[vsnet-grb-info 20908] GRB 180722A: MASTER optical observation

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  23006
SUBJECT: GRB 180722A: MASTER optical observation
DATE:    18/07/22 08:18:13 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov at xray.sai.msu.ru>

V. Lipunov, E. Gorbovskoy, N.Tiurina, 
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-OAFA robotic telescope (MASTER-Net: http://observ.pereplet.ru, 
Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in 
Argentina (OAFA observatory of San Juan National University) was pointed 
to the  GRB180722A( Shimomukai et al., MAXI/GSC detection, GCN #23005)
17  sec after notice  time and 2572 sec after trigger  time at 2018-07-22 
06:42:08 UT. On our  first (180s exposure)  set we  not found optical 
transient within MAXI error-box (ra=302.613 dec=24.2364  r=1) brighter 
then 17.7.


The observations made on zenit distance = 62 degrees, galaxy latitude b = 
-5 degrees.
The moon (74 % bright part) is  4 degrees above the horizon. The distance 
between  moon and  object is 75 .
The sun  altitude  is -61.0 degree.
The object can be observed till 2018-07-22 09:45:34.

  The message may be cited.