Browsing by Author "Xu, Zhilei"

Now showing items 1-5 of 5

  • On-sky performance of the CLASS Q-band telescope 

    Appel, John W.; Xu, Zhilei; Padilla, Ivan L.; Harrington, Kathleen; Pradenas Marquez, Bastián; Ali, Aamir; Bennett, Charles L.; Brewer, Michael K.; Bustos Placencia, Ricardo; Chan, Manwei; Chuss, David T.; Cleary, Joseph; Couto, Jullianna Denes; Dahal, Sumit; Denis, Kevin; Dünner, Rolando; Eimer, Joseph R.; Essinger Hileman, Thomas; Fluxa, Pedro; Gothe, Dominik; Hilton, Gene C.; Hubmayr, Johannes; Iuliano, Jeffrey; Karakla, John; Marriage, Tobias A.; Miller, Nathan J.; Núñez, Carolina; Parker, Lucas; Petroff, Matthew; Reintsema, Carl D.; Rostem, Karwan; Stevens, Robert W.; Nunes Valle, Deniz Augusto; Wang, Bingjie; Watts, Duncan J.; Wollack, Edward J.; Zeng, Lingzhen (2019-05-10)
    The Cosmology Large Angular Scale Surveyor (CLASS) is mapping the polarization of the cosmic microwave background (CMB) at large angular scales (2 < ℓ lesssim 200) in search of a primordial gravitational wave B-mode signal ...

  • The Atacama Cosmology Telescope: Modeling bulk atmospheric motion 

    Morris, Thomas W.; Bustos, Ricardo; Calabrese, Erminia; Choi, Steve K.; Duivenvoorden, Adriaan J.; Dunkley, Jo; Dünner, Rolando; Gallardo, Patricio A.; Hasselfield, Matthew; Hincks, Adam D.; Mroczkowski, Tony; Naess, Sigurd; Niemack, Michael D.; Page, Lyman; Partridge, Bruce; Salatino, Maria; Staggs, Suzanne; Treu, Jesse; Wollack, Edward J.; Xu, Zhilei (2022)
    Fluctuating atmospheric emission is a dominant source of noise for ground-based millimeter-wave observations of the cosmic microwave background (CMB) temperature anisotropy at angular scales ≳0.5°. We present a model of ...

  • Two-year cosmology large angular scale surveyor (CLASS) observations: 40 GHz telescope pointing, beam profile, window function, and polarization performance 

    Xu, Zhilei; Brewer, Michael K.; Rojas, Pedro Fluxá; Li, Yunyang; Osumi, Keisuke; Pradenas, Bastián; Ali, Aamir; Appel, John W.; Bennett, Charles L.; Bustos Placencia, Ricardo; Chan, Manwei; Chuss, David T.; Cleary, Joseph; Couto, Jullianna Denes; Dahal, Sumit; Datta, Rahul; Denis, Kevin L.; Dünner, Rolando; Eimer, Joseph R.; Essinger-Hileman, Thomas; Gothe, Dominik; Harrington, Kathleen; Iuliano, Jeffrey; Karakla, John; Marriage, Tobias A.; Miller, Nathan J.; Núñez, Carolina; Padilla, Ivan L.; Parker, Lucas; Petroff, Matthew A.; Reeves, Rodrigo; Rostem, Karwan; Nunes Valle, Deniz Augusto; Watts, Duncan J.; Weiland, Janet L.; Wollack, Edward J. (2020-03-10)
    The Cosmology Large Angular Scale Surveyor (CLASS) is a telescope array that observes the cosmic microwave background (CMB) over 75% of the sky from the Atacama Desert, Chile, at frequency bands centered near 40, 90, 150, ...

  • Two-year Cosmology Large Angular Scale Surveyor (CLASS) Observations: A First Detection of Atmospheric Circular Polarization at Q band 

    Petroff, Matthew A.; Eimer, Joseph R.; Harrington, Kathleen; Ali, Aamir; Appel, John W.; Bennett, Charles L.; Brewer, Michael K.; Bustos Placencia, Ricardo; Chan, Manwei; Chuss, David T.; Cleary, Joseph; Denes Couto, Jullianna; Dahal, Sumit; Dünner, Rolando; Essinger-Hileman, Thomas; Fluxá Rojas, Pedro; Gothe, Dominik; Iuliano, Jeffrey; Marriage, Tobias A.; Miller, Nathan J.; Núñez, Carolina; Padilla, Ivan L.; Parker, Lucas; Reeves, Rodrigo; Rostem, Karwan; Nunes Valle, Deniz Augusto; Watts, Duncan J.; Weiland, Janet L.; Wollack, Edward J.; Xu, Zhilei (2020-02-01)
    The Earth’s magnetic field induces Zeeman splitting of the magnetic dipole transitions of molecular oxygen in the atmosphere, which produces polarized emission in the millimeter-wave regime. This polarized emission ...

  • Two-year Cosmology Large Angular Scale Surveyor (CLASS) Observations: A Measurement of Circular Polarization at 40 GHz 

    Padilla, Ivan L.; Eimer, Joseph R.; Li, Yunyang; Addison, Graeme E.; Ali, Aamir; Appel, John W.; Bennett, Charles L.; Bustos Placencia, Ricardo; Brewer, Michael K.; Chan, Manwei; Chuss, David T.; Cleary, Joseph; Couto, Jullianna Denes; Dahal, Sumit; Denis, Kevin; Dünner, Rolando; Essinger-Hileman, Thomas; Fluxá, Pedro; Gothe, Dominik; Haridas, Saianeesh K.; Harrington, Kathleen; Iuliano, Jeffrey; Karakla, John; Marriage, Tobias A.; Miller, Nathan J.; Núñez, Carolina; Parker, Lucas; Petroff, Matthew A.; Reeves, Rodrigo; Rostem, Karwan; Stevens, Robert W.; Nunes Valle, Deniz Augusto; Watts, Duncan J.; Weiland, Janet L.; Wollack, Edward J.; Xu, Zhilei (2020-02-01)
    We report measurements of circular polarization from the first two years of observation with the 40 GHz polarimeter of the Cosmology Large Angular Scale Surveyor (CLASS). CLASS is conducting a multi-frequency survey ...