TITLE:   GCN CIRCULAR
NUMBER:  32442
SUBJECT: Fermi  trigger No 681271717: Global MASTER-Net observations report 
DATE:    22/08/04 17:15:09 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 GRB220804.09 (trigger No 681271717,10h 37m 38.40s , +09d 22m 48.0s, R=6.48) errorbox  53320 sec after notice time and 53352 sec after trigger time at 2022-08-04 16:57:45 UT, with upper limit up to  15.1 mag. Observations started at twilight.  The observations began at zenith distance = 70 deg. The sun  altitude  is -11.7 deg. 

The galactic latitude b = 54 deg., longitude l = 237 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2048705

We obtain a following upper limits.  

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

   53382 | 2022-08-04 16:57:45 |         MASTER-SAAO | (10h 59m 04.11s , +05d 11m 27.4s) |   C |    60 | 14.1 |        
   53462 | 2022-08-04 16:59:05 |         MASTER-SAAO | (11h 00m 15.05s , +10d 54m 34.5s) |   C |    60 | 13.4 |        
   53553 | 2022-08-04 17:00:35 |         MASTER-SAAO | (11h 08m 25.11s , +10d 53m 24.2s) |   C |    60 | 14.1 |        
   53635 | 2022-08-04 17:01:57 |         MASTER-SAAO | (10h 49m 35.87s , +03d 16m 49.9s) |   C |    60 | 14.3 |        
   53729 | 2022-08-04 17:03:31 |         MASTER-SAAO | (10h 57m 38.35s , +03d 16m 41.2s) |   C |    60 | 15.1 |        
   54071 | 2022-08-04 17:09:13 |         MASTER-SAAO | (11h 01m 31.19s , +07d 05m 50.9s) |   C |    60 | 13.6 |        
Filter C is a clear (unfiltred) band. 


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