A Search for Small-Scale Anisotropy in the Cosmic Microwave Background

view Abstract Citations (60) References (7) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS A Search for Small-Scale Anisotropy in the Cosmic Microwave Background Tucker, G. S. ; Griffin, G. S. ; Nguyen, H. T. ; Peterson, J. B. Abstract We report the preliminary result of a search for cosmic microwave background (CMB) anisotropy. We made observations using a specially designed radiometer and on-axis Cassegrain telescope. The beam size was 12' at a frequency of 90 GHz. Observations were made during 1993 January from the South Pole. We observed five regions of sky near declination -75^deg^, and set a 95% confidence level upper limit of {DELTA}T < 2.3 x 10^-5^T_CMB_ on Gaussian-correlated CMB anisotropy at an angular scale of 0.15^deg^. This is the lowest upper limit to date on CMB anisotropy at this angular scale. Publication: The Astrophysical Journal Pub Date: December 1993 DOI: 10.1086/187133 Bibcode: 1993ApJ...419L..45T Keywords: COSMOLOGY: COSMIC MICROWAVE BACKGROUND; COSMOLOGY: OBSERVATIONS full text sources ADS |