A Spin‐modulated Telescope to Make Two‐dimensional Cosmic Microwave Background Maps | Zendy

J. Staren | Zendy; P. R. Meinhold | Zendy; Jeffrey Childers | Zendy; Mark D. Lim | Zendy; Alan Levy | Zendy; P. M. Lubin | Zendy; M. D. Seiffert | Zendy; T. Gaier | Zendy; Newton Figueiredo | Zendy; T. Villela | Zendy; C. A. Wuensche | Zendy; Max Tegmark | Zendy; A. de OliveiraCosta | Zendy

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A Spin‐modulated Telescope to Make Two‐dimensional Cosmic Microwave Background Maps

Author(s) -

J. Staren,

P. R. Meinhold,

Jeffrey Childers,

Mark D. Lim,

Alan Levy,

P. M. Lubin,

M. D. Seiffert,

T. Gaier,

Newton Figueiredo,

T. Villela,

C. A. Wuensche,

Max Tegmark,

A. de OliveiraCosta

Publication year - 2000

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/309236

Subject(s) - cosmic microwave background , physics , sky , telescope , microwave , planck , astrophysics , south pole telescope , cosmic cancer database , noise (video) , astronomy , optics , anisotropy , remote sensing , geology , quantum mechanics , artificial intelligence , computer science , image (mathematics)

We describe the HEMT Advanced Cosmic Microwave Explorer (HACME), a balloonborne experiment designed to measure sub-degree scale Cosmic MicrowaveBackground anisotropy over hundreds of square degrees, using a unique twodimensional scanning strategy. A spinning flat mirror that is canted relativeto its spin axis modulates the direction of beam response in a nearlyelliptical path on the sky. The experiment was successfully flown in Februaryof 1996, achieving near laboratory performance for several hours at floataltitude. A map free of instrumental systematic effects is produced for a 3.5hour observation of 630 square degrees, resulting in a flat band power upperlimit of (l(l+1)C_l/2 pi)^0.5 < 77 microK at l = 38 (95% confidence). Theexperiment design, flight operations and data, including atmospheric effectsand noise performance, are discussed.Comment: 4 pages, 3 figure

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