Results From MAT: Localizing a Peak in the CMB Angular Spectrum to $l\approx 200$
A. D. Miller, R. Caldwell, M. J. Devlin, W. B. Dorwart, T. Herbig, M. R. Nolta, L. A. Page, J. Puchalla, E. Torbet, and H. T. Tran
Department of Physics, Princeton University, Princeton, NJ,
and Departments of Physics and Astronomy, University of Pennsylvania,
Philadelphia, PA USA


Abstract:
We report results from the 1997 and 1998 observing seasons of the Mobile Anisotropy Telescope. We detect anisotropy in the cosmic microwave background on scales from $l\approx 50$ to $l\approx 400$ at 30, 40, and 144 GHz. We find clear evidence for a peak in the spectrum localized at $l \approx 200$ with an amplitude, $\delta T_l \approx 85\mu$K. We find that the data have a spectral index consistent with that of the CMB.