TITLE:   GCN CIRCULAR
NUMBER:  20121
SUBJECT: IceCube-161103: MASTER follow-up observations
DATE:    16/11/03 22:35:52 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@xray.sai.msu.ru>

V.M. Lipunov, A.Tatarnikov, N.V.Tyurina,  E.S. Gorbovskoy, A.S.Kuznetsov,
P.Balanutsa, V.V.Vladimirov, V.V.Chazov, D.Kuvshinov, 
Lomonosov Moscow State University, Sternberg Astronomical Institute

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

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

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

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

R. Podesta, C. Lopez,  F.Podest
Observatorio Astronomico Felix Aguilar (OAFA)

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

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

MASTER-SAAO  robotic telescope (MASTER-Net http://observ.pereplet.ru) 
located in South Africa was pointed to the  IceCube-161103 alert (Taboada 
et al.  GCN 20119, GCN 20120) at 2016-11-03 18:06:35 UT (32344 sec 
after the trigger time 2016-11-03 09:07:31.12 UT).

MASTER auto-detection system  doesn't find optical transient within 
error-box brighter then unfiltered mlim=20.2 mag (the 5-sigma upper 
limit), W=0.2B+0.8R calibrated by USNO-B1.

The observations made on  77 degrees zenit distance , galaxy latitude b = 
-41 degree.
The moon (14 % bright part) is 26 degrees above the horizon. The distance 
between  moon and  object is 137deg.
Observations started in twilight. The sun  altitude  is -13.1 degree.
The object can be observed till sunrise at 2016-11-04 03:35:05


MASTER-Kislovodsk robotic telescope  was pointed to the   IceCube-161103 
alert  32819 sec after  trigger time on  2016-11-03 18:14:30 UT.
MASTER auto-detection system doesn't found optical transient within 
error-box  brighter then 20.5m (unfiltered  5-sigma upper limit)

The observations made on zenit distance = 47 degrees, galaxy latitude b = -41 degree.
The moon (14 % bright part) below the horizon (The altitude of the Moon is -16 degree ).
The sun  altitude  is -46.1 degree.
The object can be observed till sunrise at 2016-11-04 03:47:43

The message may be cited.