WMAP Effective Frequency Calculator

This tool calculates the effective frequency in GHz of each bandpass for a given spectral index. Documentation of the algorithm and underlying parameters may be found here.

Enter the desired indices above; the underlying parameters assume
indices between -3 and 1. Multiple indices may be entered by
separating them with spaces or commas.

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