[vsnet-grb-info 24928] GRB 200205B: Chilescope optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  27027
SUBJECT: GRB 200205B: Chilescope optical observations
DATE:    20/02/09 13:51:47 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen at iki.rssi.ru>

E. Mazaeva (IKI), A. Pozanenko (IKI), M. Krugov (AFIF),  A. Volnova 
(IKI), S. Belkin (IKI) report on behalf of IKI-FuN follow-up collaboration:

We observed  the Swift GRB 200205B (Evans et al., GCN 26993)  with 
Chilescope RC-1000 started on Feb. 7 (UT) 03:04:55 in r'-filter. We 
marginally detect optical afterglow (Lipunov et al., GCN 26991; Evans et 
al., GCN 26993;   Strausbaugh  et al., GCN 26995; Vielfaure et al., GCN 
26998; Malesani et al., GCN 27004; Simpson et al., GCN 27006).

Preliminary photometry is following.

Date       UT start MJD_mid     Filter Exp.   OT(AB) S/N UL
                     (mid, days)    (s)

2020-02-07 03:04:55 1.33613     r'     2*1200 22.2   2.0 22.0

The photometry is based on nearby stars from the SkyMapper catalog
SkyMapper_id    r
293365688    17.550
293359963    16.213
293359881    15.816
293365677    17.659