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."