TITLE:   GCN CIRCULAR
NUMBER:  35681
SUBJECT: Swift GRB240205.93: Global MASTER-Net observations report
DATE:    24/02/05 22:19:22 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>

V. Lipunov, V.Kornilov, E. Gorbovskoy, K. Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.Senik,  D. Vlasenko,
G.Antipov, D.Zimnukhov, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D. Cheryasov, Ya.Kechin, Yu.Tselik, A. Sosnovskij
(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. Gress, N.M. Budnev, O.Ershova
(Irkutsk State University, API),

L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez,
A.R.Corella, L.H.Rodriguez
(INAOE, Guillermo Haro Astrophysics Observatory),

A. Tlatov, D. Dormidontov
(Kislovodsk Solar Station of the Pulkovo Observatory),

V. Yurkov, A. Gabovich
(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 GRB240205.93 (trigger No 1213095,23h 25m 54.24s , -55d 07m 55.2s, R=0.05) errorbox  26 sec after notice time and 47 sec after trigger time at 2024-02-05 22:13:54 UT, with upper limit up to  15.9 mag. The observations began at zenith distance = 86 deg. The sun  altitude  is -41.1 deg. 

The galactic latitude b = -58 deg., longitude l = 326 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2371949

We obtain a following upper limits.  

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

      53 |         MASTER-SAAO | P\\ |    10 | 13.1 |        
      53 |         MASTER-SAAO |  P/ |    10 | 15.3 |        
      71 |         MASTER-SAAO |  P/ |    10 | 15.3 |        
      71 |         MASTER-SAAO | P\\ |    10 | 13.1 |        
      93 |         MASTER-SAAO |  P/ |    20 | 15.9 |        


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