{"paper":{"title":"Observations of the first electromagnetic counterpart to a gravitational wave source by the TOROS collaboration","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.HE","authors_text":"A. Kanaan, A. Molino, A. Ram\\'irez Rivera, A. Zadro\\.zny, B. S\\'anchez, C. Colazo, C. Girardini, C. Mendes de Oliveira, C. Qui\\~nones, D. Dultzin, D. Fern\\'andez, D. Garcia Lambas, D.L. Depoy, D.R. Gon\\c{c}alves, E. R\\'ios-L\\'opez, H. Cuevas Larenas, H. Rodriguez, J. Cabral, J. Garc\\'ia, J.L. Marshall, J.L. Nilo Castell\\'on, J.S. Alcaniz, L.M. Macri, L.R. Abramo, L. Riguccini, L. Sampedro, L. Sodr\\'e, M. Beroiz, M. Castillo, M.C. D\\'iaz, M. Dom\\'inguez Romero, M. Lares, M. Schneiter, M. Starck, M. Tornatore, M.V. Costa-Duarte, N. Padilla, O. L\\'opez-Cruz, P. Coelho, R. Artola, R. Camuccio, R. Lopes de Oliveira, R. Melia, S. Akras, S. Bonoli, S. Gurovich, S. Torres-Flores, T. Pe\\~nuela, T. Ribeiro, T.S. Gon\\c{c}alves, V. Chavushyan, V.M. Placco, V. Renzi, W. Schoenell, Y. Jim\\'enez-Teja","submitted_at":"2017-10-16T16:57:51Z","abstract_excerpt":"We present the results of prompt optical follow-up of the electromagnetic counterpart of the gravitational-wave event GW170817 by the Transient Optical Robotic Observatory of the South Collaboration (TOROS). We detected highly significant dimming in the light curves of the counterpart (Delta g=0.17+-0.03 mag, Delta r=0.14+-0.02 mag, Delta i=0.10 +- 0.03 mag) over the course of only 80 minutes of observations obtained ~35 hr after the trigger with the T80-South telescope. A second epoch of observations, obtained ~59 hr after the event with the EABA 1.5m telescope, confirms the fast fading natur"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1710.05844","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":""},"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"}