TITLE: GCN CIRCULAR NUMBER: 16963 SUBJECT: GRB 141004A: Continued RATIR Late Time Optical and NIR Observations DATE: 14/10/26 19:23:33 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), Jos�� A. de Diego (UNAM), Leonid Georgiev (UNAM), Jes��s Gonz��lez (UNAM), Carlos Rom��n-Z����iga (UNAM), Neil Gehrels (GSFC), and Harvey Moseley (GSFC) report: We again observed the field of GRB 141004A (D'Elia, et al., GCN 16878) with the Reionization and Transients Infrared Camera (RATIR; www.ratir.org) on the 1.5m Harold Johnson Telescope at the Observatorio Astron��mico Nacional on Sierra San Pedro M��rtir from 2014/10 26.26 to 2014/10 26.52 UTC (21.27 to 21.55 days after the BAT trigger), obtaining a total of 4.98 hours exposure in the r, i and z bands. We continue to detect the source reported in previous epochs of RATIR observations (Littlejohns, et al., GCN 16937, Littlejohns, et al., GCN 16887), with the following detections and upper limit: r 23.94 +/- 0.20 i 23.38 +/- 0.15 z > 20.97 These magnitudes are in the AB system and are not corrected for Galactic extinction in the direction of the GRB. These magnitudes are broadly consistent with our previous epoch of observations (Littlejohns, et al., GCN 16937). Further observations are planned. We thank the staff of the Observatorio Astron��mico Nacional in San Pedro M��rtir.