# The Temperature of the Cosmic Microwave Background

## TL;DR

This paper recalibrates FIRAS data with WMAP to precisely measure the CMB temperature at approximately 2.726 K, reviewing existing measurements and providing an updated, highly accurate value.

## Contribution

It introduces an independent recalibration method combining FIRAS and WMAP data to refine the CMB temperature measurement.

## Key findings

- CMB temperature determined as 2.7260 +/- 0.0013 K
- Literature review yields a temperature of 2.72548 +/- 0.00057 K
- Enhanced precision in CMB temperature measurement

## Abstract

The FIRAS data are independently recalibrated using the WMAP data to obtain a CMB temperature of 2.7260 +/- 0.0013. Measurements of the temperature of the cosmic microwave background are reviewed. The determination from the measurements from the literature is cosmic microwave background temperature of 2.72548 +/- 0.00057 K.