CMB Lensing Reconstruction Using Two Years of Temperature Data from the SPT-3G Summer Survey

Abstract

We present the first reconstruction of the cosmic microwave background (CMB) lensing potential from the SPT-3G Summer survey using two years of temperature data. The Summer survey has a total area of approximately 2640 deg${}^2$, split into three fields covering 1210, 570, and 860 deg${}^2$, respectively. A joint analysis of the three Summer fields yields a lensing amplitude of $A^{\mathrm{comb}}=1.015\pm 0.053$ relative to a fiducial Planck 2018 $\hat{I}›$CDM cosmology for the multipole range $50<L<2000$. These early results from the SPT-3G Summer survey highlight the potential for increasing the signal-to-noise ratio when combining the Summer fields with the SPT-3G Main and Wide fields for a total SPT-3G survey area of $\sim$ 10,000 deg${}^2$.

36 pages, 6 figures, Submitted to JCAP