Summary:
Images taken under different seeing conditions in the CFHTLS D1 field have been stacked to roughly the depth of the CFHTLS Wide Fields. These images can be used to test the effects of image quality on various measurements. Also provided is a "best half" seeing image of the D1. |
 The animation above alternately shows a stack made from 0.5 arcsec seeing images and a 1.1 arcsec stack. (Reload the page if it stop blinking) |
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Reduction procedure
The stacks were generated in exactly the same way as described here. The only difference was that only a few exposures (~10) go into each image stack rather than all the available images. The images for each stacked were selected based on the image quality value given by CADC. There are 7 stacks. The best seeing stacks was made from images with seeing 0.5 |
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Images
The images are password protected. They are primarily for
use by my collaborators. Other members of the CFHTLS community
are welcome to use them as well. However, publications
based on these data should include me on the author list.
Also, the CADC should be acknowledged in the usual way:
Guest User, Canadian Astronomy Data Centre, which is operated by the Dominion Astrophysical Observatory for the National Research Council of Canada's Herzberg Institute of Astrophysics. The images and the weight maps are available as multi-extension FITS images and as individual images. |
Multi-extension images:
The naming convention for the multi-extension images is:
D1.I.0.60-0.70.fits ^ ^ ^ | | | | | |______________ seeing range (0.6 < IQ < 0.7 in this case) | |________________ filter |___________________ fieldThe naming convention is slightly different for the "best half" seeing images. To examine the multi-extension FITS images, split them using the CFITSIO version of imcopy.
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Individual images
The naming convention for the individual images is:
D1.I.0.60-0.70.26.fits ^ ^ ^ ^ | | | |____ CCD | | |______________ seeing range (0.6 < IQ < 0.7 in this case) | |________________ filter |___________________ fieldand is similar for the weight images. The naming convention is slightly different for the "best half" seeing images. The indvidual images are arranged below by seeing band and by chip in the same configuration as the layout of MegaCam. |
| CCD number | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Data Images Weight Images | 00 00 |
01 01 |
02 02 |
03 03 |
04 04 |
05 05 |
06 06 |
07 07 |
08 08 |
| Data Images Weight Images | 09 09 |
10 10 |
11 11 |
12 12 |
13 13 |
14 14 |
15 15 |
16 16 |
17 17 |
| Data Images Weight Images | 18 18 |
19 19 |
20 20 |
21 21 |
22 22 |
23 23 |
24 24 |
25 25 |
26 26 |
| Data Images Weight Images | 27 27 |
28 28 |
29 29 |
30 30 |
31 31 |
32 32 |
33 33 |
34 34 |
35 35 |