[vsnet-grb-info 20142] GRB 171210A: MASTER-Net optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  22238
SUBJECT: GRB 171210A: MASTER-Net optical observations 
DATE:    17/12/11 14:56:17 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov at xray.sai.msu.ru>

N.Tyurina, V. Lipunov, E. Gorbovskoy,V.Kornilov, 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-IAC robotic telescope (http://observ.pereplet.ru) started Fermi LAT 
GRB171210A  (Bissaldi et al. GCN 22228, t_trigger=2017-12-10 
11:49:15.26UT, RA, Dec = 335.29, 24.44 (J2000), 0.15deg (90%) 
stat.err.rad.) inspection at
2017-12-10 19:08:16UT (07h19m00.7s after trigger time) just after sunset.

The unfiltered mlim on the single images is 20.4 (180s exposition), and on 
the sum is 21m.

MASTER auto-detection System (Lipunov et al., 2010, Advances in Astronomy, 
vol. 2010, 30L)  didn't find optical counterpart.

http://observ.pereplet.ru/images/MASTERGRB171210AFermi.jpg


Observations were made on  zenit distance = 14 degrees, galaxy latitude b 
= -27 degree.

Dist. to Moon: 144.183815
Moon coord.: (176.084576 d, 5.105187 d
Lunar disk: 0.451595
Lunar phase: 95.555548
The sun  altitude  is -12.79


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