GCN Circular 23890
Subject
GRB 190211A: NOT optical observations
Date
2019-02-12T09:23:10Z (5 years ago)
From
Dong Xu at NAOC/CAS <dxu@nao.cas.cn>
K.E. Heintz (Univ. of Iceland), D. Xu (NAOC), D.B. Malesani (DAWN/NBI
and DARK/NBI), S. Moran (NOT), report on behalf of a larger collaboration:
We observed the field of GRB 190211A (Marshall et al., GCN 23883) using
the 2.56-m Nordic Optical Telescope (NOT) equipped with the ALFOSC
camera. We obtained 3x200 s SDSS r-band and 3x300 s SDSS z-band frames,
starting at 02:23:58 UT on 2019-02-12, i.e., 9.487 hr after the BAT trigger.
The previously reported optical afterglow (e.g., Xu et al., GCN 23884;
Hu et al., GCN 23886) is clearly detected in our stacked images. The
afterglow faded to m(r)=22.7 �� 0.1 mag at 9.578 hr post-burst and m(z) =
22.0 �� 0.2 mag at 9.815 hr post-burst, calibrated with nearby SDSS stars.