GCN Circular 21048
Subject
GRB 170428A: Xinglong 2.16-m upper limit and host galaxy candidate
Date
2017-04-29T00:31:01Z (7 years ago)
From
Dong Xu at NAOC/CAS <dxu@nao.cas.cn>
D. Xu (NAOC), Y. Qin (Geneva Obs.), Y. Zhao, J.J. Jia, H.X. Feng, Z.P.
Zhu (NAOC), Y.D. Hu (IAA-CSIC), S. Feng, M.T. Ju (SHAO) report
We observed the field of short GRB 170428A (Beardmore et al., GCN 21042)
using the 2.16-m telescope located at Xinglong, Hebei, China. We
obtained 6x300s R-band frames, starting at 19:23:21 UT on 2017-04-28
(i.e., 10.16 hr after the burst).
No optical source is detected at the XRT position (Beardmore & Evans,
GCN 21047) in the stacked R-band image, down to a limiting magnitude of
m(R)>21.0.
We note that in the SDSS and Pan-STARRS archival data there already
exists a singe source within the XRT error circle, seemingly extended in
the northeast - southwest direction. It is localised at
R.A (J2000) = 22:00:18.687
Dec. (J2000) = +26:54:56.51
with a brightness of m(r)~22.2 mag, and thus might be the host galaxy of
this short burst.