you use this data in a publication, please include the following acknowledgment:
"Based on observations obtained with MegaPrime/MegaCam, a joint project
of CFHT and CEA/DAPNIA, at the Canada-France-Hawaii Telescope (CFHT)
which is operated by the National Research Council (NRC) of Canada,
the Institut National des Science de l'Univers of the Centre National
de la Recherche Scientifique (CNRS) of France, and the University of
Hawaii. This work is based in part on data products produced at the
Canadian Astronomy Data Centre as part of the Canada-France-Hawaii
Telescope Legacy Survey, a collaborative project of NRC and CNRS."
Also, please cite the following paper:
The following will give you links to the images and catalogues for the Deep and Wide fields.
There are two versions of the Deep Fields: The
"full" version contains all usuable data taken as part of the completed
survey. In addition, "best seeing" versions of the Deep fields have
been produced These images have final image qualities of 0.65
arcseonds. The selection of the best seeing images is dicussed in
There is only one version of the Wide fields.
Alternatively, you can browse the CFHTLS and retreive images, catalogs
or image cutouts using
a Google Maps type interface:
For the Deep fields only, you can view the sky at a number of different wavelengths
from X-ray to Radio, again using a Google Maps interface.
Unified catalogues have been produced for the CFHTLS. Each catalogue
covers an entire survey (Deep or Wide).
If you do not wish to download the entire CFHTLS catalog, you may wish to
use the catalog query service:
Send comments/suggestions/problems to:
These data were generated by Stephen Gwyn of the University of
Victoria and the Canadian Astronomical Data Centre. The
of these images was produced and released shortly after the first Elixir-processed
images became available from CFHT in early 2003. It became public
30 June 2006. Since then, new public version have been generated
The previous public releases were:
All these versions are superseded by the current version.
- 30 June 2006
- 1 January 2007 (2007A)
- 1 September 2007 (2007B)
- 1 February 2008 (2008A)