TITLE: GCN CIRCULAR NUMBER: 14179 SUBJECT: GRB 130131B: RATIR Upper Limits DATE: 13/02/02 14:51:20 GMT FROM: Nat Butler at Az State U 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 (UCSC), Eleonora Troja (GSFC), Enrico Ramirezā€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 130131B (Siegel et al., GCN 14159) 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. Between 2013 February 1.42 and 2013 February 1.54 UTC (14.86 to 17.70 hrs after the BAT trigger), we obtained 1.96 hrs exposure in the r and i bands and 0.73 hrs exposure in the Z, Y, J, and H bands. We detect no source within the XRT error circle (Goad et al., GCN 14165). In comparison with SDSS DR8 and 2MASS, we derive the following upper limits (3-sigma) in the AB magnitude system: r' > 23.8 i' > 23.1 Z > 22.1 Y > 21.7 J > 21.8 H > 21.4 These magnitudes 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.