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GCN Circular 28296

Subject
Fermi GRB 200824A: Global MASTER-Net observations report
Date
2020-08-27T19:09:07Z (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),

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-Tavrida robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the Fermi GRB 200824A ( Fermi GBM team, GCN 28283) errorbox  2 days 40217 sec after notice time and 2 days 40245 sec after trigger time at 2020-08-27 01:26:24 UT, with upper limit up to  16.4 mag. Observations started at twilight.  The observations began at zenith distance = 64 deg. The sun  altitude  is -16.3 deg. 

MASTER-OAFA robotic telescope  located in Argentina (OAFA observatory of San Juan National University) started inspect of the Fermi GRB 200824A errorbox  2 days 68646 sec after notice time and 2 days 68673 sec after trigger time at 2020-08-27 09:20:12 UT, with upper limit up to  17.7 mag. The observations began at zenith distance = 66 deg. The sun  altitude  is -21.4 deg. 

The galactic latitude b = 18 deg., longitude l = 211 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1425935

We obtain a following upper limits.  

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

  213075 | 2020-08-27 01:26:24 |      MASTER-Tavrida | (07h 12m 38.47s , +24d 02m 24.8s) |   C |    60 | 14.7 |        
  214850 | 2020-08-27 01:55:58 |      MASTER-Tavrida | (07h 19m 46.57s , +26d 02m 10.0s) |   C |    60 | 16.4 |        
  214931 | 2020-08-27 01:57:19 |      MASTER-Tavrida | (07h 17m 32.19s , +20d 00m 58.9s) |   C |    60 | 15.2 |        
  215011 | 2020-08-27 01:58:40 |      MASTER-Tavrida | (07h 07m 36.58s , +16d 00m 47.4s) |   C |    60 | 14.0 |        
  215418 | 2020-08-27 02:05:26 |      MASTER-Tavrida | (06h 47m 06.52s , +14d 01m 43.5s) |   C |    60 | 15.4 |        
  215579 | 2020-08-27 02:08:08 |      MASTER-Tavrida | (06h 50m 54.44s , +16d 02m 17.9s) |   C |    60 | 15.3 |        
  241503 | 2020-08-27 09:20:12 |         MASTER-OAFA | (07h 22m 58.21s , -02d 39m 33.4s) |   C |    60 | 17.7 |        
  244022 | 2020-08-27 10:02:11 |         MASTER-OAFA | (07h 22m 58.79s , -02d 38m 33.0s) |   C |    60 | 17.4 |        
  244102 | 2020-08-27 10:03:30 |         MASTER-OAFA | (07h 30m 54.12s , -02d 39m 18.0s) |   C |    60 | 17.4 |        
  244397 | 2020-08-27 10:08:26 |         MASTER-OAFA | (06h 46m 38.15s , +13d 20m 22.5s) |   C |    60 | 17.2 |        
  244477 | 2020-08-27 10:09:45 |         MASTER-OAFA | (07h 03m 11.85s , +13d 20m 43.8s) |   C |    60 | 16.7 |        
  244558 | 2020-08-27 10:11:06 |         MASTER-OAFA | (06h 54m 48.45s , +17d 20m 41.9s) |   C |    60 | 16.7 |        
  244638 | 2020-08-27 10:12:26 |         MASTER-OAFA | (07h 07m 02.70s , +15d 19m 02.3s) |   C |    60 | 16.5 |        
Filter C is a clear (unfiltred) band. 


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