K. Kornoelje, L. E. Bleem, E. S. Rykoff, T. M. C. Abbott, P. A. R. Ade, M Aguena, O. Alves, A.J Anderson, F. Andrade-Oliveira, Behzad Ansarinejad, M. Archipley, M. L. N. Ashby, Jason E. Austermann, D. Bacon, L. Balkenhol, Matthew B. Bayliss, James A. Beall, K. Benabed, A. N. Bender, B. A. Benson, F. Bianchini, S. Bocquet, F. R. Bouchet, D. Brooks, D. L. Burke, Michael S. Calzadilla, M. G. Campitiello, E. Camphuis, J. E. Carlstrom, A. Carnero Rosell, J. Carretero, C. L. Chang, P. Chaubal, H. C. Chiang, P. M. Chichura, A Chokshi, T.-L. Chou, R. Citron, A. Coerver, C. Corbett Moran, M. Costanzi, T. M. Crawford, A. T. Crites, L. N. da Costa, Claude Daley, T. de Haan, J. De Vicente, S. Desai, K. R. Dibert, M. Dobbs, P. Doel, M. Doohan, Alexandre Doussot, D. Dutcher, W. Everett, S. Everett, Chang Feng, K. R. Ferguson, J. Mena-Fernández, I. Ferrero, K Fichman, B Flaugher, B. Floyd, A. Foster, D. N. Friedel, J. Frieman, S. Galli, J. Gallicchio, A.E Gambrel, J. García-Bellido, R. W. Gardner, R. Gassis, Marco Gatti, Fan Ge, E. M. George, G. Giannini, N. Goeckner-Wald, S. Grandis, D Gruen, R.A Gruendl, R. Gualtieri, F. Guidi, S Guns, N. Gupta, G. Gutierrez, N. W. Halverson, S. R. Hinton, E. Hivon, G. P. Holder, D.L Hollowood, W. L. Holzapfel, K. Honscheid, J. C. Hood, J. D. Hrubes, A Hryciuk, N. Huang, Johannes Hubmayr, K. D. Irwin, D.J James, F. Kéruzoré
Abstract We present a catalog of 500 galaxy cluster candidates in the SPT-Deep field: a 100 deg 2 field that combines data from the SPT-3G and SPTpol surveys to reach noise levels of 3.0, 2.2, and 9.0 μ K-arcmin at 95, 150, and 220 GHz, respectively. Candidates are selected via the thermal Sunyaev–Zel’dovich (SZ) effect with a minimum significance of ξ = 4.0, resulting in a catalog of purity ∼89%. Optical data from the Dark Energy Survey and infrared data from the Spitzer Space Telescope are used to confirm 442 cluster candidates. The clusters span 0.12 < z ≲ 1.8 and 1.0 × 10 14 M ⊙ / h 70 < M 500 c < 8.7 × 10 14 M ⊙ / h 70 . The sample’s median redshift is 0.74, and the median mass is 1.7 × 10 14 M ⊙ / h 70 ; these are the lowest median mass and highest median redshift of any SZ-selected sample to date. We assess the effect of infrared emission from cluster member galaxies on cluster selection by performing a joint fit to the infrared dust and tSZ signals by combining measurements from SPT and overlapping submillimeter data from Herschel/SPIRE. We find that at high redshift ( z > 1), the tSZ signal is reduced by 17 . 9 − 3.2 + 3.8 % ( 3 . 8 − 0.7 + 0.9 % ) at 150 GHz (95 GHz) due to dust contamination. We repeat our cluster finding method on dust-nulled SPT maps and find the resulting catalog is consistent with the nominal SPT-Deep catalog, suggesting dust contamination does not significantly impact the SPT-Deep selection function; we attribute this lack of bias to the inclusion of the SPT 220 GHz band.