WMAP DR3 Foreground Reduced 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/"
HEALPix, nested, res 9 (Nside=512) and res 10 (Nside=1024)
0.23°- 0.93° (frequency dependent)
The foreground reduced skymaps were produced by removing a foreground model from the'unreduced' maps using the Foreground Template Model discussed in Hinshaw, et.al., 2006and Page, et.al, 2006; see those papers for details. Briefly, synchrotron, free-free, and dust emission templates weremodeled and then subtracted from the single year 'unreduced' maps. The goal was to produce a setof maps with the foreground removed while retaining WMAP's noise characteristics.
Because the K and Ka maps were used to produce the foreground models, only Q, V, and W band foreground reduced maps were created and delivered to LAMBDA.
As with the 'unreduced' maps, full three year maps were produced by performing a weighted,pixel-by-pixel, mean of the three single year maps; the N_Obs measurement was used to weight this mean.The N_Obs measurements were added together to produce the final, three year, N_Obs measurement.
The same foreground template model was used to produce foreground reduced high resolution (res 10) V and W maps.