SPT-3G Data Products

SPT-3G D1 High-ell Power Spectrum and Likelihood

This page provides data products associated with the SPT-3G D1 measurement of the CMB TT high ℓ power spectra, as described in Chaubal et al. 2026.

The SPT-3G D1 data set comprises observations from 2019 and 2020 of the SPT-3G Main field, covering the 95, 150, and 220 GHz frequency bands.

The released data include TT band powers spanning the angular multipole range 1700 < ℓ < 11,000, across the six frequency combinations (95x95 GHz, …).

If you have any questions regarding this data set or its use, please contact Prakrut Chaubal, Nick Huang or Christian Reichardt (prakrutchaubal_at_gmail_dot_com, ndhuang_at_berkeley_dot_edu, christian_dot_reichardt_at_unimelb_dot_edu_dot_au).

Bandpowers

For plotting purposes only, we provide a text file whose columns are (index, ell, Dl, sigmaDl) and rows are the bandpowers in order with all 95x95 GHz bandpowers, followed by all 95x150 GHz, 95x220 GHz, 150x150 GHz, 150x220 GHz, 220x220 GHz.

Likelihood Code

We provide the likelihood code, data files, and an example python notebook invoking the likelihood with the cobaya sampler in a tarball.

Additional Details:

• Information on this page was taken from this SPT site