SPT-SZ MCMF: An extension of the SPT-SZ catalog over the DES region
M. Klein, J. J. Mohr, S. Bocquet, M. Aguena, S. W. Allen, O. Alves, B., Ansarinejad, M. L. N. Ashby, D. Bacon, M. Bayliss, B. A. Benson, L. E. Bleem,, M. Brodwin, D. Brooks, E. Bulbul, D. L. Burke, R. E. A. Canning, J. E., Carlstrom, A. Carnero Rosell, J. Carretero, C. L. Chang

TL;DR
This paper extends the SPT-SZ galaxy cluster catalog to include lower mass and redshift clusters using the MCMF algorithm and DES data, improving catalog completeness and purity for cosmological studies.
Contribution
It introduces an extended SPT-SZ cluster catalog with enhanced depth and purity, utilizing the MCMF algorithm applied to DES data for better cluster identification.
Findings
Catalog contains 811 sources with 91% purity.
Includes 50% more clusters than the original SPT-SZ catalog.
False detection rate aligns with Gaussian noise expectations.
Abstract
We present an extension to a Sunyaev-Zel'dovich Effect (SZE) selected cluster catalog based on observations from the South Pole Telescope (SPT); this catalog extends to lower signal-to-noise than the previous SPT-SZ catalog and therefore includes lower mass clusters. Optically derived redshifts, centers, richnesses and morphological parameters together with catalog contamination and completeness statistics are extracted using the multi-component matched filter algorithm (MCMF) applied to the S/N>4 SPT-SZ candidate list and the Dark Energy Survey (DES) photometric galaxy catalog. The main catalog contains 811 sources above S/N=4, has 91% purity and is 95% complete with respect to the original SZE selection. It contains 50% more total clusters and twice as many clusters above z=0.8 in comparison to the original SPT-SZ sample. The MCMF algorithm allows us to define subsamples of the…
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Taxonomy
TopicsAstronomical Observations and Instrumentation · Astronomy and Astrophysical Research · Geophysics and Gravity Measurements
