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GCN Circular 23008

Subject
ANTARES neutrino Alert180713.02: MASTER optical observation
Date
2018-07-22T08:48:26Z (6 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
V.Lipunov, N.Tiurina,  E. Gorbovskoy, V. Lipunov, V.Kornilov, A.Kuznetsov, 
V.Chazov, I.  Gorbunov, D.Zimnukhov, D.Kuvshinov, P.Balanutsa, 
V.Vladimirov, D.Vlasenko
Lomonosov Moscow State University,SAI

D. Buckley,
South African Astronomical Observatory (SAAO)

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

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

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

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

O. Gres, N.M.Budnev , Yu.Ishmuhametova
Irkutsk State University (ISU)

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

MASTER II  robotic telescope (MASTER-Net: http://observ.pereplet.ru) 
located in SAAO was starting survey on the Antares   neutrino 
Alert180713.02 error-box (ra=07 53 16 dec=-44 19 01 r=1.8312)  7 days 
15734 sec after notice time and 7 days 15755 sec after trigger time at 
2018-07-21 16:44:30 UT. The 5-sigma upper limit on our second (180s 
exposure)  set is about 17.2 mag

The OT candidate available here 
https://196.21.94.34//master2/trans.php?wh=transients.coord2000@%27%3C%28118.317d%2C-44.3169d%29%2C3.6624d%3E%27%3A%3Ascircle+and+transients.datetime%3E%3D%272018-07-13+00%3A27%3A09.99%27&class=9&t2=Antares++neutrino+Alert180713.02+optical+counterpart+candidate

The full information about this  neutrino Alert180713.02 available here 
https://196.21.94.34//master2/grb.php?not=2018-07-13+00%3A27%3A30.841519&sat=Antares&gcrd=%28118.317d%2C-44.3169d%29&eb=1.8312&trig=2018-07-13+00%3A27%3A09.99&n= 
neutrino Alert180713.02

The observations made on zenit distance = 70 degrees, galaxy latitude b = 
-8 degree.
The moon (69 % bright part) is 64 degrees above the horizon. The distance 
between  moon and  object is 96
Observations started at twilight.
The sun  altitude  is -11.3 degree.
The object can be observed till sunrise at 2018-07-22 05:31:45.


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