{"paper":{"title":"The Relative Lens-Source Proper Motion in MACHO 98-SMC-1","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. Gould, A. Williams, B.S. Gaudi, D.L. Depoy, J.A.R. Caldwell, J. Greenhill, J. Menzies, J.-P. Beaulieu2, K.C. Sahu, K. Hill, K.R. Pollard, M. Dominik, P.D. Sackett, P. Vermaak, R. Martin, R.M. Naber, R. Watson, R.W. Pogge, S. Kane, The PLANET Collaboration: M. D. Albrow","submitted_at":"1998-07-09T17:39:25Z","abstract_excerpt":"We present photometric and spectroscopic data for the second microlensing event seen toward the Small Magellanic Cloud (SMC), MACHO-98-SMC-1. The lens is a binary. We resolve the caustic crossing and find that the source took 2 Delta t = 8.5 hours to transit the caustic. We measure the source temperature T_eff=8000 K both spectroscopically and from the color (V-I)_0~0.22. We find two acceptable binary-lens models. In the first, the source crosses the caustic at phi=43.2 deg and the unmagnified source magnitude is I_s=22.15. The angle implies that the lens crosses the source radius in time t_* "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9807086","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"}