TITLE:   GCN CIRCULAR
NUMBER:  23293
SUBJECT: GRB 181002A: MASTER optical observation
DATE:    18/10/02 16:13:52 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@xray.sai.msu.ru>

V. Lipunov, E. Gorbovskoy, D. Vlasenko, N.Tiurina,V.Kornilov, A.Kuznetsov, V.Chazov, I.  Gorbunov,
D.Zimnukhov, D.Kuvshinov, P.Balanutsa, V.Vladimirov,
Lomonosov Moscow State University,SAI

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

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)

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-Tunka robotic telescope (MASTER-Net: http://observ.pereplet.ru,  Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located 
near Baykal lake in Russia (Applied Physics Institute, Irkutsk State University)
was pointed to the Swift GRB181002A (Gropp et al. GCN 23290, Beardmore et al. 
GCN 23292) 03h50min08sec after trigger time at 2018-10-02 2018-10-02 15:16:51 UT.

There is no astrophysical optical counterparts inside error-box
  (ra=04h 18m 59.19s dec=+15d 12' 46.4" r=2.0 arcsec) brighter than 20.3mag.

The message may be cited.

====================================================================

Galactic latitude: -23.628772, Galactic longitude: 179.675296

Observations started when
Object_Altitude was 17.32
Sun_Altitude: -37.57 
Moon_AAltitude: -0.05, Azimuth: 234.39