{"paper":{"title":"I. Flux and color variations of the quadruply imaged quasar HE 0435-1223","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. Elyiv, A. Hornstrup, C. C. Th\\\"one, C. Liebig, C. Snodgrass, D. Ricci, F. Finet, F. Grundahl, F. Hessman, F. Zimmer, G. Maier, G. Masi, G. Scarpetta J. Skottfelt, J. Poels, J. Southworth, J. Surdej, J. Teuber, J. Wambsgan{\\ss}, K. Harps{\\o}e, L. Mancini, M. Burgdorf, M. Dominik, M. Glitrup, M. Hundertmark, M. Mathiasen, M. Zub, P. Browne, P. G. Sprimont, S. Calchi Novati, S. Dreizler, S. Rahvar, T. Anguita, T. C. Hinse, U. G. J{\\o}rgensen, V. Bozza","submitted_at":"2011-01-19T11:10:04Z","abstract_excerpt":"aims: We present VRi photometric observations of the quadruply imaged quasar HE 0435-1223, carried out with the Danish 1.54m telescope at the La Silla Observatory. Our aim was to monitor and study the magnitudes and colors of each lensed component as a function of time. methods: We monitored the object during two seasons (2008 and 2009) in the VRi spectral bands, and reduced the data with two independent techniques: difference imaging and PSF (Point Spread Function) fitting.results: Between these two seasons, our results show an evident decrease in flux by ~0.2-0.4 magnitudes of the four lense"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1101.3664","kind":"arxiv","version":3},"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"}