The SPT-Deep Cluster Catalog: Sunyaev-Zel'dovich Selected Clusters from Combined SPT-3G and SPTpol Measurements over 100 Square Degrees

@article{kornoelje2026sptdeep,
  title = {{The SPT-Deep Cluster Catalog: Sunyaev-Zel'dovich Selected Clusters from Combined SPT-3G and SPTpol Measurements over 100 Square Degrees}},
  author = {K. Kornoelje and Lindsey E. Bleem and Eli S Rykoff and T. M. C. Abbott and Peter A. R. Ade and M. Aguena and O. Alves and Adam J. Anderson and F. Andrade-Oliveira and Behzad Ansarinejad and M. Archipley and Matt L. N. Ashby and Jason E. Austermann and D. Bacon and L. Balkenhol and Matthew B. Bayliss and James A. Beall and K. Benabed and A. N. Bender and Bradford A. Benson and F. Bianchini and S. Bocquet and François R. Bouchet and D. Brooks and D. L. Burke and Michael S. Calzadilla and M. G. Campitiello and E. Camphuis and J. E. Carlstrom and Aurelio Carnero Rosell and J. Carretero and C. L. Chang and P. Chaubal and Hsin Cynthia Chiang and P. M. Chichura and A Chokshi and T.-L. Chou and R. Citron and A. Coerver and C. Corbett Moran and M. Costanzi and T. M. Crawford and Abigail T. Crites and L. N. da Costa and C. Daley and T. de Haan and J. De Vicente and S. Desai and K. R. Dibert and M. Dobbs and P. Doel and M. Doohan and A. Doussot and D. Dutcher and Wendeline B. Everett and S. Everett and Chang Qing Feng and K. R. Ferguson and Juan Mena-Fernández and I. Ferrero},
  journal = {The Astrophysical Journal},
  year = {2026},
  month = jun,
  doi = {10.3847/1538-4357/ae5f7b},
  eprint = {2503.17271},
  archivePrefix = {arXiv},
  url = {https://hal.science/hal-05015356v1},
  note = {CC BY 4.0},
}

TY  - JOUR
TI  - The SPT-Deep Cluster Catalog: Sunyaev-Zel'dovich Selected Clusters from Combined SPT-3G and SPTpol Measurements over 100 Square Degrees
AU  - K. Kornoelje
AU  - Lindsey E. Bleem
AU  - Eli S Rykoff
AU  - T. M. C. Abbott
AU  - Peter A. R. Ade
AU  - M. Aguena
AU  - O. Alves
AU  - Adam J. Anderson
AU  - F. Andrade-Oliveira
AU  - Behzad Ansarinejad
AU  - M. Archipley
AU  - Matt L. N. Ashby
AU  - Jason E. Austermann
AU  - D. Bacon
AU  - L. Balkenhol
AU  - Matthew B. Bayliss
AU  - James A. Beall
AU  - K. Benabed
AU  - A. N. Bender
AU  - Bradford A. Benson
AU  - F. Bianchini
AU  - S. Bocquet
AU  - François R. Bouchet
AU  - D. Brooks
AU  - D. L. Burke
AU  - Michael S. Calzadilla
AU  - M. G. Campitiello
AU  - E. Camphuis
AU  - J. E. Carlstrom
AU  - Aurelio Carnero Rosell
AU  - J. Carretero
AU  - C. L. Chang
AU  - P. Chaubal
AU  - Hsin Cynthia Chiang
AU  - P. M. Chichura
AU  - A Chokshi
AU  - T.-L. Chou
AU  - R. Citron
AU  - A. Coerver
AU  - C. Corbett Moran
AU  - M. Costanzi
AU  - T. M. Crawford
AU  - Abigail T. Crites
AU  - L. N. da Costa
AU  - C. Daley
AU  - T. de Haan
AU  - J. De Vicente
AU  - S. Desai
AU  - K. R. Dibert
AU  - M. Dobbs
AU  - P. Doel
AU  - M. Doohan
AU  - A. Doussot
AU  - D. Dutcher
AU  - Wendeline B. Everett
AU  - S. Everett
AU  - Chang Qing Feng
AU  - K. R. Ferguson
AU  - Juan Mena-Fernández
AU  - I. Ferrero
PY  - 2026
DA  - 2026/06/04
JO  - The Astrophysical Journal
DO  - 10.3847/1538-4357/ae5f7b
UR  - https://hal.science/hal-05015356v1
AB  - 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 μK-arcmin at 95, 150, and 220 GHz, respectively. This is comparable to noise levels expected for the wide field survey of CMB-S4, a next-generation CMB experiment. 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_500c < 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 17.4^+3.1_−2.9 % (3.7^+0.7_−0.7%) 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, demonstrating 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.
SN  - 0004-637X
SN  - 1538-4357
ER  -