TITLE:   GCN CIRCULAR
NUMBER:  32452
SUBJECT: Fermi  trigger No 681719116: Global MASTER-Net observations report 
DATE:    22/08/09 17:30:11 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 GRB220809.27 (trigger No 681719116,08h 08m 55.20s , -41d 04m 48.0s, R=18.84) errorbox  37978 sec after notice time and 38009 sec after trigger time at 2022-08-09 16:58:40 UT, with upper limit up to  17.0 mag. Observations started at twilight.  The observations began at zenith distance = 76 deg. The sun  altitude  is -11.3 deg. 

The galactic latitude b = -4 deg., longitude l = 258 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2052718

We obtain a following upper limits.  

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

   38099 | 2022-08-09 16:58:40 |         MASTER-SAAO | (08h 48m 19.75s , -42d 30m 56.7s) |   C |   180 | 16.4 |        
   38256 | 2022-08-09 17:02:17 |         MASTER-SAAO | (08h 49m 34.24s , -42d 16m 46.3s) |   C |    60 | 16.0 |        
   38336 | 2022-08-09 17:03:37 |         MASTER-SAAO | (09h 00m 22.49s , -42d 17m 50.2s) |   C |    60 | 17.0 |        
   39224 | 2022-08-09 17:18:25 |         MASTER-SAAO | (08h 49m 34.99s , -42d 17m 53.8s) |   C |    60 | 16.0 |        
   39315 | 2022-08-09 17:19:57 |         MASTER-SAAO | (09h 00m 29.39s , -42d 17m 29.8s) |   C |    60 | 16.8 |        
Filter C is a clear (unfiltred) band. 


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