TITLE: GCN CIRCULAR NUMBER: 22390 SUBJECT: GRB 180205A: Nickel telescope optical observations DATE: 18/02/06 00:10:25 GMT FROM: Weikang Zheng at UC Berkeley Edward Falcon, Sameen Yunus, WeiKang Zheng and Alex Filippenko (UC Berkeley) report on behalf of the KAIT GRB team: We observed the field of GRB 180205A (Evans et al., GCN 22381) with the 1-m Nickel telescope located at Lick observatory, California. Observations started about 1.32 hours after the burst and lasted for ~1.4 hours. We detected the optical afterglow (Evans et al. GCN 22381; Zheng et al. GCN 22382; Bolmer et al. GCN 22383; Tanvir et al. GCN 22384; Volnova et al. GCN 22387) in all the images taken with B,V,R and I filters. A preliminary light curve is posted at the following link along with KAIT observations (Zheng et al. GCN 22382): http://astro.berkeley.edu/~zwk/grb/GRB180205A/GRB180205A_nickel_kait.png