TITLE:   GCN CIRCULAR
NUMBER:  28386
SUBJECT: Fermi GRB 200906A: Global MASTER-Net observations report 
DATE:    20/09/07 21:32:09 GMT
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 200906A ( Fermi GBM team, GCN 28370) errorbox  1 days 28040 sec after notice time and 1 days 28073 sec after trigger time at 2020-09-07 20:59:46 UT, with upper limit up to  18.7 mag. The observations began at zenith distance = 41 deg. The sun  altitude  is -39.4 deg. 

The galactic latitude b = 30 deg., longitude l = 99 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1434684

We obtain a following upper limits.  

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

  114563 | 2020-09-07 20:59:46 |      MASTER-Tavrida | (18h 06m 25.68s , +67d 46m 47.4s) |   C |   180 | 18.6 |        
  114764 | 2020-09-07 21:03:07 |      MASTER-Tavrida | (18h 06m 28.97s , +67d 47m 45.3s) |   C |   180 | 18.7 |        
  114965 | 2020-09-07 21:06:28 |      MASTER-Tavrida | (18h 06m 23.16s , +67d 46m 55.2s) |   C |   180 | 18.6 |        
  115166 | 2020-09-07 21:09:49 |      MASTER-Tavrida | (18h 06m 25.23s , +67d 47m 41.8s) |   C |   180 | 18.7 |        
  115366 | 2020-09-07 21:13:09 |      MASTER-Tavrida | (18h 06m 30.87s , +67d 46m 28.9s) |   C |   180 | 18.7 |        
  115567 | 2020-09-07 21:16:30 |      MASTER-Tavrida | (18h 06m 25.58s , +67d 45m 15.3s) |   C |   180 | 18.6 |        
  115769 | 2020-09-07 21:19:52 |      MASTER-Tavrida | (18h 06m 32.36s , +67d 45m 24.9s) |   C |   180 | 18.6 |        
  115970 | 2020-09-07 21:23:13 |      MASTER-Tavrida | (18h 06m 30.08s , +67d 46m 46.7s) |   C |   180 | 18.6 |        
Filter C is a clear (unfiltred) band. 


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