TITLE:   GCN CIRCULAR
NUMBER:  28324
SUBJECT: GRB 200829A: Nanshan/NEXT optical observations
DATE:    20/08/30 15:27:43 GMT
FROM:    Dong Xu at NAOC/CAS  <dxu@nao.cas.cn>

Z.P. Zhu, S.Y Fu, X. Liu, D. Xu (NAOC), X. Gao (Urumqi No.1 Senior High 
School), X. Zhang,  J.Z. Liu (XAO) report:

We observed the field of GRB 200829A (Siegel et al., GCN 28307) using 
the NEXT-0.6m
telescope located at Nanshan, Xinjiang, China. We obtained a series of 
frames in the Sloan g-/r-/i- bands, starting at 19:55:23 UT on 
2020-08-29, i.e., 5.93 hr after the BAT trigger.

The GRB optical afterglow (e.g., Pozanenko et al., GCN 28308; Kuin et 
al., GCN 28311; Ursi et al., GCN 28314; Lipunov et al., GCN 28315; Vinko 
et al., GCN 28316; Hentunen & Nissinen, GCN 28318; Moskvitin et al., GCN 
28322) is clearly detected in our images.

Preliminary photometric measurements are as follows:
Filter	      T-mid(hr)  Mag    Mag_err
SDSS-g	6.72	    18.89	0.04
SDSS-r	5.98	    18.77	0.04
SDSS-i	6.40	    18.50	0.05

calibrated with nearby Pan-STARRS stars.