[vsnet-grb-info 17635] GRB 160223A: AbAO optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  19072
SUBJECT: GRB 160223A: AbAO optical observations
DATE:    16/02/24 20:22:47 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen at iki.rssi.ru>

E. Mazaeva (IKI), R. Inasaridze (AbAO), V. Ayvazian (AbAO), A. Volnova 
(IKI), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger
GRB follow-up collaboration:

We observed the field of Swift and Fermi GRB 160223A (Markwardt et
al., GCN 19057; Veres  et al., GCN 19064) with AS-32 (0.7m) telescope of 
Abastumani Observatory starting on Feb. 23 (UT) 23:51:22. We obtained 
several unfiltered images of the field. We do not detect afterglow 
candidate (Bolmer et al., GCN 19058) down to 20.4m. A preliminary 
photometry of the field is following


Date         UT start      t-T0       Filter     Exp.    UL (3 sigma)
                              (mid, days)           (s)

2016-02-23 23:51:22    0.96907  none    21*120  20.4

photometry is based on nearby  stars of SDSS DR9 catalog, Lupton 
transformation into R.