TITLE: GCN CIRCULAR NUMBER: 13253 SUBJECT: GRB 120422A: Xinglong TNT optical upper limit DATE: 12/04/23 02:38:19 GMT FROM: L.P. Xin at NAOC L. P. Xin, J. Y. Wei, Y. L. Qiu, J. Wang, J. S. Deng, C. Wu, X. H. Han on behalf of EAFON report: We began to observe GRB 120422A (Troja et al., GCN 13243) with Xinglong TNT telescope in R-band at 11:37:41(UT), 4.45 hours after the burst under the bad weather condition. The optical counterpart ( Cucchiara et al. GCN 13245; Kuin et al. GCN 13248; Klotz et al. GCN 13250; Schulze et al. GCN 13252) was not detected in our combined image. The upper limit was estimated about 19.5 mag in R band at the mean time of 5.15 hours after the burst, calibrated against the USNO B1.0 R2mag. This message may be cited. For more information about Xinglong GRBs Follow-up observations, please visit the website: http://www.xinglong-naoc.org:8080/grb/index.html We thank Liang Ma for performing these observations.