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GCN Circular 25857

Subject
Fermi trigger No 591321287: Global MASTER-Net observations report
Date
2019-09-28T01:31:42Z (5 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, F.Balakin, 
V.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva, D.Kuvshinov 
(Lomonosov Moscow State University, SAI, Physics Department),

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

H.Levato 
(Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE),

R. Rebolo, M. Serra 
(The Instituto de Astrofisica de Canarias),

D. Buckley 
(South African Astronomical Observatory),

O.A. Gres, N.M. Budnev, O.Ershova 
(Irkutsk State University, API),

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

V. Yurkov, A. Gabovich, 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) started inspect of the Fermi GRB190928. (trigger No 591321287,06h 55m 16.080s , +53d 28m 58.80s, R=34.9) errorbox  2615 sec after notice time and 2694 sec after trigger time at 2019-09-28 00:39:36 UT, with upper limit up to  18.7 mag. The observations began at zenit distance = 79 deg. The sun  altitude  is -44.4 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=1151511

We obtain a following upper limits.  

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

    2784 | 2019-09-28 00:39:36 |         MASTER-SAAO | (06h 35m 47.982s , +20d 03m 42.44s) |   C |   180 | 15.2 |        
    3242 | 2019-09-28 00:47:14 |         MASTER-SAAO | (06h 32m 29.819s , +22d 03m 41.37s) |   C |   180 | 17.6 |        
    3462 | 2019-09-28 00:50:54 |         MASTER-SAAO | (06h 44m 17.719s , +20d 04m 19.94s) |   C |   180 | 16.7 |        
    3764 | 2019-09-28 00:55:56 |         MASTER-SAAO | (06h 38m 18.849s , +24d 04m 10.15s) |   C |   180 | 17.1 |        
    3993 | 2019-09-28 00:59:45 |         MASTER-SAAO | (06h 32m 28.426s , +22d 03m 45.77s) |   C |   180 | 18.6 |        
    4450 | 2019-09-28 01:07:22 |         MASTER-SAAO | (06h 41m 32.555s , +22d 03m 59.98s) |   C |   180 | 18.4 |        
    4674 | 2019-09-28 01:11:05 |         MASTER-SAAO | (06h 44m 20.126s , +20d 04m 28.93s) |   C |   180 | 18.7 |        
    4890 | 2019-09-28 01:14:42 |         MASTER-SAAO | (06h 49m 44.878s , +22d 04m 15.98s) |   C |   180 | 18.5 |        
Filter C is a clear (unfiltred) band. 


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