[vsnet-grb-info 25774] Fermi GRB 200531A: Global MASTER-Net observations report

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  27874
SUBJECT: Fermi GRB 200531A: Global MASTER-Net observations report 
DATE:    20/05/31 18:00:34 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov at 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 200531A ( Fermi GBM team, GCN 27870) errorbox  52660 sec after notice time and 52687 sec after trigger time at 2020-05-31 17:29:26 UT, with upper limit up to  18.7 mag. The observations began at zenith distance = 69 deg. The sun  altitude  is -22.2 deg. 

The galactic latitude b = 66 deg., longitude l = 196 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1369918

We obtain a following upper limits.  

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

   52718 | 2020-05-31 17:29:26 |         MASTER-SAAO | (10h 46m 11.37s , +36d 08m 43.4s) |   C |    60 | 18.7 |        
   52718 | 2020-05-31 17:29:26 |         MASTER-SAAO | (10h 45m 11.52s , +36d 07m 55.3s) |   C |    60 | 18.6 |        
   52798 | 2020-05-31 17:30:46 |         MASTER-SAAO | (10h 56m 10.98s , +36d 07m 51.0s) |   C |    60 | 18.7 |        
   52798 | 2020-05-31 17:30:46 |         MASTER-SAAO | (10h 55m 11.16s , +36d 07m 03.0s) |   C |    60 | 18.6 |        
   52877 | 2020-05-31 17:32:05 |         MASTER-SAAO | (11h 13m 35.60s , +38d 07m 06.9s) |   C |    60 | 18.5 |        
   52877 | 2020-05-31 17:32:06 |         MASTER-SAAO | (11h 12m 34.34s , +38d 06m 19.5s) |   C |    60 | 18.6 |        
   52957 | 2020-05-31 17:33:25 |         MASTER-SAAO | (11h 11m 12.09s , +40d 07m 43.2s) |   C |    60 | 18.3 |        
   52957 | 2020-05-31 17:33:25 |         MASTER-SAAO | (11h 02m 13.47s , +40d 06m 17.2s) |   C |    60 | 18.6 |        
   53245 | 2020-05-31 17:38:13 |         MASTER-SAAO | (10h 56m 05.86s , +36d 06m 51.1s) |   C |    60 | 18.4 |        
   53245 | 2020-05-31 17:38:13 |         MASTER-SAAO | (10h 55m 07.12s , +36d 06m 10.8s) |   C |    60 | 18.6 |        
   53325 | 2020-05-31 17:39:33 |         MASTER-SAAO | (11h 11m 12.29s , +40d 08m 48.9s) |   C |    60 | 18.0 |        
   53325 | 2020-05-31 17:39:33 |         MASTER-SAAO | (11h 02m 13.42s , +40d 07m 25.0s) |   C |    60 | 18.4 |        
   53405 | 2020-05-31 17:40:53 |         MASTER-SAAO | (11h 23m 02.23s , +40d 07m 03.9s) |   C |    60 | 18.3 |        
   53485 | 2020-05-31 17:42:13 |         MASTER-SAAO | (10h 35m 25.66s , +36d 09m 00.6s) |   C |    60 | 18.3 |        
   53485 | 2020-05-31 17:42:13 |         MASTER-SAAO | (10h 26m 55.17s , +36d 07m 35.4s) |   C |    60 | 18.6 |        
Filter C is a clear (unfiltred) band. 


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