[vsnet-grb-info 20141] GRB 171209A: MASTER-Net optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  22237
SUBJECT: GRB 171209A: MASTER-Net optical observations
DATE:    17/12/11 14:05:44 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov at xray.sai.msu.ru>

E. Gorbovskoy, V. Lipunov, V.Kornilov, N.Tyurina, 
D.Kuvshinov, A.V.Krylov, I.Gorbunov, P.Balanutsa, A.Kuznetsov, V.V.Chazov, 
D. Vlasenko
Lomonosov Moscow State University, Sternberg Astronomical Institut of MSU

R.Podesta, C.Lopez, F. Podesta Observatorio Astronomico Felix Aguilar (OAFA),
National University of San Juan, Argentina

H. Levato, C. Saffe
Instituto de Ciencias Astronomicas,de la Tierra y del Espacio (ICATE),
San Juan, Argentina

D.Buckley, S. Potter, A.Kniazev, M.Kotze
South African Astronomical Observatory

R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres
The Instituto de Astrofisica de Canarias

O.Gres, K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk,
Irkutsk State University

V.Yurkov, Yu.Sergienko
Blagoveschensk Educational State University, Blagoveschensk

A. Tlatov, V.Senik, A.V. Parhomenko, D. Dormidontov
Kislovodsk Solar Station of the Pulkovo Observatory


MASTER II  robotic telescope (MASTER-Net: http://observ.pereplet.ru) 
located in OAFA was starting survey on the SWIFT  GRB171209A error-box 
(LaPorte et al. GCN 22213)   44912 sec after notice time and 44965 sec 
after trigger time at 2017-12-10 03:15:41 UT. The 5-sigma upper limit on 
our single  (180s exposure)  set is about 19.4-m and  20.0-m on coadd 
(3x180 = 540s) image. We not see OT previously reported by Kuin et al. GCN 
22221 , Guidorzi et al. GCN 22214 ,  Kong et al. GCN 22230.


MASTER II  robotic telescope (MASTER-Net: http://observ.pereplet.ru) 
located in SAAO  was starting survey on the SWIFT  GRB171209A   114607 
sec (~ 32 hours)  after trigger time at 2017-12-10 03:15:41 UT. The 
5-sigma upper limit on our single  (180s exposure)  set is about 19.4-m 
and  20.5-m on coadd (10 x 180 = 1800 s) image.  Here we also not see any 
OT.



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