TITLE: GCN CIRCULAR NUMBER: 17636 SUBJECT: GRB 150323C: RATIR Optical Afterglow Observations - Errata DATE: 15/03/24 17:19:02 GMT FROM: Alan M. Watson at Instituto de Astronomia UNAM Alan M. Watson (UNAM), Owen Littlejohns (ASU), Nat Butler (ASU), 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-Zúńiga (UNAM), Neil Gehrels (GSFC), and Harvey Moseley (GSFC) report: In Watson et al. (GCN Circular 17632), we compared our RATIR observations of GRB 150323C to earlier observations to derive an approximate temporal power-law index of 0.5. We unfortunately gave an incorrect reference to the earlier observations; the correct reference is Xu et al. (GCN Circular 17625). We apologise for any confusion.