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GCN Circular 31699

Subject
Swift GRB 220306B: Global MASTER-Net observations report
Date
2022-03-06T19:40:46Z (3 years ago)
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 Swift GRB 220306B ( R. Caputo et al., GCN 31697Loading...
 
 ) errorbox  3820 sec after notice time and 3846 sec after trigger time at 2022-03-06 19:19:44 UT, with upper limit up to  17.1 mag. The observations began at zenith distance = 55 deg. The sun  altitude  is -26.5 deg. 

MASTER-Kislovodsk robotic telescope  located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) was pointed to the Swift GRB 220306B errorbox  4093 sec after notice time and 4118 sec after trigger time at 2022-03-06 19:24:16 UT, with upper limit up to  17.9 mag. The observations began at zenith distance = 61 deg. The sun  altitude  is -44.4 deg. 

The galactic latitude b =  9 deg., longitude l = 121 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1903942

We obtain a following upper limits.  

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

    3937 |         MASTER-Amur |   R |   180 | 17.1 |        
    4136 |         MASTER-Amur |   R |   180 | 17.1 |        
    4209 |   MASTER-Kislovodsk |   C |   180 | 17.6 |        
    4209 |   MASTER-Kislovodsk |   C |   180 | 14.5 |        
    4336 |         MASTER-Amur |   R |   180 | 17.1 |        
    4409 |   MASTER-Kislovodsk |   C |   180 | 12.5 |        
    4536 |         MASTER-Amur |   R |   180 | 17.0 |        
    4534 |   MASTER-Kislovodsk |   C |    30 | 16.9 |        
    4534 |   MASTER-Kislovodsk |   C |    30 | 14.3 |        
    4584 |   MASTER-Kislovodsk |   C |    30 | 16.8 |        
    4584 |   MASTER-Kislovodsk |   C |    30 | 14.5 |        
    4709 |   MASTER-Kislovodsk |   C |   180 | 17.9 |        
    4709 |   MASTER-Kislovodsk |   C |   180 | 14.6 |        
    4735 |         MASTER-Amur |   R |   180 | 17.0 |        
Filter C is a clear (unfiltred) band. 


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