arXiv subjects

S. W. L. Holzapfel

Publications and source records attributed to S. W. L. Holzapfel.

2 recordsLinked to original sources

arXiv2003

First Results From an X-ray, Weak Lensing, and Sunyaev-Zeldovich Effect Survey of Nearby Clusters: Abell 3266

As part of a combined Sunyaev-Zeldovich Effect (SZE), X-ray and weak lensing survey of low redshift (z<0.1) X-ray clusters, we present SZE images of the z=0.059 X-ray cluster Abell 3266 at three observing frequencies (150, 220, 275 GHz) and after the spectral subtraction of primary Cosmic Microwave Background (CMB) anisotropies. These images were generated using the ACBAR bolometer array operated on the Viper telescope at the South Pole. The multi-frequency data from ACBAR should allow us to overcome one of the main obstacles facing the analysis of SZE observations of nearby clusters, i.e. contamination from primary Cosmic Microwave Background (CMB) anisotropies.

astro-ph↗

arXiv1999

Analyzing data from DASI

We present an optimized layout of horn positions for the Degree Angular Scale Interferometer (DASI), which provides good coverage of the u-v plane and 3-fold symmetry. We investigate how an optimal subspace filtering analysis of a single pointing of DASI could be used to determine the anisotropies in the cosmic microwave background over a range of angular scales near 30'. We discuss the complementarity between the angular scales probed by DASI and NASA's MAP satellite at 30GHz and strategies for imaging the sky at these frequencies. Finally, we quantitatively assess how well the angular power spectrum can be recovered by deconvolution of linear combinations of squares of the DASI visibilities.

astro-ph↗