[vsnet-grb-info 21811] GRB 190219A: NEXT-0.6m optical upper limit

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  23910
SUBJECT: GRB 190219A: NEXT-0.6m optical upper limit
DATE:    19/02/20 07:41:53 GMT
FROM:    Dong Xu at NAOC/CAS  <dxu at nao.cas.cn>

Z.P. Zhu, D. Xu, B.Y. Yu (NAOC), J.H. Liu (XAO) report:

We observed the field of GRB 190219A (Beardmore et al., GCN 23902) using 
the NEXT-0.6m telescope located at Nanshan, Xinjiang, China. We obtained 
10x90s frames in the R filter, started at 19:57:52 UT on 2019-02-19, 
i.e., 18.43 min after the burst.

No optical source is detected at the XRT position (Beardmore et al., GCN 
23902 & 23907) in our stacked image, down to a 3 sigma limiting 
magnitude of R~17.5.