[vsnet-grb-info 24092] GRB 191106A: NOT optical upper limit
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Thu Nov 7 10:09:59 JST 2019
TITLE: GCN CIRCULAR
NUMBER: 26191
SUBJECT: GRB 191106A: NOT optical upper limit
DATE: 19/11/07 01:08:39 GMT
FROM: Dong Xu at NAOC/CAS <dxu at nao.cas.cn>
Z.P. Zhu, D. Xu (NAOC), J. Viuho (NOT) report on behalf of a larger
collaboration:
We observed the field of GRB 191106A (Marshall et al., GCN 26177) using
the Nordic Optical Telescope (NOT) equipped with the ALFOSC camera.
Observations started at 19:35:51 UT on 2019-11-06 (i.e., 3.35 hr after
the BAT trigger), and 16x200s Sloan z-band frames were obtained.
No optical source is detected in our stacked image at the XRT position
(Page et al., GCN 26190), down to a limiting magnitude of z > 22.0 at a
mean time of 4.0 hr post-burst, calibrated with the nearby SDSS field.
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