Archipley, M.Hryciuk, A.Bleem, L.E.Kornoelje, K.Klein, M.Anderson, A. J.;Ansarinejad, B.Aravena, M.Balkenhol, L.Barry, P.S.Benabed, K.Bender, A.N.Benson, B.A.Bianchini, F.Bocquet, S.Bouchet, F.R.Camphuis, E.Campitiello, M.G.Carlstrom, J.E.Cathey, J.Chang, C.L.Chapman, S.C.Chaubal, P.Chichura, P.M.Chokshi, A.Chou, T. -l.Coerver, A.Crawford, T.M.Daley, C.De Haan, T.Deane, RogerDibert, K.R.Dobbs, M.A.Doohan, M.Doussot, A.Dutcher, D.Everett, W.Feng, C.Ferguson, K.R.Fichman, K.Floyd, B.Foster, A.Galli, S.Gambrel, A.E.Gardner, R.W.Ge, F.Goeckner-Wald, N.Gonzalez, A.Grandis, S.Greve, T.R.Gualtieri, R.Guidi, F.Guns, S.Halverson, N.W.Hill, R.Hivon, E.Holder, G.P.Holzapfel, W.L.Hood, J.C.Huang, N.Keruzore, F.Khalife, A.R.Knox, L.Korman, M.Kuo, C.-l.Levy, K.Lowitz, A.E.Lu, C.Lynch, G.P.Maniyar, A.Martsen, E.S.Menanteau, F.Millea, M.Montgomery, J.Nakato, Y.Natoli, T.Noble, G.I.Omori, Y.Ouellette, A.Pan, Z.Phadke, K.A.Pollak, A.W.Prabhu, K.Quan, W.Raghunathan, S.Rahimi, M.Rahlin, A.Reichardt, C.L.Reuter, C.Rouble, M.Ruhl, J.E.Schiappucci, E.Simpson, A.Sobrin, J.A.Stalder, B.Stark, A.A.Sulzenauer, N.Tandoi, C.Thorne, B.Trendafilova, C.Umilta, C.Vieira, J.D.Vitrier, A.Vizgan, D.Wan, Y.Weiss, A.Whitehorn, N.Wu, W.L.K.Young, M.R.Zebrowski, J.A.Zhou, D.2026-04-022026-04-022026-02Archipley, M., Hryciuk, A., Bleem, L.E.et al. 2026, 'Millimeter-wave observations of Euclid Deep Field South using the South Pole Telescope : a data release of temperature maps and catalogs', Astronomy and Astrophysics, vol. 706, art. A17, pp. 1-25, doi : 10.1051/0004-6361/202555798.0004-6361 (print)1432-0746 (online)10.1051/0004-6361/202555798http://hdl.handle.net/2263/109433DATA AVAILABILITY : Data products described in Sect. 5, including catalogs, sky maps, and ancillary products, are available for download at https://pole.uchicago.edu/public/data/edfs25/, the NASA LAMBDA archive at https://lambda.gsfc.nasa. gov/product/spt/spt3g_euclid_deep_field_south_info.html, and at the CDS via https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/706/A17.CONTEXT : The South Pole Telescope third-generation camera (SPT-3G) has observed over 10 000 square degrees of sky at 95, 150, and 220 GHz (3.3, 2.0, 1.4 mm, respectively) and will significantly overlap the ongoing 14 000 square-degree Euclid Wide Survey. The Euclid collaboration recently released Euclid Deep Field South (EDF-S) observations of 23 square degrees at wide field depths in the first quick data release (Q1). AIMS : With the goal of releasing complementary millimeter-wave data and encouraging legacy science, we performed dedicated observations of a 57-square-degree field overlapping the EDF-S. METHODS : The observing time totaled 20 days, and we reached noise depths of 4.3, 3.8, and 13.2 μK-arcmin at 95, 150, and 220 GHz, respectively. RESULTS : In this work we present the temperature maps and two catalogs constructed from these data. The emissive source catalog contains 601 objects (334 inside EDF-S) with 54% synchrotron-dominated sources and 46% thermal dust emission-dominated sources. The 5σ detection thresholds are 1.7, 2.0, and 6.5 mJy in the three bands. The cluster catalog contains 217 cluster candidates (121 inside EDF-S) with median mass M500c = 2.12 × 1014 M⊙/h70 and median redshift z = 0.70, corresponding to an order-of-magnitude improvement in cluster density over previous tSZ-selected catalogs in this region (3.81 clusters per square degree). CONCLUSIONS : The overlap between SPT and Euclid data will enable a range of multiwavelength studies of the aforementioned source populations. This work serves as the first step toward joint projects between SPT and Euclid and provides a rich dataset containing information on galaxies, clusters, and their environments.en© The Authors 2026. Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0).CatalogsSurveysGalaxies: clusters: generalGalaxies: high-redshiftCosmology: observationsSubmillimeter: galaxiesArticle