TITLE:   GCN CIRCULAR
NUMBER:  32280
SUBJECT: Fermi GRB 220627A: Global MASTER-Net observations report 
DATE:    22/06/27 22:00:31 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-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 220627A ( Fermi GBM team, GCN 32278) errorbox  579 sec after notice time and 592 sec after trigger time at 2022-06-27 21:30:52 UT, with upper limit up to  19.9 mag. The observations began at zenith distance = 39 deg. The sun  altitude  is -72.1 deg. 

The galactic latitude b = 25 deg., longitude l = 320 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2016919

We obtain a following upper limits.  

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

     653 | 2022-06-27 21:30:52 |         MASTER-SAAO | (14h 04m 14.66s , -35d 01m 06.7s) |   C |   120 | 19.9 |        
     802 | 2022-06-27 21:33:12 |         MASTER-SAAO | (14h 04m 12.35s , -34d 59m 11.6s) |   C |   140 | 19.9 |        
    1231 | 2022-06-27 21:41:01 |         MASTER-SAAO | (14h 06m 01.84s , -34d 45m 29.2s) |   C |    60 | 19.5 |        
Filter C is a clear (unfiltred) band. 


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