An Instrument for Investigation of the Cosmic Microwave Background Radiation at Intermediate Angular Scales
Edward J. Wollack,Edward J. Wollack,Mark J. Devlin,N. Jarosik,Calvin B. Netterfield,Calvin B. Netterfield,L. Page,David T. Wilkinson +7 more
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In this paper, an off-axis microwave telescope for observations of the anisotropy in the cosmic microwave background (CMB) radiation on angular scales between 05 and 3° is described.Abstract:
We describe an off-axis microwave telescope for observations of the anisotropy in the cosmic microwave background (CMB) radiation on angular scales between 05 and 3°. The receiver utilizes cryogenic high electron mobility transistor (HEMT) amplifiers and detects the total power in multiple 3 GHz wide channels. Both frequency and polarization information are recorded allowing discrimination between CMB radiation and potential foreground sources and allowing checks for systematic effects. The instrumental radiometric offset is small (~1 mK). Data are taken by rapidly sampling while sweeping the beam many beamwidths across the sky. After detection, a spatio-temporal filter is formed in software that optimizes the sensitivity in a multipole band in the presence of atmospheric fluctuations. Observations were made from Saskatoon, Saskatchewan (SK), Canada, during the winter of 1993 with six channels between 27.6 and 34.0 GHz, in 1994 with 12 channels between 27.6 and 44.1 GHz, and in 1995 with six channels between 38.2 and 44.1 GHz. The performance of the instrument and assessment of the atmospheric noise at this site are discussed.read more
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Handbook of Chemistry and Physics
TL;DR: While the book is a standard fixture in most chemical and physical laboratories, including those in medical centers, it is not as frequently seen in the laboratories of physician's offices (those either in solo or group practice), and I believe that the Handbook can be useful in those laboratories.
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Ground-based and Airborne Telescopes III
TL;DR: Cooperating Organizations American Astronomical Society (United States) • Netherlands Institute for Radio Astronomy (ASTRON) (Netherlands) • Ball Aerospace & Technologies Corporation (U.S. as discussed by the authors ).
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A Measurement of the Angular Power Spectrum of the Cosmic Microwave Background from l = 100 to 400
Amber Miller,Robert R. Caldwell,Robert R. Caldwell,Mark J. Devlin,W. B. Dorwart,T. Herbig,M. R. Nolta,Lyman A. Page,J. Puchalla,E. Torbet,H. T. Tran +10 more
TL;DR: In this paper, the angular spectrum of the cosmic microwave background (CMB) was measured at 144 GHz from Cerro Toco in the Chilean altiplano, where the authors found that the anisotropy at l ≈ 200 has the spectrum of CMB.
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Radical Compression of Cosmic Microwave Background Data
TL;DR: This work presents a method for approximating the likelihood that takes power spectrum constraints, e.g., "band-powers," as inputs and advocates the calculation of this third quantity by experimenters, to be presented along with the maximum-likelihood band-power and variance.
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Towards a free–free template for CMB foregrounds
TL;DR: In this paper, a full-sky template map of the Galactic free-free foreground emission component is presented for high sensitivity CMB experiments using the recently published Hα data of both the northern and southern skies as the basis for such a template.
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CRC Handbook of Chemistry and Physics
TL;DR: CRC handbook of chemistry and physics, CRC Handbook of Chemistry and Physics, CRC handbook as discussed by the authors, CRC Handbook for Chemistry and Physiology, CRC Handbook for Physics,
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Electrodynamics of continuous media
TL;DR: In this article, the propagation of electromagnetic waves and X-ray diffraction of X rays in crystals are discussed. But they do not consider the effects of superconductivity on superconducting conductors.
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