TITLE:   GCN CIRCULAR
NUMBER:  32507
SUBJECT: Fermi  trigger No 683654200: Global MASTER-Net observations report 
DATE:    22/09/01 03:30:13 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 GRB220831.66 (trigger No 683654200,22h 27m 57.60s , -47d 33m 00.0s, R=8.64) errorbox  12305 sec after notice time and 40531 sec after trigger time at 2022-09-01 03:12:06 UT, with upper limit up to  19.0 mag. The observations began at zenith distance = 56 deg. The sun  altitude  is -22.8 deg. 

The galactic latitude b = -56 deg., longitude l = 347 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2074317

We obtain a following upper limits.  

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

   40561 | 2022-09-01 03:12:06 |         MASTER-SAAO | (22h 17m 39.19s , -48d 13m 57.6s) |   C |    60 | 17.6 |        
   40641 | 2022-09-01 03:13:26 |         MASTER-SAAO | (22h 29m 40.98s , -48d 13m 25.0s) |   C |    60 | 18.8 |        
   40731 | 2022-09-01 03:14:56 |         MASTER-SAAO | (22h 14m 26.88s , -46d 20m 43.6s) |   C |    60 | 18.7 |        
   40811 | 2022-09-01 03:16:16 |         MASTER-SAAO | (22h 26m 10.09s , -46d 20m 57.1s) |   C |    60 | 18.9 |        
   40903 | 2022-09-01 03:17:48 |         MASTER-SAAO | (22h 22m 40.48s , -50d 08m 50.7s) |   C |    60 | 18.9 |        
   40994 | 2022-09-01 03:19:19 |         MASTER-SAAO | (22h 35m 13.82s , -50d 07m 47.7s) |   C |    60 | 19.0 |        
   41074 | 2022-09-01 03:20:39 |         MASTER-SAAO | (22h 40m 31.66s , -48d 13m 37.4s) |   C |    60 | 18.9 |        
   41165 | 2022-09-01 03:22:09 |         MASTER-SAAO | (22h 52m 39.32s , -48d 15m 04.3s) |   C |    60 | 18.6 |        
   41244 | 2022-09-01 03:23:29 |         MASTER-SAAO | (22h 36m 36.98s , -46d 21m 11.7s) |   C |    60 | 18.3 |        
   41335 | 2022-09-01 03:25:00 |         MASTER-SAAO | (22h 48m 10.90s , -46d 19m 54.6s) |   C |    60 | 14.4 |        
Filter C is a clear (unfiltred) band. 


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