SIMBAD references

2009MNRAS.400..984D - Mon. Not. R. Astron. Soc., 400, 984-994 (2009/December-1)

Follow-up observations at 16 and 33GHz of extragalactic sources from WMAP 3-yr data: I - spectral properties.

DAVIES M.L., FRANZEN T.M.O., DAVIES R.D., DAVIS R.J., FEROZ F., GENOVA-SANTOS R., GRAINGE K.J.B., GREEN D.A., HOBSON M.P., HURLEY-WALKER N., LASENBY A.N., LOPEZ-CANIEGO M., OLAMAIE M., PADILLA-TORRES C.P., POOLEY G.G., REBOLO R., RODRIGUEZ-GONZALVEZ C., SAUNDERS R.D.E., SCAIFE A.M.M., SCOTT P.F., SHIMWELL T.W., TITTERINGTON D.J., WALDRAM E.M., WATSON R.A. and ZWART J.T.L.

Abstract (from CDS):

We present follow-up observations of 97 point sources from the Wilkinson Microwave Anisotropy Probe (WMAP) 3-yr data, contained within the New Extragalactic WMAP Point Source catalogue between -4° ≤ δ ≤ 60°; the sources form a flux-density-limited sample complete to 1.1Jy (~5σ) at 33GHz. Our observations were made at 16GHz using the Arcminute Microkelvin Imager and at 33GHz with the Very Small Array (VSA).

94 of the sources have reliable, simultaneous - typically a few minutes apart - observations with both telescopes. The spectra between 13.9 and 33.75GHz are very different from those of bright sources at low frequency: 44 per cent have rising spectra (α33.7513.9< 0.0), where S ∝ ν–α, and 93 per cent have spectra with α33.7513.9< 0.5; the median spectral index is 0.04.

For the brighter sources, the agreement between VSA and WMAP 33-GHz flux densities averaged over sources is very good. However, for the fainter sources, the VSA tends to measure lower values for the flux densities than WMAP. We suggest that the main cause of this effect is the Eddington bias arising from variability.


Abstract Copyright: © 2009 The Authors. Journal compilation © 2009 RAS

Journal keyword(s): galaxies: active - cosmic macrowave background - cosmology: observations - radio continuum: general

VizieR on-line data: <Available at CDS (J/MNRAS/400/984): table2.dat>

Nomenclature: Table 2: NEWPS5 JHHMM+DDMM N=97.

Simbad objects: 102

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2009MNRAS.400..984D and select 'bookmark this link' or equivalent in the popup menu