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GCN Circular 24424

Subject
Fermi GRB190508.11 Global MASTER-Net observations report
Date
2019-05-08T05:31:36Z (6 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
V. Lipunov, E. Gorbovskoy, V.Kornilov, D.Kuvshinov, N.Tyurina, P.Balanutsa,
A.Kuznetsov, V.V.Chazov, D. Vlasenko
(Lomonosov Moscow State University,
Sternberg Astronomical Institute, Moscow State University)

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

K. Ivanov, O. Gres, N.M. Budnev, S. Yazev, O. Chuvalaev, V. Poleshchuk
(Irkutsk State University)

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

R. Podesta, Carlos Lopez and F. Podesta
(Observatorio Astronomico Felix Aguilar (OAFA))

Hugo Levato and Carlos Saffe
(Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE))

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

D. Buckley, S. Potter, A. Kniazev, M. Kotze
(South African Astronomical Observatory)



MASTER-OAFA robotic telescope  (Global 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) started inspect of the Fermi GRB190508.11 (trigger No 578975670, 13h 48m 55.92s , -71d 52m 58.80s, R=24.55) errorbox  3931 sec after trigger time at 2019-05-08 03:39:56 UT, with upper limit up to  18.9 mag. The observations began at zenit distance = 41 deg. The sun  altitude  is -71.7 deg. 

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


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1012014

We obtain a following upper limits.  

Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________

    4022 | 2019-05-08 03:39:56 |         MASTER-OAFA | ( 13h 49m 38.25s , -47d 54m 29.20s) |   C |   180 | 18.6 |        
    4364 | 2019-05-08 03:45:38 |         MASTER-OAFA | ( 14h  9m 45.22s , -51d 54m 31.04s) |   C |   180 | 18.4 |        
    4589 | 2019-05-08 03:49:23 |         MASTER-OAFA | ( 13h 49m 39.80s , -47d 54m 38.84s) |   C |   180 | 18.9 |        
    4813 | 2019-05-08 03:53:07 |         MASTER-OAFA | ( 14h  1m 36.57s , -47d 54m 49.95s) |   C |   180 | 18.8 |        
    5039 | 2019-05-08 03:56:54 |         MASTER-OAFA | ( 14h  9m 47.34s , -51d 54m 39.60s) |   C |   180 | 18.5 |        
    5270 | 2019-05-08 04:00:44 |         MASTER-OAFA | ( 14h 22m 43.88s , -51d 54m 52.41s) |   C |   180 | 18.5 |        
    5496 | 2019-05-08 04:04:31 |         MASTER-OAFA | ( 14h  1m 35.82s , -47d 54m 53.61s) |   C |   180 | 18.8 |        
Filter C is a clear (unfiltred) band. 


The observation and reduction will continue. 
The message may be cited.