TITLE: GCN CIRCULAR NUMBER: 17018 SUBJECT: GRB 141031B: RATIR Optical and NIR Observation DATE: 14/11/01 16:05:34 GMT FROM: Nat Butler at UC berkeley Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC), William H. Lee (UNAM), Michael G. Richer (UNAM), Chris Klein (UCB), Ori Fox (UCB), J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (ORAU/GSFC), Eleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz (UCSC), José A. de Diego (UNAM), Leonid Georgiev (UNAM), Jesús González (UNAM), Carlos Román-Zúñiga (UNAM), Neil Gehrels (GSFC), and Harvey Moseley (GSFC) report: We observed the field of GRB 141031B (Gompertz, et al., GCN 16998) with the Reionization and Transients Infrared Camera (RATIR; www.ratir.org) on the 1.5m Harold Johnson Telescope at the Observatorio Astronómico Nacional on Sierra San Pedro Mártir from 2014/11 1.10 to 2014/11 1.11 UTC (11.34 to 11.75 hours after the BAT trigger), obtaining a total of 0.36 hours exposure in the r, i, and z bands. For a source within the enhanced Swift-XRT error circle (Goad, et al., GCN 17009), in comparison with the SDSS DR9, we obtain the following upper limits (3-sigma): r > 22.98 i > 22.81 z > 19.91 These magnitudes are in the AB system and are not corrected for Galactic extinction in the direction of the GRB. We thank the staff of the Observatorio Astronómico Nacional in San Pedro Mártir.