TITLE:   GCN CIRCULAR
NUMBER:  24907
SUBJECT: GRB 190627A : Xinglong 2.16m optical observation
DATE:    19/06/29 16:06:41 GMT
FROM:    Liping Xin at NAOC, SVOM  <xlp@nao.cas.cn>

L. P. Xin,  J. J. Ren, X. H, Han, G. W. Li,  R. S. Zhang,   J. Wang,  
J. Y. Wei,   Y. G. Yang, E. W. Liang,  X. G. Wang,   H. L. Li, 
X. M. Lu,  L. Huang,    H. B. Cai,   Y. L. Qiu,  Y. Xu, 
Y.  J. Xiao,  Y. T. Zheng,  C. Wu,   J. S. Deng,   D. W. Xu,  
D. Turpin,  W. L. Dong, P. P. Zhang report:

We observed  GRB 190627A  (Sonbas et al., GCN 24888 ) using the  
Xinglong-2.16m equipped with  the BFOSC camera. Observations 
were carried out from 13:46:06 to 14:06:29 UT on 2019-06-29,  
5*300sec R band images were obtained.

The optical afterglow (Siegel & Sonbas, GCN 24889, 
Lipunov et al., GCN Circ 24895; Morris et al., GCN Circ 24894; 
Leonini et al., GCN Circ 24893; Pozaneko et al., GCN Circ 24892; 
Pozanenko et al. GCN Circ 24900;  Kann et al., GCN Circ 24901; 
Blazek et al., GCN Circ 24902;  Jelinek & Strobl GCN Circ 24903; 
Malesani et al. GCN Circ 24904,  Mao et al., GCN Circ 24896,  24905) 
was marginal detected in our stacked image with a magnitude of 
R=20.5+/-0.2 mag at the mid time of about 2.1 days after the burst. 
The photometry is calibrated with nearby USNO B1.0 stars