## CLASS 40 GHz 2016 - 2022 Observations (DR1): Combined ProductsDownload Links:Descriptions of the four products are as follows. More details specific to these products are given in Shi et al. (2024). ## Combined Data MapsCoordinate System:
Celestial
Projection Type:
HEALPix, ring, Nside=256
Resolution:
1
^{°}The combined Stokes Q and U maps made with CLASS 40 GHz and WMAP Q-band data. The combined maps cover roughly 73% of the sky, with declination coverage -75° < δ < +29°. Polarization maps are provided in one FITS file that contains the Q and U maps constructed using the CLASS DR1 40 GHz coadd and the 9-year WMAP Q-band data. ## Combined Noise SimulationsCoordinate System:
Celestial
Projection Type:
HEALPix, ring, Nside=256
Resolution:
1
^{°}The Stokes Q and U noise simulations for the combined maps, constructed by combining the CLASS DR1 40 GHz noise simulations and the WMAP Q-band noise simulations in the same way as for the data. The CLASS noise simulations can be obtained from the CLASS products on LAMBDA. The WMAP Q-band noise simulations were created (at Nside=256) based on the noise covariance matrices, following the method introduced in Larson et al. (2011). There are 200 noise simulations for the combined maps. ## Combined Weights RelatedThe combined weights related products, including: the inverse of the filtering matrix diagonal, the fractional error on the
filtering-matrix-corrected spherical harmonic coefficients, the WMAP Q-band data weights and the CLASS 40 GHz-band data weig
hts.
The E-modes and B-modes elements are provided at different columns, and are indexed the same as the healpy alm with ℓ ## Polarized Synchrotron Spectral Index MapCoordinate System:
Galactic
Projection Type:
HEALPix, ring, Nside=32
Resolution:
7
^{°}The polarized synchrotron spectral index (β ## Additional Information:Sensitivity-Improved Polarization Maps at 40 GHz with CLASS and WMAP data, Shi et al. (2024) CLASS Data Pipeline and Maps for 40 GHz Observations through 2022, Li et al. (2023) CLASS Angular Power Spectra and Map-Component Analysis for 40 GHz Observations through 2022 Eimer et al. (2023) |