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GCN Circular 31849

Subject
Fermi GRB 220408A: Global MASTER-Net observations report
Date
2022-04-08T07:15:22Z (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, 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-OAGH robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Mexico (OAGH National Institute for Astrophysics, Optics and Electronics) started inspect of the Fermi GRB 220408A ( Fermi GBM team, GCN 31847Not found
 
 
) errorbox  3978 sec after notice time and 4007 sec after trigger time at 2022-04-08 06:52:52 UT, with upper limit up to  17.7 mag. The observations began at zenith distance = 18 deg. The sun  altitude  is -51.3 deg. 

The galactic latitude b = 68 deg., longitude l = 122 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1936539

We obtain a following upper limits.  

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

    4098 | 2022-04-08 06:52:52 |         MASTER-OAGH | (13h 25m 40.01s , +47d 07m 29.9s) |   C |   180 | 16.5 |        
    4098 | 2022-04-08 06:52:52 |         MASTER-OAGH | (13h 26m 12.76s , +46d 40m 00.5s) |   C |   180 | 17.7 |        
    4299 | 2022-04-08 06:56:13 |         MASTER-OAGH | (13h 25m 46.29s , +47d 06m 27.0s) |   C |   180 | 15.9 |        
    4299 | 2022-04-08 06:56:13 |         MASTER-OAGH | (13h 26m 19.51s , +46d 38m 57.5s) |   C |   180 | 17.4 |        
    4501 | 2022-04-08 06:59:35 |         MASTER-OAGH | (13h 25m 41.42s , +47d 05m 24.8s) |   C |   180 | 16.2 |        
    4501 | 2022-04-08 06:59:35 |         MASTER-OAGH | (13h 26m 14.91s , +46d 37m 55.1s) |   C |   180 | 17.7 |        
    4702 | 2022-04-08 07:02:56 |         MASTER-OAGH | (13h 25m 46.46s , +47d 05m 45.0s) |   C |   180 | 16.6 |        
    4702 | 2022-04-08 07:02:56 |         MASTER-OAGH | (13h 26m 19.98s , +46d 38m 15.0s) |   C |   180 | 17.7 |        
    4904 | 2022-04-08 07:06:18 |         MASTER-OAGH | (13h 25m 43.83s , +47d 06m 57.3s) |   C |   180 | 16.7 |        
    4904 | 2022-04-08 07:06:18 |         MASTER-OAGH | (13h 26m 17.35s , +46d 39m 27.8s) |   C |   180 | 17.7 |        
Filter C is a clear (unfiltred) band. 


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