TITLE:   GCN CIRCULAR
NUMBER:  32623
SUBJECT: Fermi  trigger No 686588176: Global MASTER-Net observations report 
DATE:    22/10/04 18:30:23 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-Tunka robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Applied Physics Institute, Irkutsk State University) started inspect of the Fermi GRB221004.62 (trigger No 686588176,23h 35m 33.60s , +62d 07m 48.0s, R=11.38) errorbox  10866 sec after notice time and 10900 sec after trigger time at 2022-10-04 17:57:51 UT, with upper limit up to  17.9 mag. The observations began at zenith distance = 18 deg. The sun  altitude  is -41.6 deg. 

The galactic latitude b =  1 deg., longitude l = 115 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2109858

We obtain a following upper limits.  

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

   10930 | 2022-10-04 17:57:51 |        MASTER-Tunka | (00h 12m 57.26s , +65d 13m 57.6s) |   C |    60 | 17.9 |        
   11001 | 2022-10-04 17:59:02 |        MASTER-Tunka | (00h 04m 55.64s , +61d 24m 37.1s) |   C |    60 | 16.8 |        
   11072 | 2022-10-04 18:00:13 |        MASTER-Tunka | (23h 54m 37.53s , +65d 11m 30.2s) |   C |    60 | 17.4 |        
   11151 | 2022-10-04 18:01:32 |        MASTER-Tunka | (23h 55m 35.92s , +61d 25m 13.6s) |   C |    60 | 16.8 |        
Filter C is a clear (unfiltred) band. 


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