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GCN Circular 28143

Subject
Fermi GRB 200718A: Global MASTER-Net observations report
Date
2020-07-18T22:45:15Z (4 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,  D. Cheryasov
(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 GRB 200718A ( Fermi GBM team, GCN 28140) errorbox  24097 sec after notice time and 24129 sec after trigger time at 2020-07-18 21:33:02 UT, with upper limit up to  20.4 mag. The observations began at zenith distance = 32 deg. The sun  altitude  is -70.4 deg. 

The galactic latitude b = 10 deg., longitude l = 26 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1403477

We obtain a following upper limits.  

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

   24220 | 2020-07-18 21:33:02 |         MASTER-SAAO | (18h 46m 18.81s , +00d 03m 58.2s) |   C |   180 | 19.1 |        
   24220 | 2020-07-18 21:33:02 |         MASTER-SAAO | (18h 39m 29.75s , +00d 03m 03.8s) |   C |   180 | 19.3 |        
   24419 | 2020-07-18 21:36:21 |         MASTER-SAAO | (18h 46m 12.45s , +00d 03m 32.9s) |   C |   180 | 20.1 |        
   24419 | 2020-07-18 21:36:21 |         MASTER-SAAO | (18h 39m 23.34s , +00d 02m 37.4s) |   C |   180 | 19.5 |        
   24619 | 2020-07-18 21:39:41 |         MASTER-SAAO | (18h 46m 13.45s , +00d 04m 39.1s) |   B |   180 | 20.4 |        
   24619 | 2020-07-18 21:39:41 |         MASTER-SAAO | (18h 39m 24.06s , +00d 03m 42.6s) |   V |   180 | 18.4 |        
   24819 | 2020-07-18 21:43:01 |         MASTER-SAAO | (18h 46m 18.45s , +00d 03m 41.8s) |   B |   180 | 20.3 |        
   24819 | 2020-07-18 21:43:01 |         MASTER-SAAO | (18h 39m 29.05s , +00d 02m 44.8s) |   V |   180 | 18.4 |        
   25018 | 2020-07-18 21:46:20 |         MASTER-SAAO | (18h 46m 11.15s , +00d 02m 44.3s) |   B |   180 | 20.4 |        
   25018 | 2020-07-18 21:46:20 |         MASTER-SAAO | (18h 39m 21.74s , +00d 01m 47.1s) |   V |   180 | 18.4 |        
   25218 | 2020-07-18 21:49:40 |         MASTER-SAAO | (18h 46m 17.22s , +00d 03m 07.3s) |   R |   180 | 18.5 |        
   25218 | 2020-07-18 21:49:40 |         MASTER-SAAO | (18h 39m 27.79s , +00d 02m 19.8s) |   I |   180 | 18.0 |        
   25418 | 2020-07-18 21:53:00 |         MASTER-SAAO | (18h 46m 13.86s , +00d 04m 19.2s) |   R |   180 | 18.4 |        
   25418 | 2020-07-18 21:53:00 |         MASTER-SAAO | (18h 39m 24.44s , +00d 03m 31.6s) |   I |   180 | 17.8 |        
   25618 | 2020-07-18 21:56:20 |         MASTER-SAAO | (18h 46m 13.32s , +00d 02m 44.8s) |   R |   180 | 18.4 |        
   25618 | 2020-07-18 21:56:20 |         MASTER-SAAO | (18h 39m 23.91s , +00d 01m 57.0s) |   I |   180 | 17.9 |        
Filter C is a clear (unfiltred) band. 


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