GRB 200205.81

D. Buckley, S. Potter, A. Kniazev, M. Kotze
South African Astronomical Observatory

V. Lipunov, E. Gorbovskoy, V.Kornilov, D.Kuvshinov, N.Tyurina, P.Balanutsa,
A.Kuznetsov, D. Vlasenko, F. Balakin
Lomonosov Moscow State University,
Sternberg Astronomical Institute, Moscow State University

K. Ivanov, O. Gres, N.M. Budnev, S. Yazev, O. Chuvalaev, V. Poleshchuk
Irkutsk State University

A. Tlatov, V.Senik, A.V. Parhomenko, D. Dormidontov
Kislovodsk Solar Station of the Pulkovo Observatory

V. Yurkov, A. Gabovich, Yu. Sergienko
Blagoveschensk Educational State University, Blagoveschensk

R. Podesta, Carlos Lopez and F. Podesta
Observatorio Astronomico Felix Aguilar (OAFA)

Hugo Levato
Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)

R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres
The Instituto de Astrofisica de Canarias

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) was pointed to the  GRB200205.81 21 sec after notice time and 300 sec after trigger time at 2020-02-05 19:26:44 UT. On our first (60s exposure)  set we  found 1 optical transient within Swift error-box (ra=107.8 dec=-56.4808 r=0.05) brighter than  15.7.


 T-Tmid      Date      Time       Expt.        Ra                Dec           Mag
---------|---------------------|-------|-----------------|-----------------|-------
     330   2020-02-05 19:26:44      60   (07h 11m 09.07s , -56d 29m 14.6s)     16.3

The 5-sigma upper limit has been about  15.7mag
The message may be cited.

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) was pointed to the Swift GRB200205.81 (trigger No 954519,07h 11m 12.72s , -56d 28m 51.6s, R=0.05) errorbox  21 sec after notice time and 300 sec after trigger time at 2020-02-05 19:26:44 UT, with upper limit up to  18.0 mag. The observations began at zenith distance = 28 deg. The sun  altitude  is -21.2 deg. 

The galactic latitude b = -20 deg., longitude l = 267 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1278994

We obtain a following upper limits.  

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

     331 |         MASTER-SAAO |  P\ |    60 | 16.2 |        
     411 |         MASTER-SAAO |  P\ |   220 | 16.8 |  Coadd 
     419 |         MASTER-SAAO |  P\ |    70 | 16.6 |        
     521 |         MASTER-SAAO |  P\ |    90 | 16.9 |        
     642 |         MASTER-SAAO |  P\ |   110 | 17.5 |        
     797 |         MASTER-SAAO |  P\ |   420 | 18.0 |  Coadd 
     789 |         MASTER-SAAO |  P\ |   140 | 17.5 |        
     966 |         MASTER-SAAO |  P\ |   170 | 17.6 |        


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