{"paper":{"title":"Spitzer Observations of OGLE-2015-BLG-1212 Reveal a New Path to Breaking Strong Microlens Degeneracies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"A. Bhattacharya, A. Fukui, A. Gould, A. Popovas, A. Sharan, A. Udalski, A. Yonehara, B.-G. Park, B. S. Gaudi, B. Wibking, C. Beichman, C. B. Henderson, C. Han, C.H. Ling, C. Snodgrass, C.-U. Lee, C. von Essen, D. F. Evans, D.-J. Kim, D.J. Sullivan, D. Maoz, D.M. Bramich, D.P. Bennett, D. Suzuki, E. Kerins, E. Unda-Sanzana, F.Abe, G. Bryden, G. D'Ago, G. Scarpetta, H. Korhonen, H. Oyokawa, H. Park, I.A. Bond, I.-G. Shin, I. Soszy\\'nski, J. C. Yee, J. Skottfelt, J. Skowron, J. Southworth, J. Surdej, J.-Y.Choi, K. Inayama, K. Masuda, K. Ohnishi, K. Ulaczyk, L. Mancini, {\\L}. Wyrzykowski, M.C.A. Li, M. D. Albrow, M. Dominik, M. Donachie, M. Fausnaugh, M. Freeman, M. Friedmann, M. Hundertmark, M.I. Andersen, M.J. Burgdorf, M. K. Szyma\\'nski, M. Kuffmeier, M. Nagakane, M. Pawlak, M. Rabus, N. Kains, N. Koshimoto, N. Rattenbury, O. Wertz, P.J. Tristram, P. Mr\\'oz, P. Pietrukowicz, R. Figuera Jaimes, R.K. Barry, R. Poleski, R.T. Rasmussen, R. W. Pogge, S. Calchi Novati, S. Carey, S. Ciceri, S.-H. Gu, S. Kaspi, S. Koz{\\l}owski, S.-L. Kim, S.-M. Cha, S. Rahvar, T. C. Hinse, T. Nishioka, T. Saito, T. Sumi, U.G. J{\\o}rgensen, V. Bozza, W. Zhu, Y. Asakura, Y.-B. Wang, Y. Hirao, Y. Itow, Y. K. Jung, Y. Lee, Y. Matsubara, Y. Muraki, Y. Shvartzvald, Y. Wakiyama","submitted_at":"2016-01-07T21:08:15Z","abstract_excerpt":"Spitzer microlensing parallax observations of OGLE-2015-BLG-1212 decisively breaks a degeneracy between planetary and binary solutions that is somewhat ambiguous when only ground-based data are considered. Only eight viable models survive out of an initial set of 32 local minima in the parameter space. These models clearly indicate that the lens is a stellar binary system possibly located within the bulge of our Galaxy, ruling out the planetary alternative. We argue that several types of discrete degeneracies can be broken via such space-based parallax observations."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.01699","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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"}