WMAP DR3 Sky Maps Per Differencing Assembly

The data made available through this page has been updated. The most recent version of this data may be accessed through https://lambda.gsfc.nasa.gov/product/wmap/current/"

Coordinate System:
Projection Type:
HEALPix, nested, res 9 (Nside=512) and res 10 (Nside=1024)
0.23°- 0.93° (frequency dependent)
Download Links:

Iterative algorithms are used to create skymaps from the calibrated differential time-ordered WMAP data for each of the ten differencing assemblies. Each pixel in a map represents a sky temperature for the bandpass appropriate to the differencing assembly. The CMB dipole has been removed from the Stokes I maps.

Maps for each year of WMAP data have been supplied through LAMBDA. Full five year maps were produced by performing a weighted, pixel-by-pixel, mean of the five single year maps; the N_Obs measurement was used to weight this mean. For the Stokes I maps, the mean temperature outside of a preliminary version of the temperature analysis/KQ85 mask was subtracted from each single year map before the five year weighted mean was calculated. The zero point of each five year Stokes I map has been set using a Galactic csc |b| model. The zero level of each single year map has not been set, and is not a meaningful quantity. The N_Obs measurements were added together to produce the final N_Obs measurement. In addition, the full five year Stokes I maps have been smoothed to 1° resolution and are supplied as a separate data product.

Single year Stokes I maps are HEALPix Res 10 (Nside 1024) are supplied to support high-l TT analysis.

ISigmas 1.436 1.470 2.254 2.141 3.314 2.953 5.899 6.565 6.926 6.761
PSigmas 1.453 1.488 2.278 2.163 3.341 2.975 5.929 6.602 6.964 6.800

Additional Information

Back To WMAP DR3: Full Resolution Seven Year Sky Maps

A service of the HEASARC and of the Astrophysics Science Division at NASA/GSFC
Goddard Space Flight Center, National Aeronautics and Space Administration
HEASARC Director: Dr. Andrew F. Ptak
LAMBDA Director: Dr. Thomas M. Essinger-Hileman
NASA Official: Dr. Thomas M. Essinger-Hileman
Web Curator: Mr. Michael R. Greason