[vsnet-grb-info 24467] GRB 191221B: iTelescope T17 detection

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  26566
SUBJECT: GRB 191221B: iTelescope T17 detection
DATE:    19/12/23 02:27:04 GMT
FROM:    Albert Kong at NTHU  <akhkong at gmail.com>

A.K.H. Kong (NTHU, Taiwan) reports

We observed the field of GRB 191221B (Laha et al., GCN 26534) with the
T17 0.43m telescope of iTelescope.Net in Siding Spring, Australia. The
observation was done with a SDSS r filter beginning at 2019-12-22
14:56:51 UT (about 18 hours after the trigger) for 300 sec. The
optical counterpart (Laha et al., GCN 26534) was detected with
r=18.4+/-0.1 (AB) by calibrating with the SkyMapper Southern Sky
Survey.