GCN Circular 27104
Subject
GRB 200216B: Nanshan/NEXT early optical upper limit and possible host galaxy
Date
2020-02-16T15:09:41Z (4 years ago)
From
Dong Xu at NAOC/CAS <dxu@nao.cas.cn>
D. Xu, Z.P. Zhu, X. Liu, B.Y. Yu, Y. Ma (NAOC), X. Gao (Urumqi No.1
Senior High School) report:
We observed the field of GRB 200216B (D'Avanzo et al., GCN 27102) using
the NEXT 0.6m optical telescope located at Nanshan, Xinjiang, China.
Observations automatically started at 13:33:46 UT on 2002-02-16, i.e.,
73 s after the BAT trigger. We obtained 3x40 s, 4x60 s, 3x90 s and
onging 200 s frames in the Sloan r-filter. The altitude for the GRB and
the weather has been improving.
No optical afterglow is detected in our images at the XRT position
(D'Avanzo et al., GCN 27102) down to a limiting magnitude of r~20.0.
Meanwhile, we note that there exists a very marginally detected blob
(thus noise fluctuation not ruled out yet), extended and being
positionally consistent with the XRT position both in PanSTAR r-band
field, centred at coordinates: R.A. (J2000) = 10:41:44.23, Dec. (J2000)
= +19:28:33.18. The source would be of r~23 in depth, and might be the
host galaxy of the GRB. Deep imaging would identify the nature of the blob.