{"paper":{"title":"Search for RR Lyrae stars in DES ultra-faint systems: Grus I, Kim 2, Phoenix II, and Grus II","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"A. A. Plazas, A. B. Pace, A. Carnero Rosell, A. Drlica-Wagner, A. G. Kim, A. H. Riley, A. K. Vivas, A. R. Walker, B. Santiago, C. E. Mart\\'inez-V\\'azquez, C. J. Miller, D. Brooks, D. Gruen, D. J. James, D. L. Burke, D. L. Hollowood, E. Bertin, E. Buckley-Geer, E. Gaztanaga, E. O. Nadler, E. Sanchez, F. Menanteau, F. Paz-Chinch\\'on, F. Sobreira, G. Gutierrez, G. Tarle, H. T. Diehl, I. Sevilla-Noarbe, J. Annis, J. De Vicente, J. D. Simon, J. Frieman, J. Garc\\'ia-Bellido, J. Gschwend, J. L. Marshall, K. Bechtol, K. Honscheid, K. Kuehn, K. M. Stringer, L. Macri, L. N. da Costa, M. A. G. Maia, M. Carrasco Kind, M. E. C. Swanson, M. Foucoin, M. McCarthy, M. Smith, M. Soares-Santos, N. Kuropatkin, P. Doel, R. A. Gruendl, R. Hounsell, R. Miquel, S. Avila, S. Desai, S. Everett, S. Serrano, T. S. Li, V. Scarpine, V. Vikram (DES Collaboration)","submitted_at":"2019-09-13T15:59:09Z","abstract_excerpt":"This work presents the first search for RR Lyrae stars (RRLs) in four of the ultra-faint systems imaged by the Dark Energy Survey (DES) using SOAR/Goodman and Blanco/DECam imagers. We have detected two RRLs in the field of Grus I, none in Kim 2, one in Phoenix II, and four in Grus II. With the detection of these stars, we accurately determine the distance moduli for these ultra-faint dwarf satellite galaxies; $\\mu_0$=20.51$\\pm$0.10 mag (D$_{\\odot}$=127$\\pm$6 kpc) for Grus I and $\\mu_0$=20.01$\\pm$0.10 mag (D$_{\\odot}$=100$\\pm$5 kpc) for Phoenix II. These measurements are larger than previous es"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1909.06308","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1909.06308/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}