Four-year Cosmology Large Angular Scale Surveyor (CLASS) Observations: On-sky Receiver Performance at 40, 90, 150, and 220 GHz Frequency Bands

Sumit Dahal, John W. Appel, Rahul Datta +37

The Cosmology Large Angular Scale Surveyor (CLASS) observes the polarized cosmic microwave background (CMB) over the angular scales of 1${}^{\circ }\lesssim \theta \le$ 90${}^{\circ }$ with the…