[vsnet-grb-info 28262] GRB 210702A: Chilescope optical observations
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Sat Jul 3 21:51:21 JST 2021
TITLE: GCN CIRCULAR
NUMBER: 30365
SUBJECT: GRB 210702A: Chilescope optical observations
DATE: 21/07/03 12:48:04 GMT
FROM: Alexei Pozanenko at IKI, Moscow <apozanen at iki.rssi.ru>
S. Belkin (IKI), A. Pozanenko (IKI), N. Pankov (HSE, IKI), M. Krugov
(FAI) report on behalf of GRB IKI FuN collaboration:
We observed the field of Swift GRB 210702A (Lien et al., GCN 30351)
with Chilescope RC-1000 starting on 2021-07-02 (UT) 23:40:26 in
r'-filter. Within enhanced XRT position (D'Elia et al., GCN 30358) we
clearly detect the afterglow (Lien et al., GCN 30351; Lipunov et al.,
GCN 30352; Groot et al., GCN 30354; Kuin et al., GCN 30355; Kuin et al.,
GCN 30356; Xu et al., GCN 30357; Romanov et al., GCN 30364).
Preliminary photometry of the afterglow is following
Date UT start t-T0 Filter Exp. OT(AB) Err. UL(AB)
(mid, days) (s)
2021-07-02 23:40:26 0.193202 r' 1*600 17.01 0.05 19.7
The photometry is based on nearby stars from the APASS_DR8
RA DEC r
11:14:16.46880 -36:49:58.2132 15.187
11:14:36.96576 -36:48:30.0132 15.320
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