The anisotropy of the microwave background to l = 3500: Mosaic observations with the cosmic background imager
Author
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Pearson, T. J.
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Mason, B. S.
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Readhead, A. C.S.
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Shepherd, M. C.
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Sievers, J. L.
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Udomprasert, P. S.
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Cartwright, J. K.
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Farmer, A. J.
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Padin, S.
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Myers, S. T.
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Bond, J. R.
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Contaldi, C. R.
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Pen, U. L.
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Prunet, S.
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Pogosyan, D.
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Carlstrom, J. E.
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Kovac, J.
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Leitch, E. M.
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Pryke. C.
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Halverson, N. W.
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Holzapfel, W. L.
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Altamirano, P.
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Bronfman Aguiló, Leonardo
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Casassus Montero, Simón
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May, J.
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Joy, M.
Admission date
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2019-01-29T13:47:41Z
Available date
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2019-01-29T13:47:41Z
Publication date
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2003
Cita de ítem
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Astrophysical Journal, Volumen 591, Issue 2 I, 2003, Pages 556-574
Identifier
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15384357
Identifier
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0004637X
Identifier
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10.1086/375508
Identifier
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https://repositorio.uchile.cl/handle/2250/159787
Abstract
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Using the Cosmic Background Imager (CBI), a 13-element interferometer array operating in the 26-36 GHz frequency band, we have observed 40 deg 2 of sky in three pairs of fields, each ∼1457prime; × 165′, using overlapping pointings (mosaicking). We present images and power spectra of the cosmic microwave background radiation in these mosaic fields. We remove ground radiation and other low-level contaminating signals by differencing matched observations of the fields in each pair. The primary foreground contamination is due to point sources (radio galaxies and quasars). We have subtracted the strongest sources from the data using higher resolution measurements, and we have projected out the response to other sources of known position in the power spectrum analysis. The images show features on scales ∼6′-15′, corresponding to masses ∼(5-80) × 10 14 M⊙ at the surface of last scattering, which are likely to be the seeds of clusters of galaxies.