TITLE: GCN CIRCULAR NUMBER: 10765 SUBJECT: GRB 100514A: YNAO-GMG observations DATE: 10/05/15 15:04:17 GMT FROM: Jirong Mao at INAF-OAB J. Mao (YNAO & INAF-OAB) and J. Bai (YNAO) report on behalf of the GMG group: Starting from 19h 49m 49s UT, after about 1 hour of the GRB trigger, we observed the field of GRB 100514A (Markwardt et al. GCN 10759) with one 2.4-m telescope located at Gao-Mei-Gu (GMG). We did not find any optical afterglows in a series of R-band images. The magnitude limit(relative to USNO-B1) is about 20.6. This message might be cited.