Photometric Characterization of the Dark Energy Camera

@article{Bernstein2017PhotometricCO,
  title={Photometric Characterization of the Dark Energy Camera},
  author={Gary M. Bernstein and Timothy M. C. Abbott and Robert Armstrong and David L. Burke and H. Thomas Diehl and Robert A. Gruendl and M. D. Johnson and T. S. Li and Eli S. Rykoff and Alistair R. Walker and William C. Wester and Brian Yanny},
  journal={Publications of the Astronomical Society of the Pacific},
  year={2017},
  volume={130}
}
We characterize the variation in photometric response of the Dark Energy Camera (DECam) across its 520 Mpix science array during 4 years of operation. These variations are measured using high signal-to-noise aperture photometry of >107 stellar images in thousands of exposures of a few selected fields, with the telescope dithered to move the sources around the array. A calibration procedure based on these results brings the rms variation in aperture magnitudes of bright stars on cloudless nights… 

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