A Measurement of the Angular Power Spectrum of the Microwave Background Made from the High Chilean Andes
@article{Torbet1999AMO, title={A Measurement of the Angular Power Spectrum of the Microwave Background Made from the High Chilean Andes}, author={E. B. Torbet and Mark J. Devlin and W. B. Dorwart and Thomas Herbig and A. D. Miller and Michael R. Nolta and Lyman A. Page and Jason L. Puchalla and Huan T. Tran}, journal={The Astrophysical Journal Letters}, year={1999}, volume={521}, pages={L79 - L82} }
We report on a measurement of the angular spectrum of the anisotropy of the microwave sky at 30 and 40 GHz between l = 50 and l = 200. The data, covering roughly 600 deg2, support a rise in the angular spectrum to a maximum with δTl ≈ 85 μK at l = 200. We also give a 2 σ upper limit of δTl < 122 μK at l = 432 at 144 GHz. These results come from the first campaign of the Mobile Anisotropy Telescope on Cerro Toco, Chile. To assist in assessing the site, we present plots of the fluctuations in…
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References
SHOWING 1-10 OF 23 REFERENCES
A Measurement of the Angular Power Spectrum of the Anisotropy in the Cosmic Microwave Background
- Physics
- 1997
We report on a measurement of the angular power spectrum of the anisotropy in the cosmic microwave background (CMB). The anisotropy is measured in 23 different multipole bands from l = 54 (≈ 3°) to l…
Mapping the Cosmic Microwave Background Anisotropy:The First Flight of the QMAP Experiment
- PhysicsThe Astrophysical Journal
- 1998
We report on the first flight of the balloon-borne QMAP experiment. The experiment is designed to make a map of the cosmic microwave background (CMB) anisotropy on angular scales from 0.°70 to…
An Instrument for Investigation of the Cosmic Microwave Background Radiation at Intermediate Angular Scales
- Physics
- 1997
We describe an off-axis microwave telescope for observations of the anisotropy in the cosmic microwave background (CMB) radiation on angular scales between 0.°5 and 3°. The receiver utilizes…
Galactic Microwave Emission at Degree Angular Scales
- Physics
- 1997
We cross-correlate the Saskatoon Ka- and Q-band cosmic microwave background (CMB) data with different maps to quantify possible foreground contamination. We detect a marginal correlation (≳2 σ) with…
Cosmological-parameter determination with microwave background maps.
- PhysicsPhysical review. D, Particles and fields
- 1996
This work uses a covariance-matrix approach to estimate the precision with which cosmological parameters can be determined by a CMB temperature map as a function of the fraction of sky mapped, the level of pixel noise, and the angular resolution.
The physics of microwave background anisotropies
- PhysicsNature
- 1997
The residual radiation from the Big Bang is observable as the cosmic microwave background–a near-uniform sea of photons with an average temperature of 2.7 K. Small variations in the temperature of…
Estimating the power spectrum of the cosmic microwave background
- Mathematics
- 1998
We develop two methods for estimating the power spectrum, C_l, of the cosmic microwave background (CMB) from data and apply them to the COBE/DMR and Saskatoon datasets. One method involves a direct…
Cosmic-structure constraints from a one-degree microwave-background anisotropy experiment.
- PhysicsPhysical review letters
- 1991
Using a Bayesian analysis to constrain the amplitude of the perturbation spectrum, it is shown that adiabatic hot-dark-matter models are convincingly ruled out and cold- dark- Matter models have anisotropies near the derived limits.
How to measure CMB power spectra without losing information
- Physics
- 1997
A new method for estimating the angular power spectrum C_l from cosmic microwave background (CMB) maps is presented, which has the following desirable properties:
(1) It is unbeatable in the sense…