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

https://doi.org/10.3847/1538-4357/ab64e2

Petroff, Matthew A.; Eimer, Joseph R.; Harrington, Kathleen; Ali, Aamir; Appel, John W.; Bennett, Charles L.; Brewer, Michael K.; Bustos, Ricardo; Chan, Manwei; Chuss, David T.; et al (February 2020, The Astrophysical Journal)

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Two-year Cosmology Large Angular Scale Surveyor (CLASS) Observations: 40 GHz Telescope Pointing, Beam Profile, Window Function, and Polarization Performance

https://doi.org/10.3847/1538-4357/ab76c2

Xu, Zhilei; Brewer, Michael K.; Rojas, Pedro Fluxá; Li, Yunyang; Osumi, Keisuke; Pradenas, Bastián; Ali, Aamir; Appel, John W.; Bennett, Charles L.; Bustos, Ricardo; et al (March 2020, The Astrophysical Journal)

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

https://doi.org/10.3847/1538-4357/ab61f8

Padilla, Ivan L.; Eimer, Joseph R.; Li, Yunyang; Addison, Graeme E.; Ali, Aamir; Appel, John W.; Bennett, Charles L.; Bustos, Ricardo; Brewer, Michael K.; Chan, Manwei; et al (February 2020, The Astrophysical Journal)

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Venus Observations at 40 and 90 GHz with CLASS

https://doi.org/10.3847/PSJ/abedad

Dahal, Sumit; Brewer, Michael K.; Appel, John W.; Ali, Aamir; Bennett, Charles L.; Bustos, Ricardo; Chan, Manwei; Chuss, David T.; Cleary, Joseph; Couto, Jullianna D.; et al (April 2021, The Planetary Science Journal)

Abstract Using the Cosmology Large Angular Scale Surveyor, we measure the disk-averaged absolute Venus brightness temperature to be 432.3 ± 2.8 K and 355.6 ± 1.3 K in theQandWfrequency bands centered at 38.8 and 93.7 GHz, respectively. At both frequency bands, these are the most precise measurements to date. Furthermore, we observe no phase dependence of the measured temperature in either band. Our measurements are consistent with a CO₂-dominant atmospheric model that includes trace amounts of additional absorbers like SO₂and H₂SO₄.
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On-sky Performance of the CLASS Q -band Telescope

https://doi.org/10.3847/1538-4357/ab1652

Appel, John W.; Xu, Zhilei; Padilla, Ivan L.; Harrington, Kathleen; Marquez, Bastián Pradenas; Ali, Aamir; Bennett, Charles L.; Brewer, Michael K.; Bustos, Ricardo; Chan, Manwei; et al (May 2019, The Astrophysical Journal)

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