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GCN Circular 28494

Subject
Fermi GRB 200924A: Global MASTER-Net observations report
Date
2020-09-25T02:30:12Z (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-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 GRB 200924A ( Fermi GBM team, GCN 28489) errorbox  60129 sec after notice time and 60192 sec after trigger time at 2020-09-25 01:58:33 UT, with upper limit up to  15.3 mag. The observations began at zenith distance = 27 deg. The sun  altitude  is -42.6 deg. 

The galactic latitude b = -42 deg., longitude l = 340 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1448070

We obtain a following upper limits.  

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

   60223 | 2020-09-25 01:58:33 |         MASTER-OAFA | (20h 49m 51.22s , -56d 45m 39.8s) |   C |    60 | 14.1 |        
   60302 | 2020-09-25 01:59:52 |         MASTER-OAFA | (20h 58m 38.41s , -58d 46m 15.3s) |   C |    60 | 14.4 |        
   60382 | 2020-09-25 02:01:12 |         MASTER-OAFA | (21h 18m 29.02s , -56d 46m 11.2s) |   C |    60 | 14.7 |        
   60461 | 2020-09-25 02:02:32 |         MASTER-OAFA | (21h 10m 38.64s , -54d 48m 00.6s) |   C |    60 | 14.4 |        
   60541 | 2020-09-25 02:03:51 |         MASTER-OAFA | (20h 49m 54.34s , -56d 47m 10.7s) |   C |    60 | 14.0 |        
   60620 | 2020-09-25 02:05:11 |         MASTER-OAFA | (21h 04m 11.26s , -56d 45m 59.3s) |   C |    60 | 14.3 |        
   60700 | 2020-09-25 02:06:30 |         MASTER-OAFA | (20h 58m 35.48s , -58d 47m 45.6s) |   C |    60 | 14.2 |        
   60779 | 2020-09-25 02:07:50 |         MASTER-OAFA | (21h 13m 45.91s , -58d 46m 14.1s) |   C |    60 | 14.4 |        
   60859 | 2020-09-25 02:09:09 |         MASTER-OAFA | (21h 18m 29.63s , -56d 47m 10.6s) |   C |    60 | 14.5 |        
   60938 | 2020-09-25 02:10:29 |         MASTER-OAFA | (21h 32m 50.07s , -56d 46m 25.7s) |   C |    60 | 14.9 |        
   61018 | 2020-09-25 02:11:48 |         MASTER-OAFA | (20h 43m 22.03s , -54d 47m 26.8s) |   C |    60 | 14.1 |        
   61098 | 2020-09-25 02:13:08 |         MASTER-OAFA | (21h 09m 59.77s , -60d 46m 15.1s) |   C |    60 | 14.4 |        
   61177 | 2020-09-25 02:14:28 |         MASTER-OAFA | (21h 10m 42.46s , -54d 47m 36.9s) |   C |    60 | 14.5 |        
   61257 | 2020-09-25 02:15:47 |         MASTER-OAFA | (21h 24m 24.41s , -54d 46m 37.7s) |   C |    60 | 14.9 |        
   61337 | 2020-09-25 02:17:07 |         MASTER-OAFA | (21h 04m 07.90s , -56d 46m 53.8s) |   C |    60 | 14.8 |        
   61416 | 2020-09-25 02:18:27 |         MASTER-OAFA | (21h 13m 40.79s , -58d 46m 06.5s) |   C |    60 | 15.3 |        
   61496 | 2020-09-25 02:19:46 |         MASTER-OAFA | (21h 32m 54.91s , -56d 47m 24.9s) |   C |    60 | 15.0 |        
   61775 | 2020-09-25 02:24:25 |         MASTER-OAFA | (20h 43m 28.21s , -54d 47m 10.1s) |   C |    60 | 14.2 |        
Filter C is a clear (unfiltred) band. 


The observation and reduction will continue. 
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