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GCN Circular 25428

Subject
Fermi trigger No 588100239 Global MASTER-Net observations report
Date
2019-08-21T17:31:15Z (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 GRB190821.72 (trigger No 588100239, 16h 55m 57.60s , -38d 37m 12.00s, R=7.21) errorbox  10 sec after trigger time at 2019-08-21 17:10:44 UT, with upper limit up to  17.3 mag. Observations started at twilight.  The observations began at zenit distance =  3 deg. The sun  altitude  is -12.4 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=1111565

We obtain a following upper limits.  

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

      15 | 2019-08-21 17:10:44 |         MASTER-SAAO | ( 16h 41m 19.25s , -33d 57m 12.76s) |  P\ |    10 | 16.3 |        
      42 | 2019-08-21 17:11:10 |         MASTER-SAAO | ( 16h 40m 18.01s , -33d 57m 11.66s) |  P\ |    10 | 16.4 |        
      67 | 2019-08-21 17:11:10 |         MASTER-SAAO | ( 16h 40m 18.01s , -33d 57m 11.62s) |  P\ |    60 | 17.3 |  Coadd 
      73 | 2019-08-21 17:11:36 |         MASTER-SAAO | ( 16h 40m 18.03s , -33d 57m 11.45s) |  P\ |    20 | 16.9 |        


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