TITLE:   GCN CIRCULAR
NUMBER:  31579
SUBJECT: Fermi GRB 220211B: Global MASTER-Net observations report 
DATE:    22/02/11 16:30:20 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-Kislovodsk robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB 220211B ( Fermi GBM team, GCN 31578) errorbox  288 sec after notice time and 320 sec after trigger time at 2022-02-11 15:51:48 UT, with upper limit up to  16.9 mag. Observations started at twilight.  The observations began at zenith distance = 43 deg. The sun  altitude  is -14.3 deg. 

The galactic latitude b = -16 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=1879384

We obtain a following upper limits.  

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

     350 | 2022-02-11 15:51:48 |   MASTER-Kislovodsk | (00h 00m 04.54s , +44d 53m 56.1s) |   C |    60 | 16.8 |        
     350 | 2022-02-11 15:51:49 |   MASTER-Kislovodsk | (23h 53m 54.19s , +45d 16m 03.2s) |   C |    60 | 14.9 |        
     430 | 2022-02-11 15:53:09 |   MASTER-Kislovodsk | (00h 00m 04.28s , +43d 00m 53.6s) |   C |    60 | 16.7 |        
     430 | 2022-02-11 15:53:09 |   MASTER-Kislovodsk | (23h 54m 06.65s , +43d 23m 02.3s) |   C |    60 | 15.1 |        
    1713 | 2022-02-11 16:14:31 |   MASTER-Kislovodsk | (23h 59m 58.26s , +44d 52m 36.2s) |   C |    60 | 16.8 |        
    1713 | 2022-02-11 16:14:31 |   MASTER-Kislovodsk | (23h 53m 59.23s , +45d 14m 45.9s) |   C |    60 | 14.3 |        
    1793 | 2022-02-11 16:15:51 |   MASTER-Kislovodsk | (00h 00m 01.37s , +42d 59m 43.9s) |   C |    60 | 16.9 |        
    1793 | 2022-02-11 16:15:52 |   MASTER-Kislovodsk | (23h 54m 14.60s , +43d 21m 52.8s) |   C |    60 | 14.2 |        
Filter C is a clear (unfiltred) band. 


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