M. Soares-Santos, J. Annis, M. Bonati, E. Buckley-Geer, H. Cease, D. DePoy, G. Derylo, H. T. Diehl, A. Elliott, J. Estrada, D. Finley, B. Flaugher, J. Frieman, J. Hao, K. Honscheid, I. Karliner, K. Krempetz, K. Kuehn, S. Kuhlmann, K. Kuk, H. Lin, W. Merrit, E. Neilsen, L. Scott, S. Serrano, T. Shaw, K. Schultz, W. Stuermer, A. Sypniewski, J. Thaler, A. Walker, J. Walton, W. Wester, B. Yanny, for the DES Collaboration
The Dark Energy Survey (DES) is a next generation optical survey aimed at
measuring the expansion history of the universe using four probes: weak
gravitational lensing, galaxy cluster counts, baryon acoustic oscillations, and
Type Ia supernovae. To perform the survey, the DES Collaboration is building
the Dark Energy Camera (DECam), a 3 square degree, 570 Megapixel CCD camera
which will be mounted at the Blanco 4-meter telescope at the Cerro Tololo
Inter- American Observatory. DES will survey 5000 square degrees of the
southern galactic cap in 5 filters (g, r, i, z, Y). DECam will be comprised of
74 250 micron thick fully depleted CCDs: 62 2k x 4k CCDs for imaging and 12 2k
x 2k CCDs for guiding and focus. Construction of DECam is nearing completion.
In order to verify that the camera meets technical specifications for DES and
to reduce the time required to commission the instrument, we have constructed a
full sized telescope simulator and performed full system testing and
integration prior to shipping. To complete this comprehensive test phase we
have simulated a DES observing run in which we have collected 4 nights worth of
data. We report on the results of these unique tests performed for the DECam
and its impact on the experiments progress.
View original:
http://arxiv.org/abs/1111.4717
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