The SPTpol Extended Cluster Survey
L. E. Bleem, S. Bocquet, B. Stalder, M. D. Gladders, P. A. R. Ade, S., W. Allen, A. J. Anderson, J. Annis, M. L. N. Ashby, J. E. Austermann, S., Avila, J. S. Avva, M. Bayliss, J. A. Beall, K. Bechtol, A. N. Bender, B. A., Benson, E. Bertin, F. Bianchini, C. Blake, M. Brodwin

TL;DR
The SPTpol Extended Cluster Survey cataloged galaxy clusters via the Sunyaev-Zel'dovich effect, confirmed them with follow-up data, and analyzed their properties, providing valuable data for studying cluster evolution and cosmology.
Contribution
This work presents the first extensive galaxy cluster catalog from the SPTpol survey, including confirmation, contamination analysis, and the optical richness-to-mass relation, enhancing previous SZ cluster studies.
Findings
Confirmed 448 galaxy clusters with high significance
Median cluster mass of approximately 4.4 x 10^{14} solar masses
Optical richness-to-mass relation shallower than weak-lensing estimates
Abstract
We describe the observations and resultant galaxy cluster catalog from the 2770 deg SPTpol Extended Cluster Survey (SPT-ECS). Clusters are identified via the Sunyaev-Zel'dovich (SZ) effect, and confirmed with a combination of archival and targeted follow-up data, making particular use of data from the Dark Energy Survey (DES). With incomplete followup we have confirmed as clusters 244 of 266 candidates at a detection significance and an additional 204 systems at . The confirmed sample has a median mass of , a median redshift of , and we have identified 44 strong gravitational lenses in the sample thus far. Radio data are used to characterize contamination to the SZ signal; the median contamination for confirmed clusters is predicted to be 1% of the SZ signal at the threshold, and…
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