TITLE:   GCN CIRCULAR
NUMBER:  31742
SUBJECT: Integral GRB220311.69: Global MASTER-Net observations report 
DATE:    22/03/11 16:57:12 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, D. Vlasenko, 
G.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov,  D.Cheryasov, Ya.Kechin
(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
(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),

A. Gabovich, V.Yurkov 
(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 Integral GRB220311.69 (trigger No 9769,10h 32m 03.74s , +66d 04m 03.8s, R=0.0516667) errorbox  15 sec after notice time and 30 sec after trigger time at 2022-03-11 16:33:46 UT, with upper limit up to  16.4 mag. The observations began at zenith distance = 21 deg. The sun  altitude  is -42.3 deg. 

MASTER-Tavrida robotic telescope  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) was pointed to the Integral GRB220311.69 errorbox  195 sec after notice time and 210 sec after trigger time at 2022-03-11 16:36:46 UT, with upper limit up to  16.1 mag. Observations started at twilight.  The observations began at zenith distance = 41 deg. The sun  altitude  is -10.4 deg. 

The galactic latitude b = 46 deg., longitude l = 142 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1907358

We obtain a following upper limits.  

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

      36 |         MASTER-Amur |  P\ |    10 | 14.4 |        
      65 |         MASTER-Amur |  P\ |    10 | 14.5 |        
     230 |         MASTER-Amur |  P\ |    40 | 15.6 |        
     231 |      MASTER-Tavrida |  P\ |    40 | 15.0 |        
     294 |         MASTER-Amur |  P\ |    50 | 15.0 |        
     295 |      MASTER-Tavrida |  P\ |    50 | 14.9 |        
     374 |         MASTER-Amur |  P\ |    70 | 15.5 |        
     369 |      MASTER-Tavrida |  P\ |    60 | 14.5 |        
     459 |      MASTER-Tavrida |  P\ |    80 | 15.5 |        
     468 |         MASTER-Amur |  P\ |    80 | 15.5 |        
     568 |      MASTER-Tavrida |  P\ |   100 | 15.1 |        
     578 |         MASTER-Amur |  P\ |   100 | 15.7 |        
     698 |      MASTER-Tavrida |  P\ |   120 | 16.1 |        
     712 |         MASTER-Amur |  P\ |   130 | 15.7 |        
     893 |         MASTER-Amur |  P\ |   160 | 16.3 |        
    1083 |         MASTER-Amur |  P\ |   180 | 16.4 |        


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