TITLE: GCN CIRCULAR NUMBER: 16980 SUBJECT: GRB 141028A: RATIR Optical and NIR Observations DATE: 14/10/29 04:12:02 GMT FROM: Eleonora Troja at GSFC Eleonora Troja (GSFC), Antonino Cucchiara (ORAU/GSFC), 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), 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 the Fermi/LAT GRB 141028A (Bissaldi et al., GCN 16969, Roberts et al. GCN 16971) 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 2014/10 29.08 to 2014/10 29.13 UTC (from 13.62 to 14.82 hours after the Fermi-GBM trigger), obtaining a total of 1.07 hours exposure in the r, i and z bands. At the position of the XRT and optical counterparts (Kennea et al., GCN 16978, Gorbovskoy et al. GCN 16972, Graham et al. GCN 16977), in comparison with the SDSS DR9, we obtain the following detections: r 20.09 +/- 0.02 i 19.85 +/- 0.02 z 19.50 +/- 0.10 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. [GCN OPS NOTE(29oct14)" Per author's request, the Subject-line was corrected from "29A" to "28A".]