A precise knowledge of spatial distribution, level and frequency spectrum of the Galactic Diffuse Background is essential in measurements of the CMB to subtract its contribution to the sky signal collected by the antenna. Because data in literature do not have the necessary accuracy, CMB observation must include ad hoc measurements of the galactic foreground. We present new measurements of the spectral index of the galactic diffuse radiation between 0.6 and 2.5 GHz made by TRIS, a set of three radiometers we use to look for deviations from a Planck distribution in the spectrum of the CMB at frequencies close to 1 GHz.
Zannoni, M., Battistelli, E., Boella, G., Gervasi, M., Sironi, G. (2005). The Spectral Index of the Galactic Foreground Affecting CMB Measurements. In New Cosmological Data and the Values of the Fundamental Parameters (pp.538-539). Ann Arbor : Astronomical Society of the Pacific.
The Spectral Index of the Galactic Foreground Affecting CMB Measurements
ZANNONI, MARIO;BOELLA, GIULIANO FILIPPO;GERVASI, MASSIMO;SIRONI, GIORGIO
2005
Abstract
A precise knowledge of spatial distribution, level and frequency spectrum of the Galactic Diffuse Background is essential in measurements of the CMB to subtract its contribution to the sky signal collected by the antenna. Because data in literature do not have the necessary accuracy, CMB observation must include ad hoc measurements of the galactic foreground. We present new measurements of the spectral index of the galactic diffuse radiation between 0.6 and 2.5 GHz made by TRIS, a set of three radiometers we use to look for deviations from a Planck distribution in the spectrum of the CMB at frequencies close to 1 GHz.
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