A medium-scale measurement of the cosmic microwave background at 3.3 millimeters
A system has been developed for making measurements of spatial fluctuations in the cosmic microwave background radiation, on an angular scale of 5 arcmin to a few degrees. The system consists of an off-axis Gregorian telescope with a nearly Gaussian response with FWHM adjustable from 20 to 50 arcmin...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19910042473 2023-05-15T18:22:02+02:00 A medium-scale measurement of the cosmic microwave background at 3.3 millimeters Meinhold, Peter Lubin, Philip Unclassified, Unlimited, Publicly available Mar 20, 1991 http://ntrs.nasa.gov/search.jsp?R=19910042473 unknown http://ntrs.nasa.gov/search.jsp?R=19910042473 Accession ID: 91A27096 Copyright Other Sources 90 Astrophysical Journal, Part 2 - Letters; 370; L11-L14 1991 ftnasantrs 2012-02-15T18:58:27Z A system has been developed for making measurements of spatial fluctuations in the cosmic microwave background radiation, on an angular scale of 5 arcmin to a few degrees. The system consists of an off-axis Gregorian telescope with a nearly Gaussian response with FWHM adjustable from 20 to 50 arcmin, an SIS coherent receiver operating at 3.3 mm, and a pointing system capable of better than 1 arcmin rms stabilization. This paper reports on results from the system's first balloon flight in August 1988, and ground-based measurements made from the South Pole in December 1988. A portion of the South Pole data is used to place a 95-percent confidence level upper limit of Delta T/T less than 0.000035 for Gaussian sky fluctuations in the background radiation at 20-arcmin angular scale and a limit of Delta T/T less than 0.000033 on overall excess intrinsic sky noise. In addition, dust contamination in cosmic background radiation data is estimated using measurements of the Galaxy from this flight and a previous one, along with the IRAS 100-micron map. These anisotropy results give the most stringent limits on cold dark matter theories to date. Other/Unknown Material South pole NASA Technical Reports Server (NTRS) South Pole |
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NASA Technical Reports Server (NTRS) |
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90 Meinhold, Peter Lubin, Philip A medium-scale measurement of the cosmic microwave background at 3.3 millimeters |
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90 |
description |
A system has been developed for making measurements of spatial fluctuations in the cosmic microwave background radiation, on an angular scale of 5 arcmin to a few degrees. The system consists of an off-axis Gregorian telescope with a nearly Gaussian response with FWHM adjustable from 20 to 50 arcmin, an SIS coherent receiver operating at 3.3 mm, and a pointing system capable of better than 1 arcmin rms stabilization. This paper reports on results from the system's first balloon flight in August 1988, and ground-based measurements made from the South Pole in December 1988. A portion of the South Pole data is used to place a 95-percent confidence level upper limit of Delta T/T less than 0.000035 for Gaussian sky fluctuations in the background radiation at 20-arcmin angular scale and a limit of Delta T/T less than 0.000033 on overall excess intrinsic sky noise. In addition, dust contamination in cosmic background radiation data is estimated using measurements of the Galaxy from this flight and a previous one, along with the IRAS 100-micron map. These anisotropy results give the most stringent limits on cold dark matter theories to date. |
format |
Other/Unknown Material |
author |
Meinhold, Peter Lubin, Philip |
author_facet |
Meinhold, Peter Lubin, Philip |
author_sort |
Meinhold, Peter |
title |
A medium-scale measurement of the cosmic microwave background at 3.3 millimeters |
title_short |
A medium-scale measurement of the cosmic microwave background at 3.3 millimeters |
title_full |
A medium-scale measurement of the cosmic microwave background at 3.3 millimeters |
title_fullStr |
A medium-scale measurement of the cosmic microwave background at 3.3 millimeters |
title_full_unstemmed |
A medium-scale measurement of the cosmic microwave background at 3.3 millimeters |
title_sort |
medium-scale measurement of the cosmic microwave background at 3.3 millimeters |
publishDate |
1991 |
url |
http://ntrs.nasa.gov/search.jsp?R=19910042473 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19910042473 Accession ID: 91A27096 |
op_rights |
Copyright |
_version_ |
1766201385308651520 |