WMAP Effective Frequency Calculator

The data made available through this page has been updated. The most recent version of this data may be accessed through /product/map/current/

This tool calculates the effective frequency in GHz of each bandpass for a given spectral index. The algorithm and underlying parameters come from Jarosik, etal, 2003, ApJS 145, p413.

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.
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