GCN Circular 23070

V. Lipunov, N.Tiurina, E. Gorbovskoy,
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)

In the process of regular survey, several MASTER telescopes accidentally 
shot the Fast Radio Burst  error box  near the date of the FRB 180725

So MASTER Global Robotic Net  (http://observ.pereplet.ru, Lipunov et al., 
2010, Advances in Astronomy, vol. 2010, 30L)
observed FRB 180725A error-box ( Boyle et al.  ATel #11901 , Trigger-time 
2018-07-25 17:59:43.115 UTC )  at:

MASTER-Tavrida
Date,UT                                                 unfiltered_mlim
2018-07-26 21:01:59-21:19:23                                  18.0
(Error-box_Altitude:23deg., SunAltitude:-25)
Nearest in time images    unfiltered_mlim
2018-05-20 20:37:00                                           18.9

MASTER-Kislovodsk :
Date,UT                                                 unfiltered_mlim
2018-07-26 20:30:48-20:52:30                                  18.0 
(Error-box_Altitude:  22deg. , 
SunAltitude:-26deg. )

2018-07-27 21:19:48,21:28:51                                  18.5
(Error-box_Altitude:  24deg.
SunAltitude:-27deg. )
Nearest in time UT images
2018-07-08 23:16:15                                           19.1

MASTER-Amur
Date,UT                                                 unfiltered_mlim
2018-07-25 15:41:28                                           15.2 
(Error-box_Altitude: 30deg., 
SunAltitude: -20deg.)

MASTER-IAC
nearest in time images:
Date,UT                                                 unfiltered_mlim
2017-12-20 06:37:13                                            18.5


There is no OT detection yet.

The covered map is vailable at
http://master.sai.msu.ru/static/FRB180725A.jpg

MASTER will reobserved this error-box in nearest night.

The message may be cited.