[vsnet-grb-info 5289] GRB071010b: optical observation

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  6977
SUBJECT: GRB071010b: optical observation
DATE:    07/10/22 18:22:00 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen at iki.rssi.ru>

V. Rumyantsev (CrAO),   A. Pozanenko (IKI) report on behalf of larger GRB 
follow-up collaboration:

We observed the optical afterglow (Oksanen GCN 6873, Kann et al. GCN 6884) 
of  GRB071010b  (Markwardt  et al., GCN 6871) in R-band on Oct.19 between 
(UT) 01:39:50 - 02:54:14  with Zeiss-1000 (Simeiz) telescope of CrAO 
observatory.  Based on  USNO-A2.0 star RA (J2000) = 10 01 59.67, Dec. 
(J2000) = +45 46 12.80, R=18.30 we estimated brightness of  the optical 
afterglow:

T0+,       Exposure,   R_mag,   err
(mid time)

8.230 d    58x60 s     21.9     +0.37 -0.27

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