Table 2: Level of contaminations in Jy/sr for the ACT experiment. The first two lines are for the dust emission fluctuations in the 40% cleanest region of the sky when 30% and 100% of the fluctuations remain unremoved. The second two lines are for fluctuations of the 50% unresolved IR galaxies, when they are Poisson distributed and where we also take the correlations into account. In this case, $\sigma _{\rm tot}^{\rm CIB}=\sqrt {5 \times \sigma _{\rm Poisson}^2}$ . The last line represents the fluctuations due to unresolved radio sources when 50% of the background is resolved.
Frequency (GHz) 145 225 265

30% Dust fluctuations 19.65 67.44 128.62

100% Dust fluctuations 89.17 224.79 428.74

Poisson CIB fluctuations 1225.19 5430.84 10 877.9

Poisson+Correlated CIB fluctuations 2739.61 12143.7 24323.7

Radio sources fluctuations 2265.42 2873.19 2821.53

**Table 2:** Level of contaminations in Jy/sr for the ACT experiment. The first two lines are for the dust emission fluctuations in the 40% cleanest region of the sky when 30% and 100% of the fluctuations remain unremoved. The second two lines are for fluctuations of the 50% unresolved IR galaxies, when they are Poisson distributed and where we also take the correlations into account. In this case, $\sigma _{\rm tot}^{\rm CIB}=\sqrt {5 \times \sigma _{\rm Poisson}^2}$ . The last line represents the fluctuations due to unresolved radio sources when 50% of the background is resolved.
Frequency (GHz)	145	225	265
30% Dust fluctuations	19.65	67.44	128.62
100% Dust fluctuations	89.17	224.79	428.74
Poisson CIB fluctuations	1225.19	5430.84	10 877.9
Poisson+Correlated CIB fluctuations	2739.61	12143.7	24323.7
Radio sources fluctuations	2265.42	2873.19	2821.53

Source LaTeX | All tables | In the text

	1 Introduction
	2 Modeling the contaminants
	3 SZ parameters
	4 Planck surveyor case
	5 Future ACT-like SZ surveys
	6 Requirements for SZ observations
	7 Discussion
	8 Conclusion
	References