23 July 2014 CLASS: the cosmology large angular scale surveyor
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The Cosmology Large Angular Scale Surveyor (CLASS) is an experiment to measure the signature of a gravitationalwave background from inflation in the polarization of the cosmic microwave background (CMB). CLASS is a multi-frequency array of four telescopes operating from a high-altitude site in the Atacama Desert in Chile. CLASS will survey 70% of the sky in four frequency bands centered at 38, 93, 148, and 217 GHz, which are chosen to straddle the Galactic-foreground minimum while avoiding strong atmospheric emission lines. This broad frequency coverage ensures that CLASS can distinguish Galactic emission from the CMB. The sky fraction of the CLASS survey will allow the full shape of the primordial B-mode power spectrum to be characterized, including the signal from reionization at low ɺ. Its unique combination of large sky coverage, control of systematic errors, and high sensitivity will allow CLASS to measure or place upper limits on the tensor-to-scalar ratio at a level of r = 0:01 and make a cosmic-variance-limited measurement of the optical depth to the surface of last scattering, Ƭ .
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Thomas Essinger-Hileman, Thomas Essinger-Hileman, Aamir Ali, Aamir Ali, Mandana Amiri, Mandana Amiri, John W. Appel, John W. Appel, Derek Araujo, Derek Araujo, Charles L. Bennett, Charles L. Bennett, Fletcher Boone, Fletcher Boone, Manwei Chan, Manwei Chan, Hsiao-Mei Cho, Hsiao-Mei Cho, David T. Chuss, David T. Chuss, Felipe Colazo, Felipe Colazo, Erik Crowe, Erik Crowe, Kevin Denis, Kevin Denis, Rolando Dünner, Rolando Dünner, Joseph Eimer, Joseph Eimer, Dominik Gothe, Dominik Gothe, Mark Halpern, Mark Halpern, Kathleen Harrington, Kathleen Harrington, Gene C. Hilton, Gene C. Hilton, Gary F. Hinshaw, Gary F. Hinshaw, Caroline Huang, Caroline Huang, Kent Irwin, Kent Irwin, Glenn Jones, Glenn Jones, John Karakla, John Karakla, Alan J. Kogut, Alan J. Kogut, David Larson, David Larson, Michele Limon, Michele Limon, Lindsay Lowry, Lindsay Lowry, Tobias Marriage, Tobias Marriage, Nicholas Mehrle, Nicholas Mehrle, Amber D. Miller, Amber D. Miller, Nathan Miller, Nathan Miller, Samuel H. Moseley, Samuel H. Moseley, Giles Novak, Giles Novak, Carl Reintsema, Carl Reintsema, Karwan Rostem, Karwan Rostem, Thomas Stevenson, Thomas Stevenson, Deborah Towner, Deborah Towner, Kongpop U-Yen, Kongpop U-Yen, Emily Wagner, Emily Wagner, Duncan Watts, Duncan Watts, Edward J. Wollack, Edward J. Wollack, Zhilei Xu, Zhilei Xu, Lingzhen Zeng, Lingzhen Zeng, "CLASS: the cosmology large angular scale surveyor", Proc. SPIE 9153, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VII, 91531I (23 July 2014); doi: 10.1117/12.2056701; https://doi.org/10.1117/12.2056701


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