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GCN Circular 31637

Subject
Fermi GRB 220222B: Global MASTER-Net observations report
Date
2022-02-22T20:15:26Z (2 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, T.Pogrosheva, E.Minkina,
A.Chasovnikov, V.Topolev, V.Grinshpun, D.Kuvshinov,  D. Cheryasov
(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),

B.L.Carrasco, J.R.Valdes,V.Chavushyan, C.J.Martinez, V.M.Patino Alvarez,
M.L.H.Rodriguez (INAOE, OAGH)

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

A. Gabovich, V.Yurkov 
(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) started inspect of the Fermi GRB 220222B ( Fermi GBM team, GCN 31636Not found
 
 
) errorbox  437 sec after notice time and 466 sec after trigger time at 2022-02-22 19:31:53 UT, with upper limit up to  19.1 mag. The observations began at zenith distance = 70 deg. The sun  altitude  is -26.3 deg. 

The galactic latitude b = 29 deg., longitude l = 302 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1891717

We obtain a following upper limits.  

Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________

     497 | 2022-02-22 19:31:53 |         MASTER-SAAO | (12h 38m 40.72s , -31d 03m 17.8s) |   C |    60 | 18.6 |        
     576 | 2022-02-22 19:33:13 |         MASTER-SAAO | (12h 48m 07.15s , -31d 04m 10.3s) |   C |    60 | 18.5 |        
     656 | 2022-02-22 19:34:33 |         MASTER-SAAO | (12h 36m 35.08s , -32d 58m 40.5s) |   C |    60 | 18.9 |        
     736 | 2022-02-22 19:35:52 |         MASTER-SAAO | (12h 46m 03.63s , -32d 57m 06.5s) |   C |    60 | 18.7 |        
     815 | 2022-02-22 19:37:12 |         MASTER-SAAO | (12h 35m 07.91s , -34d 51m 18.9s) |   C |    60 | 19.0 |        
     895 | 2022-02-22 19:38:32 |         MASTER-SAAO | (12h 44m 45.80s , -34d 52m 03.4s) |   C |    60 | 18.9 |        
     975 | 2022-02-22 19:39:52 |         MASTER-SAAO | (12h 34m 28.35s , -36d 46m 05.6s) |   C |    60 | 19.0 |        
    1055 | 2022-02-22 19:41:12 |         MASTER-SAAO | (12h 44m 20.22s , -36d 47m 01.4s) |   C |    60 | 18.9 |        
    1134 | 2022-02-22 19:42:31 |         MASTER-SAAO | (12h 18m 24.18s , -32d 57m 43.7s) |   C |    60 | 19.1 |        
    1214 | 2022-02-22 19:43:51 |         MASTER-SAAO | (12h 27m 56.03s , -32d 58m 46.3s) |   C |    60 | 19.1 |        
    1475 | 2022-02-22 19:48:12 |         MASTER-SAAO | (12h 38m 39.30s , -31d 03m 19.7s) |   C |    60 | 18.9 |        
    1555 | 2022-02-22 19:49:32 |         MASTER-SAAO | (12h 48m 05.78s , -31d 04m 14.8s) |   C |    60 | 18.7 |        
    1635 | 2022-02-22 19:50:51 |         MASTER-SAAO | (12h 36m 27.81s , -32d 59m 16.5s) |   C |    60 | 18.9 |        
Filter C is a clear (unfiltred) band. 


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