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GCN Circular 32100

Subject
Fermi GRB 220523B: Global MASTER-Net observations report
Date
2022-05-24T03:30:25Z (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 220523B ( Fermi GBM team, GCN 32098) errorbox  24684 sec after notice time and 49281 sec after trigger time at 2022-05-24 03:05:29 UT, with upper limit up to  18.6 mag. Observations started at twilight.  The observations began at zenith distance = 55 deg. The sun  altitude  is -10.8 deg. 

The galactic latitude b = 24 deg., longitude l = 157 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1982098

We obtain a following upper limits.  

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

   49311 | 2022-05-24 03:05:29 |         MASTER-OAGH | (06h 58m 44.58s , +60d 04m 50.9s) |   C |    60 | 16.7 |        
   49311 | 2022-05-24 03:05:29 |         MASTER-OAGH | (06h 58m 01.41s , +60d 31m 19.2s) |   C |    60 | 16.8 |        
   49393 | 2022-05-24 03:06:51 |         MASTER-OAGH | (07h 14m 39.16s , +60d 03m 59.7s) |   C |    60 | 16.3 |        
   49393 | 2022-05-24 03:06:51 |         MASTER-OAGH | (07h 13m 57.92s , +60d 30m 10.4s) |   C |    60 | 16.5 |        
   49474 | 2022-05-24 03:08:12 |         MASTER-OAGH | (07h 04m 54.62s , +58d 11m 27.1s) |   C |    60 | 16.9 |        
   49474 | 2022-05-24 03:08:12 |         MASTER-OAGH | (07h 04m 14.95s , +58d 37m 55.5s) |   C |    60 | 17.1 |        
   49555 | 2022-05-24 03:09:33 |         MASTER-OAGH | (07h 20m 03.85s , +58d 10m 26.5s) |   C |    60 | 16.4 |        
   49555 | 2022-05-24 03:09:33 |         MASTER-OAGH | (07h 19m 25.49s , +58d 36m 42.1s) |   C |    60 | 16.8 |        
   49636 | 2022-05-24 03:10:54 |         MASTER-OAGH | (06h 35m 23.03s , +58d 37m 28.8s) |   C |    60 | 16.6 |        
   49636 | 2022-05-24 03:10:54 |         MASTER-OAGH | (06h 36m 03.81s , +58d 10m 34.2s) |   C |    60 | 16.6 |        
   49717 | 2022-05-24 03:12:15 |         MASTER-OAGH | (06h 51m 13.84s , +58d 11m 35.9s) |   C |    60 | 17.2 |        
   49717 | 2022-05-24 03:12:15 |         MASTER-OAGH | (06h 50m 34.20s , +58d 38m 21.7s) |   C |    60 | 17.3 |        
   49798 | 2022-05-24 03:13:36 |         MASTER-OAGH | (06h 51m 22.57s , +62d 24m 10.9s) |   C |    60 | 17.1 |        
   49798 | 2022-05-24 03:13:36 |         MASTER-OAGH | (06h 52m 07.32s , +61d 57m 32.8s) |   C |    60 | 16.8 |        
   49880 | 2022-05-24 03:14:58 |         MASTER-OAGH | (07h 09m 14.35s , +61d 58m 14.0s) |   C |    60 | 17.7 |        
   49880 | 2022-05-24 03:14:58 |         MASTER-OAGH | (07h 08m 30.60s , +62d 24m 31.6s) |   C |    60 | 17.7 |        
   49961 | 2022-05-24 03:16:19 |         MASTER-OAGH | (06h 28m 14.56s , +60d 03m 43.4s) |   C |    60 | 17.2 |        
   49961 | 2022-05-24 03:16:19 |         MASTER-OAGH | (06h 27m 30.84s , +60d 30m 44.1s) |   C |    60 | 17.3 |        
   50042 | 2022-05-24 03:17:40 |         MASTER-OAGH | (06h 44m 18.32s , +60d 05m 14.0s) |   C |    60 | 18.5 |        
   50042 | 2022-05-24 03:17:40 |         MASTER-OAGH | (06h 43m 35.60s , +60d 32m 05.3s) |   C |    60 | 18.1 |        
   50123 | 2022-05-24 03:19:01 |         MASTER-OAGH | (06h 43m 33.20s , +56d 17m 30.6s) |   C |    60 | 17.6 |        
   50123 | 2022-05-24 03:19:01 |         MASTER-OAGH | (06h 42m 54.88s , +56d 44m 30.3s) |   C |    60 | 17.7 |        
   50204 | 2022-05-24 03:20:22 |         MASTER-OAGH | (06h 58m 01.43s , +56d 16m 32.2s) |   C |    60 | 18.6 |        
   50204 | 2022-05-24 03:20:22 |         MASTER-OAGH | (06h 57m 24.05s , +56d 43m 24.8s) |   C |    60 | 18.2 |        
   50286 | 2022-05-24 03:21:44 |         MASTER-OAGH | (06h 58m 37.17s , +60d 03m 29.1s) |   C |    60 | 18.3 |        
   50286 | 2022-05-24 03:21:44 |         MASTER-OAGH | (06h 57m 55.35s , +60d 30m 14.7s) |   C |    60 | 18.2 |        
   50368 | 2022-05-24 03:23:06 |         MASTER-OAGH | (07h 14m 04.76s , +60d 30m 21.3s) |   C |    60 | 18.3 |        
   50368 | 2022-05-24 03:23:06 |         MASTER-OAGH | (07h 14m 45.72s , +60d 03m 52.5s) |   C |    60 | 18.2 |        
   50449 | 2022-05-24 03:24:27 |         MASTER-OAGH | (07h 04m 55.07s , +58d 11m 28.5s) |   C |    60 | 18.5 |        
   50449 | 2022-05-24 03:24:27 |         MASTER-OAGH | (07h 04m 15.84s , +58d 38m 09.6s) |   C |    60 | 18.4 |        
Filter C is a clear (unfiltred) band. 


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