GCN Circular 23587

E. Gorbovskoy,  V. Lipunov, N.Tiurina,  V.Kornilov, 
P.Balanutsa, A.Kuznetsov, D.Vlasenko, F.Balakin
(Lomonosov Moscow State University, SAI),

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

H. Levato
(Instituto de Ciencias Astronomicas, de la Tierra y del Espacio of San Juan 
National University, Argentina)

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

D. Buckley (South African Astronomical Observatory),

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

O. Gress, N.M. Budnev, S. Yazev, O. Chuvalaev (Irkutsk State University, API)

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

MASTER-SAAO robotic telescope  (Global MASTER-Net: 
http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, 
vol. 2010, 30L)  located in South Africa (South African Astronomical 
Observatory) was pointed to the  FRB 181228A ( Ferah et al, #ATel 12335 ) 
17723 sec after trigger time at 2018-12-28 18:44:13 UT, with upper limit 
up to  22.0 mag. Observations started at twilight, immediately after 
sunset.  The observations began at zenit distance = 43 deg. The sun 
altitude  is -11.0 deg.

MASTER-OAFA robotic telescope  located in Argentina (OAFA observatory of 
San Juan National University) was pointed to the  FRB Alert181228.58 57672 
sec after trigger time at 2018-12-29 05:50:03 UT, with upper limit up to 
19.0 mag. The observations began at zenit distance = 24 deg. The sun 
altitude  is -33.0 deg.

The galactic latitude b = -60 deg., longitude l = 98 deg.

MASTER-OAFA auto-detection system ( Lipunov et al., "MASTER Global Robotic 
Net",
Advances in Astronomy, 2010, 30L ) discovered OT source at (RA, Dec) = 06h 
09m 25.17s -47d 32m 48.6s on 2018-12-29.34613 UT. The OT unfiltered 
magnitude is 17.9 m.
The OT is seen in 2 images. There is no minor planet at this place. OT is 
also visible  on 3  MASTER-SAAO images today night.
We have reference image without OT on 2017-11-11.33303 UT with magnitude 
limit in 'BLANK' filter 19.9m.

The Possible Super Nova discovered in PGC 499631 Galaxy (OT off set from 
galaxy  are 0.4W  2.5N), approximately 1.5 degree far away 
from FRG errorline. Its not coonected with FRB.

Spectral observations are required.

The discovery and reference images are available at:

http://master.sai.msu.ru/static/OT/060925.17-473248.6.png

Real time updated cover map available here:
http://master.sai.msu.ru/static//FRB/db/FRB181228A/img/FRB.png


The message may be cited.