We present the results of a diffuse radiation survey carried out at millimeter and submillimeter wavelengths in the Aries and Taurus sky regions. A balloon-borne telescope with 0 degrees.85 FWHM resolution and four millimeterwave bands scanned 147 independent sky directions. From the multiband observations we were able to separate two independent components: thermal emission from cirrus dust and cosmic microwave background (CMB) temperature fluctuations. A statistically significant detection of anisotropies is found in the data of the CMB channel: Delta T-sky = (24 +/- 7) mu K rms (95% CL plus 10% calibration error). Assuming uncorrelated Gaussian temperature fluctuations we find a band averaged estimate of the CMB anisotropy power spectrum C-l = (20 +/- 9) mu K-2 at l similar or equal to 110. The data are consistent with anisotropies in a ''standard'' Omega(b) = 0.05, n = 1 model normalized to the rms anisotropy detected by COBE Differential Microwave Radiometers.
Masi, S., Debernardis, P., de Petris, M., Gervasi, M., Boscaleri, A., Aquilini, E., et al. (1996). Foregrounds removal and CMB fluctuations in a multiband anisotropy experiment: Argo 1993. THE ASTROPHYSICAL JOURNAL, 463(2), L47-L50 [10.1086/310069].
Foregrounds removal and CMB fluctuations in a multiband anisotropy experiment: Argo 1993
GERVASI, MASSIMO;
1996
Abstract
We present the results of a diffuse radiation survey carried out at millimeter and submillimeter wavelengths in the Aries and Taurus sky regions. A balloon-borne telescope with 0 degrees.85 FWHM resolution and four millimeterwave bands scanned 147 independent sky directions. From the multiband observations we were able to separate two independent components: thermal emission from cirrus dust and cosmic microwave background (CMB) temperature fluctuations. A statistically significant detection of anisotropies is found in the data of the CMB channel: Delta T-sky = (24 +/- 7) mu K rms (95% CL plus 10% calibration error). Assuming uncorrelated Gaussian temperature fluctuations we find a band averaged estimate of the CMB anisotropy power spectrum C-l = (20 +/- 9) mu K-2 at l similar or equal to 110. The data are consistent with anisotropies in a ''standard'' Omega(b) = 0.05, n = 1 model normalized to the rms anisotropy detected by COBE Differential Microwave Radiometers.
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