Documentation [PDF] - Canada France Hawaii Telescope ...

W1
W2
N
N
E
E
W3
W4
N
N
E
E
Figure 19: Positions and geometry of the CFHTLS Wide fields. The black thick contours show the total field
of view composing the u ∗ , g, r, i/y and z stacks of the T0007 release. The fields located outside these regions are
supplementary astrometric calibration data but are not included in the stacks. W1, W2, W3 and W4 do not cover
the same field of view, so the four Wide regions are not shown with the same scale in this figure. The blue squares
show a typical MegaCam field of view and indicate the positions of the reference center field. The MegaCam
images included in the release are in green. They reveal the tiling and mosaicing of each CFHTLS Wide area.
The small rectangles indicate individual MegaCam CCDs. These plots have been produced by SCAMP during the
calibration step of W1, W2, W3 and W4.
28