TITLE:   GCN CIRCULAR
NUMBER:  31311
SUBJECT: Fermi  trigger No 662216114: Global MASTER-Net observations report 
DATE:    21/12/26 16:00:18 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-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 GRB211226.54 (trigger No 662216114,19h 34m 43.92s , +13d 27m 00.0s, R=26.3) errorbox  6572 sec after notice time and 6583 sec after trigger time at 2021-12-26 14:44:52 UT, with upper limit up to  16.0 mag. Observations started at twilight.  The observations began at zenith distance = 45 deg. The sun  altitude  is -11.1 deg. 

The galactic latitude b = -4 deg., longitude l = 50 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1827885

We obtain a following upper limits.  

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

    6673 | 2021-12-26 14:44:52 |   MASTER-Kislovodsk | (21h 05m 17.69s , +16d 23m 00.5s) |   C |   180 | 15.7 |        
    7615 | 2021-12-26 15:01:34 |   MASTER-Kislovodsk | (19h 12m 10.13s , +04d 56m 30.0s) |   C |    60 | 13.2 |        
    7615 | 2021-12-26 15:01:34 |   MASTER-Kislovodsk | (19h 12m 21.63s , +05d 19m 60.0s) |   C |    60 | 14.1 |        
    7755 | 2021-12-26 15:02:54 |   MASTER-Kislovodsk | (21h 05m 40.77s , +15d 56m 56.9s) |   C |   180 | 15.4 |        
    7755 | 2021-12-26 15:02:54 |   MASTER-Kislovodsk | (21h 05m 41.11s , +16d 20m 49.3s) |   C |   180 | 16.0 |        
    8036 | 2021-12-26 15:07:35 |   MASTER-Kislovodsk | (21h 05m 43.70s , +15d 56m 20.1s) |   C |   180 | 15.6 |        
    8036 | 2021-12-26 15:07:35 |   MASTER-Kislovodsk | (21h 05m 44.10s , +16d 20m 11.6s) |   C |   180 | 16.0 |        
Filter C is a clear (unfiltred) band. 


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