GCN Circular 23788
Subject
GRB 190123A: NEXT-0.6m optical limit
Date
2019-01-24T17:11:59Z (5 years ago)
From
Dong Xu at NAOC/CAS <dxu@nao.cas.cn>
D. Xu, Z.P. Zhu (NAOC) report on behalf of a larger collaboration
We observed the field of GRB 190123A (D'Ai et al., GCN Circ. 23769) with
the robotic NEXT-0.6m telescope located at Nanshan, Xinjiang, China. We
obtained 3x40s, 4x60s, 3x90s R-band frames, starting at 12:20:56 UT on
2019-01-23, i.e., 103 sec after the BAT trigger.
No optical afterglow consistent with the XRT position (Beardmore et al.
GCN Circ. 23771) is detected in the stacked image, download a limiting
magnitude of R~19.5, calibrated with the USNO-B1 catalog.