Background sky obscuration by cluster galaxies as a source of systematic error for weak lensing

Lensing magnification and stacked shear measurements of galaxy clusters rely on measuring the density of background galaxies behind the clusters. The most common ways of measuring this quantity ignore the fact that some fraction of the sky is obscured by the cluster galaxies themselves, reducing the...

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Veröffentlicht in:	Monthly notices of the Royal Astronomical Society 2015-05, Vol.449 (2), p.1259-1269
Hauptverfasser:	Simet, Melanie, Mandelbaum, Rachel
Format:	Artikel
Sprache:	eng
Schlagworte:	Astronomy Clusters Density Error analysis Errors Galaxies Optics Sky Sky surveys (astronomy) Stars & galaxies Statistics Symbols Systematic errors
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