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2000MNRAS.313..689G - Mon. Not. R. Astron. Soc., 313, 689-702 (2000/April-3)
1°- and 2°.5-scale interferometric surveys in the northern sky at 5GHz.
GIARDINO G., ASAREH H., MELHUISH S.J., DAVIES R.D., DAVIS R.J. and JONES A.W.
Abstract (from CDS):
We have used the Green Bank 5-GHz catalogue to model point source contributions, for subtraction from the survey at each spacing. The resulting rms signal measured at intermediate and high Galactic latitudes, in directions away from strong extragalactic sources, is 50±6µK at the shorter spacing and 54±3µK at the longer spacing. Allowing for the interferometer window function and a contribution arising from uncorrected point source variability, these values correspond to intrinsic rms levels of 373±55 and 1080±120µK for narrow and wide spacings. We compare these values with measurements at 10GHz, and conclude that between these frequencies the Galactic spectrum is predominantly synchrotron in nature. Further comparison with the Tenerife experiments, sensitive to different angular scales, suggests that the angular power spectrum is flat (ℓ–2) over the observed ℓ-range.
Abstract Copyright: 2000, Royal Astronomical Society
Journal keyword(s): methods: observational - techniques: interferometric - surveys - cosmic microwave background - cosmology: observations - radio continuum: general
Simbad objects: 12
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