WMAP Data Product Images

The images below represent full-sky maps of the cosmic microwave background anisotropy and foreground signal from our galaxy (in red). The 5 frequency maps are constructed from the differential time-ordered observations of the ten WMAP differencing assemblies. Galactic foreground is stongest in K band, weakest in V and W bands.

Please acknowledge the WMAP Science Team when using these images.

K-Band Map
(23 GHz)
Linear scale from -200 to 200 uK

Ka-Band Map
(33 GHz)
Linear scale from -200 to 200 uK

Q-Band Map
(41 GHz)
Linear scale from -200 to 200 uK

V-Band Map
(61 GHz)
Linear scale from -200 to 200 uK

W-Band Map
(94 GHz)
Linear scale from -200 to 200 uK

Three-color combination images from the WMAP Q, V and W-band data. The dipole and high Galactic latitude anisotropy are visible.

Please acknowledge the WMAP Science Team when using these images.

Dipole Subtracted
Linear scale from -1 to 1 mK

Dipole Included
Linear scale from -3.5 to 3.5 mK

The CMB angular power spectrum for WMAP, COBE, ACBAR, and CBI data. Note that the WMAP results are consistent with the other experiments, and that the combined WMAP and CBI points constrain the angular power spectrum of our sky with great accuracy and precision. The WMAP best fit model is also shown.

Please acknowledge the WMAP Science Team when using these images.

TT and TE Cross-Power Spectra

The Internal Linear Combination Map is a weighted linear combination of the five WMAP frequency maps. The weights are computed using criteria which minimize the Galactic foreground contribution to the sky signal. The resultant map provides a low-contamination image of the CMB anisotropy.

Please acknowledge the WMAP Science Team when using these images.

Internal Linear Combination Map
Linear scale from -200 to 200 uK

The synchrotron, free-free and thermal dust foreground models derived from WMAP data using the Maximum Entropy Method (MEM) are shown at the frequencies where each foreground is most dominant.

Please acknowledge the WMAP Science Team when using these images.

Synchrotron map for K band
Linear scale from -1 to 5 mK

Free-free map for K band
Linear scale from -1.0 to 4.7 mK

Dust map for W band
Linear scale from -0.5 to 2.3 mK

Three-color maps from the Maximum Entropy Method (MEM) model for the 5 WMAP frequency bands. These maps indicate which emission mechanism dominates as a function of frequency and sky position. Synchrotron is red, free-free is green, and thermal dust is blue.

Please acknowledge the WMAP Science Team when using these images.

K-Band Map
(23 GHz)
Logarithmic scale

Ka-Band Map
(33 GHz)
Logarithmic scale

Q-Band Map
(41 GHz)
Logarithmic scale

V-Band Map
(61 GHz)
Logarithmic scale

W-Band Map
( 94 GHz)
Logarithmic scale

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JPEG (307 Kb)
JPEG (1.15 Mb)

A guide to the microwave sky for reference. This picture shows the large-scale emission from the Milky Way galaxy, including some of its notable components such as the Cygnus complex, the North Polar Spur, the Gum region, etc. The small circles show positions of significant microwave point sources. The brighter sources are labeled for reference.

Please acknowledge the WMAP Science Team when using these images.

Microwave sky overlay

WMAP uses a set of standard sky masks for certain data processing and analysis needs. The masking is based on the K-band signal levels, which each successive mask increasing the severity of the masking cut. The most severe cut is Kp0. Not shown are additional cuts made around point sources.

Please acknowledge the WMAP Science Team when using these images.

Intensity Masks

WMAP uses in-flight observations of Jupiter to characterize the beam for each antenna feed. Window functions are computed from these observations for each of the ten differencing assemblies.

Please acknowledge the WMAP Science Team when using these images.

Side A Focal Plane Mosaic
Each beam response has been normalized to its peak value.
Linear scale from -.5 to 1

Side B Focal Plane Mosaic
Each beam response has been normalized to its peak value.
Linear scale from -0.5 to 1

WMAP Window Functions