GCN Circular 21795
Subject
GRB 170903A: Nanshan optical upper limit
Event
Date
2017-09-03T15:01:49Z (9 years ago)
From
Dong Xu at NAOC/CAS <dxu@nao.cas.cn>
H.X. Feng, D. Xu, Z.P. Zhu (NAOC), S.G. Ma, T.Z. Yang, J.H. Liu, P.
Zong, H.B. Niu, J.Z. Liu, A. Esamdin, L. Ma (all XAO), Y.D. Hu
(IAA-CSIC), Y. Qing (Geneva Observatory) report:
We observed the field of GRB 170903A (Markwardt et al., GCN 21793) using
the 1m telescope located at Nanshan, Xinjiang, China. We obtained 3x180s
R-band frames, starting at 14:08:09 UT on 2017-09-03, i.e., 1.317 hr
after the burst.
No optical source is detected at the XRT position (Campana et al., GCN
21794) in the stacked image, down to a limiting magnitude of m(R)~21.3,
calibrated with the nearby SDSS field.