TITLE:   GCN CIRCULAR
NUMBER:  23916
SUBJECT: GRB 190220B: BOOTES-4 optical observation
DATE:    19/02/20 23:05:52 GMT
FROM:    Alberto Castro-Tirado at Inst.de Astro. de Andalucia  <ajct@iaa.es>

Y.-D. Hu, X.-Y.Li, E. Fernandez-Garcia, A. Ayala, A. J. Castro-Tirado 
(IAA-CSIC), C. Perez del Pulgar, A. Castellon, I. Carrasco (Univ. de 
Malaga),  S. Guziy (Univ. of Nikolaev) and D. Xiong, Y. Fan, X. Zhao, J. 
Bai, C. Wang, Y. Xin (Yunnan Nacional Astronomical Observatory) on 
behalf of a larger collaboration, report:

"Following the detection of GRB 190220B by INTEGRAL (Gotz et al. GCNC 
23915), the 0.6m BOOTES-4/MET robotic telescope at Lijiang Astronomical 
Observatory (China) responded to the the burst gathering images starting 
at 20:17:12 UT (89 s after trigger, 84 s after notice). No optical 
afterglow candidate is found down to 18 mag (g'-band) in the co-added 
(5x10s) image within the reported INTEGRAL 2 arcmin radius error box. 
Observations are ongoing."