Proceedings of the Particle Physics and Early Universe Conference (PPEUC).
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Imaging CMB Anisotropies with CAT

Joanne C. Baker

Mullard Radio Astronomy Observatory, Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE, U.K.


The Cambridge Cosmic Anisotropy Telescope (CAT) has recently made the first detailed image of primordial anisotropies in the cosmic microwave background (CMB) radiation at 15 GHz. Preliminary results from CAT observations of a second field are presented here. These new data show excess power on angular scales of spherical harmonic multipoles (i.e. around half a degree), at levels consistent with the first published detection. These two results mark the downturn in the CMB power spectrum establishing the presence of the first Doppler peak, and by constraining its position also limit values of and .

PPEUC Proceedings
Fri Jul 25 11:29:49 BST 1997