TITLE: GCN CIRCULAR NUMBER: 15462 SUBJECT: GRB 131030A: Continued RATIR Optical and NIR Observations DATE: 13/11/06 19:36:04 GMT FROM: Owen Littlejohns at Az State U Owen Littlejohns (ASU), 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), 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 again observed the field of GRB 131030A (Troja, et al., GCN Circ. 15402) 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 2013/11 5.08 to 2013/11 5.34 UTC (124.95 to 131.33 hours after the BAT trigger), obtaining a total of 4.24 hours exposure in the r and i bands and 0.92 hours exposure in the Z, Y, J, and H bands. We continue to detect the previously reported source in the r and i bands (Littlejohns, et al., GCN Circ. 15420; Troja, et al., GCN Circ. 15402). For a source within the Swift-XRT error circle, in comparison with the SDSS DR9 and 2MASS, we obtain the following detections and upper limits (3-sigma): r 23.17 +/- 0.14 i 22.73 +/- 0.14 Z > 22.82 Y > 22.35 J > 20.05 H > 19.38 A further epoch of observations was also conducted from 2013/11 6.09 to 2013/11 6.34 UTC (149.15 to 155.17 hours after the BAT trigger), obtaining a total of 3.73 hours exposure in the r and i bands and 1.53 hours exposure in the Z, Y, J, and H bands. The source was detected in the r and i bands once more. For a source within the Swift-XRT error circle, in comparison with the SDSS DR9 and 2MASS, we obtain the following detections and upper limits (3-sigma): r 23.41 +/- 0.18 i 23.06 +/- 0.18 Z > 22.74 Y > 22.25 J > 21.97 H > 21.39 These magnitudes are in the AB system and are not corrected for Galactic extinction in the direction of the GRB. In comparison with previous epochs of RATIR observations, the source continues to fade in both the r and i band. We thank the staff of the Observatorio Astronómico Nacional in San Pedro Mártir.