TITLE:   GCN CIRCULAR
NUMBER:  31562
SUBJECT: Fermi GRB 220209A: Global MASTER-Net observations report 
DATE:    22/02/10 10:00:18 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, T.Pogrosheva, E.Minkina,
A.Chasovnikov, V.Topolev, V.Grinshpun, D.Kuvshinov,  D. Cheryasov
(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),

B.L.Carrasco, J.R.Valdes,V.Chavushyan, C.J.Martinez, V.M.Patino Alvarez,
M.L.H.Rodriguez (INAOE, OAGH)

A. Tlatov, D. Dormidontov 
(Kislovodsk Solar Station of the Pulkovo Observatory),

A. Gabovich, V.Yurkov 
(Blagoveschensk Educational State University)


MASTER-IAC robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Spain (IAC Teide Observatory) started inspect of the Fermi GRB 220209A ( Fermi GBM team, GCN 31561) errorbox  28670 sec after notice time and 28704 sec after trigger time at 2022-02-10 06:59:14 UT, with upper limit up to  13.9 mag. Observations started at twilight.  The observations began at zenith distance = 75 deg. The sun  altitude  is -10.6 deg. 

MASTER-Amur robotic telescope  located in Russia (Blagoveshchensk State Pedagogical University) started inspect of the Fermi GRB 220209A errorbox  38592 sec after notice time and 38625 sec after trigger time at 2022-02-10 09:44:35 UT, with upper limit up to  14.6 mag. Observations started at twilight.  The observations began at zenith distance = 37 deg. The sun  altitude  is -10.9 deg. 

The galactic latitude b = 10 deg., longitude l = 117 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1876477

We obtain a following upper limits.  

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

   28734 | 2022-02-10 06:59:14 |          MASTER-IAC | (23h 47m 25.56s , +69d 30m 47.3s) |   C |    60 | 13.9 |        
   38656 | 2022-02-10 09:44:35 |         MASTER-Amur | (23h 01m 26.56s , +71d 09m 13.9s) |   C |    60 | 14.3 |        
   38735 | 2022-02-10 09:45:55 |         MASTER-Amur | (23h 26m 44.90s , +71d 10m 06.6s) |   C |    60 | 14.6 |        
   38815 | 2022-02-10 09:47:15 |         MASTER-Amur | (23h 49m 22.42s , +71d 09m 55.0s) |   C |    60 | 14.6 |        
Filter C is a clear (unfiltred) band. 


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