[vsnet-grb-info 18858] GRB 161219B: ISON/Terskol optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  20309
SUBJECT: GRB 161219B: ISON/Terskol optical observations
DATE:    16/12/20 21:25:52 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen at iki.rssi.ru>

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

We observed the field of GRB 161219B (Swift trigger 727541; D'Ai,
GCN 20296) with K-800 (0.8m) telescope  of ISON/Terskol   observatory 
starting  on December, 19 (UT) 18:57:51, i.e. about 9 minutes after GRB 
onset.  We obtained several unfiltered images of 30 s exposure. The 
optical afterglow (D'Ai et al., GCN 20296; Kruehler et al., GCN 20299; 
Guidorzi et al., GCN 20300; Martin-Carrillo et al., GCN 20305) is 
clearly visible in separate images. Preliminary light curve of the 
afterglow can be found in

http://grb.rssi.ru/GRB161219B/GRB161219B_161219_K800.png

Photometry is based on nearby USNO-B1.0 stars
USNO-B.1_id     R2
0631-0120570    13.78
0632-0119151    14.86
0632-0119187    14.03
0632-0119198    15.05
0632-0119218    14.66
0631-0120752    14.81