TITLE:   GCN CIRCULAR
NUMBER:  27427
SUBJECT: Swift GRB200324.69: Global MASTER-Net observations report 
DATE:    20/03/24 16:54:49 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),

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-Amur robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Blagoveshchensk State Pedagogical University) was pointed to the Swift GRB200324.69 (trigger No 963260,14h 50m 44.40s , +35d 58m 04.8s, R=0.05) errorbox  16 sec after notice time and 58 sec after trigger time at 2020-03-24 16:40:06 UT, with upper limit up to  16.3 mag. The observations began at zenith distance = 22 deg. The sun  altitude  is -36.6 deg. 

The galactic latitude b = 63 deg., longitude l = 59 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1320927

We obtain a following upper limits.  

Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

      64 |         MASTER-Amur |  P/ |    10 | 15.8 |        
      91 |         MASTER-Amur |  P/ |    20 | 15.9 |        
     126 |         MASTER-Amur |  P/ |    20 | 15.9 |        
     163 |         MASTER-Amur |  P/ |    30 | 16.1 |        
     225 |         MASTER-Amur |  P/ |    40 | 16.3 |        
     282 |         MASTER-Amur |  P/ |    50 | 16.3 |        
     350 |         MASTER-Amur |  P/ |    60 | 16.3 |        
     429 |         MASTER-Amur |  P/ |    60 | 16.3 |        
     509 |         MASTER-Amur |  P/ |    60 | 16.2 |        
     657 |         MASTER-Amur |  P/ |    60 | 16.3 |        


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