TITLE:   GCN CIRCULAR
NUMBER:  19086
SUBJECT: GRB 160225A: Xinglong TNT optical observation
DATE:    16/02/26 03:35:09 GMT
FROM:    L.P. Xin at NAOC  <xlp@bao.ac.cn>

L. P. Xin, X. F. Wang, J. Y. Wei, X. H. Han, Y. L. Qiu,
J. Wang, C. Wu, J. S. Deng report:

We  observed  GRB 160225A (Siegel et al. GCN 19075)  with
80cm TNT telescope, located at Xinglong obervatory, China,
at 14:24:26 UT,  about 3.5 min after the burst.
The optical afterglow (Wiersema et al., GCN 19082) near the 
enhanced XRT errorbox (Goad et al., GCN 19082) was  detected 
in our white and R-band  images.  

The brightness of the optical afterglow  is about 17.58 mag 
at the mid time  of 3.67 min afer the burst,  calibrated by 
the USNO B1.0 star (RA=10:56:59.4  DEC=+53:40:45  R2=15.26mag).
 
We thank  excellent support of the Xinglong 80cm TNT staff, 
particularly YunPeng Wang.

The message may be cited.