2000/11/11 by G. Romeo, Romeo, G., Sk Zeeshan Ali +15
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics (astro-ph) #Astrophysics and Star Formation Studies #FOS: Physical sciences #Superconducting and THz Device Technology #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0011226
4 pages, 3 figure, 1 table. Submitted to APJ Letters, accepted 11/3/2000
arxiv created 2000/11/11 · openalex publication_date 2000/11/11 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Results from the third campaign of a ground-based multi-band observation of the millimeter emission of the sky from Tenerife (Canary Islands) are presented. The instrument consists of a 0.45 meter diameter off-axis telescope equipped with a 4-band multi-mode 3He cooled photometer working at 1.1, 1.3, 2.1 and 3.1\notetoeditorThese are effective wavelengths mm wavelengths. The beam is well approximated by a Gaussian with 1% o.35 Full Width Half Maximum (FWHM) at all wavelengths. The wide wavelength coverage of our instrument allows us to characterize and reduce both the atmospheric and galactic contamination in our data. The CMBR data is analyzed in 6 multipole bands whose centers span the range ℓ=39 to ℓ =134 at the two longest wavelengths (2.1 and 3.1 mm). A likelihood analysis indicates that we have detected fluctuations in all bands at the two wavelengths. We have evidence of a rise in the angular power spectrum from low ℓ to high ℓ . Our measured spectrum is consistent with current popular theories of large scale structure formation, COBE, and other recent balloon-borne experiments with similar wavelength coverage.