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GCN Circular 31694

Subject
Fermi GRB 220306A: Global MASTER-Net observations report
Date
2022-03-06T07:45:26Z (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-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 220306A ( Fermi GBM team, GCN 31693) errorbox  218 sec after notice time and 247 sec after trigger time at 2022-03-06 07:24:07 UT, with upper limit up to  18.6 mag. The observations began at zenith distance = 67 deg. The sun  altitude  is -64.7 deg. 

The galactic latitude b = 32 deg., longitude l = 295 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1903572

We obtain a following upper limits.  

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

     277 | 2022-03-06 07:24:07 |         MASTER-OAGH | (12h 43m 10.46s , -31d 06m 52.7s) |   C |    60 | 16.5 |        
     277 | 2022-03-06 07:24:07 |         MASTER-OAGH | (12h 43m 39.85s , -31d 28m 56.5s) |   C |    60 | 17.2 |        
     359 | 2022-03-06 07:25:29 |         MASTER-OAGH | (12h 25m 33.30s , -31d 06m 49.8s) |   C |    60 | 17.7 |        
     359 | 2022-03-06 07:25:29 |         MASTER-OAGH | (12h 26m 02.33s , -31d 28m 53.8s) |   C |    60 | 18.1 |        
     440 | 2022-03-06 07:26:50 |         MASTER-OAGH | (12h 32m 34.88s , -27d 17m 19.0s) |   C |    60 | 17.5 |        
     440 | 2022-03-06 07:26:50 |         MASTER-OAGH | (12h 33m 01.91s , -27d 39m 35.9s) |   C |    60 | 18.1 |        
     521 | 2022-03-06 07:28:11 |         MASTER-OAGH | (12h 41m 06.55s , -33d 00m 46.7s) |   C |    60 | 16.7 |        
     521 | 2022-03-06 07:28:11 |         MASTER-OAGH | (12h 41m 36.95s , -33d 22m 50.6s) |   C |    60 | 17.8 |        
     603 | 2022-03-06 07:29:33 |         MASTER-OAGH | (12h 23m 03.58s , -32d 59m 12.1s) |   C |    60 | 16.7 |        
     603 | 2022-03-06 07:29:33 |         MASTER-OAGH | (12h 23m 33.61s , -33d 21m 13.2s) |   C |    60 | 17.6 |        
     684 | 2022-03-06 07:30:54 |         MASTER-OAGH | (12h 15m 27.68s , -27d 18m 06.2s) |   C |    60 | 17.4 |        
     684 | 2022-03-06 07:30:54 |         MASTER-OAGH | (12h 15m 54.19s , -27d 40m 22.8s) |   C |    60 | 18.0 |        
     766 | 2022-03-06 07:32:16 |         MASTER-OAGH | (12h 11m 14.54s , -29d 11m 08.2s) |   C |    60 | 16.6 |        
     766 | 2022-03-06 07:32:16 |         MASTER-OAGH | (12h 11m 41.70s , -29d 33m 19.8s) |   C |    60 | 17.7 |        
     847 | 2022-03-06 07:33:37 |         MASTER-OAGH | (12h 20m 24.64s , -25d 24m 05.3s) |   C |    60 | 17.6 |        
     847 | 2022-03-06 07:33:37 |         MASTER-OAGH | (12h 20m 50.06s , -25d 46m 28.8s) |   C |    60 | 18.3 |        
     928 | 2022-03-06 07:34:58 |         MASTER-OAGH | (12h 04m 50.53s , -33d 01m 20.5s) |   C |    60 | 18.2 |        
     928 | 2022-03-06 07:34:58 |         MASTER-OAGH | (12h 05m 19.99s , -33d 23m 20.3s) |   C |    60 | 18.6 |        
    1009 | 2022-03-06 07:36:19 |         MASTER-OAGH | (11h 58m 26.46s , -27d 19m 12.1s) |   C |    60 | 17.5 |        
    1009 | 2022-03-06 07:36:19 |         MASTER-OAGH | (11h 58m 52.45s , -27d 41m 27.5s) |   C |    60 | 18.5 |        
    1091 | 2022-03-06 07:37:41 |         MASTER-OAGH | (12h 02m 43.18s , -34d 53m 45.0s) |   C |    60 | 17.4 |        
    1091 | 2022-03-06 07:37:41 |         MASTER-OAGH | (12h 03m 13.70s , -35d 15m 44.2s) |   C |    60 | 18.1 |        
    1172 | 2022-03-06 07:39:02 |         MASTER-OAGH | (12h 43m 13.89s , -31d 06m 55.7s) |   C |    60 | 18.0 |        
    1172 | 2022-03-06 07:39:02 |         MASTER-OAGH | (12h 43m 42.95s , -31d 29m 16.3s) |   C |    60 | 18.4 |        
    1253 | 2022-03-06 07:40:23 |         MASTER-OAGH | (12h 37m 12.99s , -25d 23m 18.3s) |   C |    60 | 17.4 |        
    1253 | 2022-03-06 07:40:23 |         MASTER-OAGH | (12h 37m 38.68s , -25d 45m 55.4s) |   C |    60 | 18.2 |        
    1335 | 2022-03-06 07:41:45 |         MASTER-OAGH | (12h 25m 27.29s , -31d 06m 12.6s) |   C |    60 | 17.6 |        
    1335 | 2022-03-06 07:41:45 |         MASTER-OAGH | (12h 25m 55.73s , -31d 28m 30.2s) |   C |    60 | 18.1 |        
Filter C is a clear (unfiltred) band. 


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