[vsnet-grb-info 18383] GRB 160816A: TSHAO optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  19829
SUBJECT: GRB 160816A: TSHAO optical observations
DATE:    16/08/21 13:37:01 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen at iki.rssi.ru>

E. Mazaeva (IKI), I. Reva (Fesenkov Astrophysical Institute), A. Kusakin 
(Fesenkov Astrophysical Institute),  A. Volnova (IKI), A. Pozanenko 
(IKI) report on behalf of larger GRB follow-up collaboration:

We observed the field of 160816A  (Racusin et al., GCN 19802; Mailyan et 
al., GCN 19804)  with Zeiss-1000 (East) 1-m telescope of Tien Shan 
Astronomical Observatory. We obtained several images in R filter 
starting on August 17 and 18.  We detected  optical afterglow (Guidorzi 
et al. GCN 19808; Troja et al. GCN 19809) on Aug. 17 and obtained upper 
limit on Aug. 18. Preliminary photometry of a combined image is following

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

2016-08-17 21:32:28 1.19553  R      105*30 21.70  0.20  21.9
2016-08-18 19:11:47 2.11663  R      148*30 n/d    n/d   22.1


Photometry is based on nearby USNO-B1.0 stars
USNO-B1.0_id    R2
1271-0576219    17.27
1271-0576200    17.52
1271-0576190    18.12
1271-0576101    17.00