SPT-3G Data ProductsSPTpol/SPT-3G/Herschel-SPIRE tSZ Power SpectrumDownload Links:
This page provides data products associated with the thermal Sunyaev Zel’dovich (tSZ) power spectrum measurement using observations from the SPTpol/SPT-3G/Herschel-SPIRE surveys over roughly 100 square degrees described in Raghunathan et al. (2026). The tSZ power spectra are presented over the multipole range 500 < ℓ <= 5000. If you have any questions regarding this data set or its use, please contact Srini Raghunathan (sriniraghuna_at_gmail_dot_com). Please see the jupyter notebook read_maps_masks_bandpowers_cov.ipynb for help reading the maps and the bandpowers. Maps We provide FITS files containing maps of the tSZ effect reconstructed using observations from multiple frequency bands using SPT and Herschel-SPIRE surveys. Specifically, the observations include 150 GHz data from SPTpol (2012-2016 observing season); 95, 150, and 220 GHz from SPT-3G (2019-20 observing season); and 600 and 857 GHz data from Herschel-SPIRE survey. The patch size is 100 square degrees and the white noise levels correspond to 4.5, 3, and 16 uK-arcmin at 95, 150, and 220 GHz bands. The tSZ maps are reconstructed using the harmonic space linear combination technique which combines information from the all the above frequency bands to either reduce (a) the overall variance from noise and foreground variance called the minimum-variance (MV) technique and (b) the contamination from a given foreground signal which in our case is the cosmic infrared background (CIB) minimized (CIB-min) map. TSZ Bandpowers We provide plain text files containing bandpowers, covariance matrices, and the bandpower window function. Please see the in-files comments and jupyter notebook read_maps_masks_bandpowers_cov.ipynb for details of how to use these files (for example to compare a theoretical model to the binned spectrum measurement). Effective Beam and Filter We provide a .npy file containing the effective beam and filter profiles in 2D. Please see the jupyter notebook read_maps_masks_bandpowers_cov.ipynb for details. tSZ x CIB Cross-correlation Coefficient We provide text files containing the reconstructed tSZ x CIB cross-correlation coefficients, see Section 3.4.1 of Raghunathan et al. (2026). Additional Details:
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