[vsnet-grb-info 12510] GRB 121017A optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  13877
SUBJECT: GRB 121017A optical observations
DATE:    12/10/17 21:48:00 GMT
FROM:    Alina Volnova at SAI MSU  <alinusss at gmail.com>

A. A. Volnova (SAI MSU, IKI RAS), A. S. Moskvitin (SAO RAS) on behalf
of larger collaboration, reports

We observed the field of GRB 121017A (Grupe et al., GCN Circ. 13875)
with the 1-m Zeiss-1000 telescope of SAO RAS
in Rc band. The weather conditions were good, airmass = 5 - 6, seeing
= 2.6". Observations were started since 9.5 minutes
after the BAT trigger, middle time t-t0 = 0.01407 days.

We do not detect any object in the XRT error circle down to a limiting
magnitude 18.8 as well as Jelínek et al. (GCN Circ. 13876).