TITLE:   GCN CIRCULAR
NUMBER:  32225
SUBJECT: Fermi  trigger No 677236224: Global MASTER-Net observations report 
DATE:    22/06/19 08:30:32 GMT
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 GRB220618.38 (trigger No 677236224,01h 32m 02.40s , +55d 50m 24.0s, R=2.7) errorbox  5264 sec after notice time and 83452 sec after trigger time at 2022-06-19 08:21:11 UT, with upper limit up to  17.1 mag. The observations began at zenith distance = 68 deg. The sun  altitude  is -33.6 deg. 

The galactic latitude b = -6 deg., longitude l = 129 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2010160

We obtain a following upper limits.  

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

   83482 | 2022-06-19 08:21:11 |         MASTER-OAGH | (01h 15m 43.85s , +55d 55m 15.4s) |   C |    60 | 17.1 |        
   83482 | 2022-06-19 08:21:11 |         MASTER-OAGH | (01h 15m 04.70s , +56d 20m 04.7s) |   C |    60 | 17.0 |        
   83564 | 2022-06-19 08:22:33 |         MASTER-OAGH | (01h 29m 28.40s , +56d 17m 41.9s) |   C |    60 | 15.1 |        
   83564 | 2022-06-19 08:22:33 |         MASTER-OAGH | (01h 30m 08.91s , +55d 53m 27.2s) |   C |    60 | 15.1 |        
Filter C is a clear (unfiltred) band. 


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