TITLE:   GCN CIRCULAR
NUMBER:  31352
SUBJECT: Swift GRB220101.22: Global MASTER-Net observations report 
DATE:    22/01/01 14:56:30 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) was pointed to the Swift GRB220101.22 (trigger No 1091527,00h 05m 31.20s , +31d 45m 10.8s, R=0.05) errorbox  33798 sec after notice time and 33819 sec after trigger time at 2022-01-01 14:33:51 UT, with upper limit up to  17.0 mag. Observations started at twilight.  The observations began at zenith distance = 11 deg. The sun  altitude  is -8.5 deg. 

The galactic latitude b = -30 deg., longitude l = 112 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1834316

We obtain a following upper limits.  

Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

   33910 |   MASTER-Kislovodsk |   C |   180 | 14.5 |        
   34191 |   MASTER-Kislovodsk |   C |   180 | 16.1 |        
   34191 |   MASTER-Kislovodsk |   C |   180 | 16.8 |        
   34472 |   MASTER-Kislovodsk |   C |   180 | 16.3 |        
   34472 |   MASTER-Kislovodsk |   C |   180 | 17.0 |        
Filter C is a clear (unfiltred) band. 


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