H. T. Diehl, E. Neilsen, R. Gruendl, B. Yanny, T. M. Abbott, J. Aleksić, S. Allam, J. Annis, E. Balbinot, M. Baumer, L. Beaufore, K. Bechtol, G. Bernstein, S. Birrer, C. Bonnett, D. Brout, C. Bruderer, E. Buckley-Geer, D. Capozzi, A. Carnero Rosell, F. Castander, R. Cawthon, C. Chang, L. Clerkin, R. Covarrubias, C. Cuhna, C. D'Andrea, L. da Costa, R. Das, C. Davis, J. Dietrich, A. Drlica-Wagner, A. Elliott, T. Eifler, J. Etherington, B. Flaugher, J. Frieman, A. Fausti Neto, M. Fernández, C. Furlanetto, D. Gangkofner, D. Gerdes, D. Goldstein, K. Grabowski, R. Gupta, S. Hamilton, H. Head, J. Helsby, D. Hollowood, K. Honscheid, D. James, M. Johnson, S. Jouvel, T. Kacprzac, S. Kent, R. Kessler, A. Kim, E. Krause, C. Krawiec, A. Kremin, R. Kron, S. Kuhlmann, N. Kuropatkin, O. Lahav, J. Lasker, T. Li, E. Luque, N. Maccrann, M. March, J. Marshall, N. Mondrik, E. Morganson, D. Mudd, A. Nadolski, P. Nugent, P. Melchior, F. Menanteau, D. Nagasawa, B. Nord, R. Ogando, L. Old, A. Palmese, D. Petravick, A. Plazas, A. Pujol, A. Queiroz, K. Reil, A. Romer, R. Rosenfeld, A. Roodman, P. Rooney, M. Sako, A. Salvador, C. Sánchez, E. Sánchez Álvaro, B. Santiago, A. Schooneveld, M. Schubnell, E. Sheldon, A. Smith, R. Smith, M. Soares-Santos, F. Sobreira, M. Soumagnac, H. Spinka, S. Tie, D. Tucker, V. Vikram, K. Vivas, A. Walker, W. Wester, M. Wiesner, H. Wilcox, P. Williams, A. Zenteno, Y. Zhang, Z. Zhang
The Dark Energy Survey (DES) is an operating optical survey aimed at understanding the accelerating expansion of the universe using four complementary methods: weak gravitational lensing, galaxy cluster counts, baryon acoustic oscillations, and Type Ia supernovae. To perform the 5000 sq-degree wide field and 30 sq-degree supernova surveys, the DES Collaboration built the Dark Energy Camera (DECam), a 3 square-degree, 570-Megapixel CCD camera that was installed at the prime focus of the Blanco 4-meter telescope at the Cerro Tololo Inter-American Observatory (CTIO). DES has completed its third observing season out of a nominal five. This paper describes DES “Year 1” (Y1) to “Year 3” (Y3), the strategy, an outline of the survey operations procedures, the efficiency of operations and the causes of lost observing time. It provides details about the quality of the first three season's data, and describes how we are adjusting the survey strategy in the face of the El Niño Southern Oscillation.
H. Diehl, T. M. Abbott, J. Annis, R. Armstrong, L. Baruah, A. Bermeo, G. Bernstein, E. Beynon, C. Bruderer, E. Buckley-Geer, H. Campbell, D. Capozzi, M. Carter, R. Casas, L. Clerkin, R. Covarrubias, C. Cuhna, C. D'Andrea, L. da Costa, R. Das, D. DePoy, J. Dietrich, A. Drlica-Wagner, A. Elliott, T. Eifler, J. Estrada, J. Etherington, B. Flaugher, J. Frieman, A. Fausti Neto, M. Gelman, D. Gerdes, D. Gruen, R. Gruendl, J. Hao, H. Head, J. Helsby, K. Hoffman, K. Honscheid, D. James, M. Johnson, T. Kacprzac, J. Katsaros, R. Kennedy, S. Kent, R. Kessler, A. Kim, E. Krause, R. Kron, S. Kuhlmann, A. Kunder, T. Li, H. Lin, N. Maccrann, M. March, J. Marshall, E. Neilsen, P. Nugent, P. Martini, P. Melchior, F. Menanteau, R. Nichol, B. Nord, R. Ogando, L. Old, A. Papadopoulos, K. Patton, D. Petravick, A. Plazas, R. Poulton, A. Pujol, K. Reil, T. Rigby, A. Romer, A. Roodman, P. Rooney, E. Sanchez Alvaro, S. Serrano, E. Sheldon, A. Smith, R. Smith, M. Soares-Santos, M. Soumagnac, H. Spinka, E. Suchyta, D. Tucker, A. Walker, W. Wester, M. Wiesner, H. Wilcox, R. Williams, B. Yanny, Y. Zhang
The Dark Energy Survey (DES) is a next generation optical survey aimed at understanding the accelerating expansion of the universe using four complementary methods: weak gravitational lensing, galaxy cluster counts, baryon acoustic oscillations, and Type Ia supernovae. To perform the 5000 sq-degree wide field and 30 sq-degree supernova surveys, the DES Collaboration built the Dark Energy Camera (DECam), a 3 square-degree, 570-Megapixel CCD camera that was installed at the prime focus of the Blanco 4-meter telescope at the Cerro Tololo Inter-American Observatory (CTIO). DES started its first observing season on August 31, 2013 and observed for 105 nights through mid-February 2014. This paper describes DES “Year 1” (Y1), the strategy and goals for the first year's data, provides an outline of the operations procedures, lists the efficiency of survey operations and the causes of lost observing time, provides details about the quality of the first year's data, and hints at the “Year 2” plan and outlook.
The Carnegie Institution operates the twin 6.5m Magellan Telescopes on behalf of the Magellan consortium (Carnegie
Institution of Washington, Harvard University, the University of Arizona, Massachusetts Institute of Technology, and the
University of Michigan). The two telescopes have been in routine operations at the Las Campanas Observatory since
2001 and 2002 respectively. We currently operate with a suite of instruments available at 6 active ports during regular
night-time science operations. Here, we briefly describe the capabilities, operation, and performance of the suite of
commissioned instruments including MagIC, PANIC, MIKE, MIKE-Fibers, LDSS3, IMACS, and MagE. Beyond the
instruments that are presently installed on site, we will also introduce the large number of instruments that are in
advanced stages of construction by teams throughout our consortium (FIRE, Four-Star, MegaCam, MMIRS, PFS,
PISCO, MIRAC4).
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