Jodrell Bank-IAC

Dicker et al. (JBIAC-large-angle) and Harrison et al. (JBIAC-small-angle) use 33 GHz data from the ground-based Jodrell Bank-IAC interferometer experiment on Tenerife, in conjunction with foreground contamination data, to constrain CMBR anisotropy.

Dicker et al. and Harrison et al. provide analytic fits to their zero-lag window functions (note that the normalization in eq. (6) of Dicker et al. should be 0.0677, not 0.677). The large-angle zero-lag window function fit is

$$W_\ell = 0.0677 {\rm exp}\left[ - (\ell - 109) (\ell - 110) / 730\right] , \eqno(1)$$

and the small-angle zero-lag window function fit is

$$W_\ell = 0.0377 {\rm exp}\left[ - (\ell - 208) (\ell - 209) / 694\right] . \eqno(2)$$

The first column in the window function file is $\ell$, which runs from 2 to 350. The second column is the large-angle $W_\ell$ and the third column is the small-angle $W_\ell$.

Table: Jodrell Bank-IAC zero-lag Window Function Parameters

	$\ell_{e^{-0.5}}$	$\ell_{\rm e}$	$\ell_{\rm m}$	$\ell_{e^{-0.5}}$	$\sqrt{I(W_\ell)}$
large-angle	90	105.9	109.5	129	0.175
small-angle	190	206.8	208.5	227	0.0922

The quoted bandtemperature values are from Dicker et al. and Harrison et al., with 6.6% added in quadrature to their statistical 1 $\sigma$ error bars to account for the calibration uncertainty. They were computed assuming a flat bandpower spectrum.

Fig.: Jodrell Bank-IAC zero-lag window functions. (Postscript version here.)

REFERENCES

Link to the experiment webpage.

S.R. Dicker, et al., ``Cosmic Microwave Background Observations with the Jodrell Bank-IAC Interferometer at 33 GHz", MNRAS 309, 750 (1999).

D.L. Harrison, et al., ``A Measurement at the First Acoustic Peak of the CMB with the 33 GHz Interferometer", astro-ph/0004357.