TITLE:   GCN CIRCULAR
NUMBER:  31224
SUBJECT: Fermi GRB 211212A: Global MASTER-Net observations report 
DATE:    21/12/12 19:00:20 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),

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

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


MASTER-Amur robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Blagoveshchensk State Pedagogical University) started inspect of the Fermi GRB 211212A ( Fermi GBM team, GCN 31211) errorbox  21907 sec after notice time and 21915 sec after trigger time at 2021-12-12 15:33:19 UT, with upper limit up to  15.4 mag. The observations began at zenith distance = 69 deg. The sun  altitude  is -63.1 deg. 

The galactic latitude b = 35 deg., longitude l = 238 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1811480

We obtain a following upper limits.  

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

   21946 | 2021-12-12 15:33:19 |         MASTER-Amur | (09h 15m 49.56s , +01d 02m 52.5s) |   C |    60 | 15.2 |        
   22303 | 2021-12-12 15:39:16 |         MASTER-Amur | (09h 31m 47.79s , +02d 57m 44.9s) |   C |    60 | 14.7 |        
   22842 | 2021-12-12 15:48:15 |         MASTER-Amur | (09h 30m 59.57s , +01d 03m 34.5s) |   C |    60 | 14.9 |        
   22932 | 2021-12-12 15:49:45 |         MASTER-Amur | (09h 15m 45.16s , +01d 04m 23.1s) |   C |    60 | 15.4 |        
   23112 | 2021-12-12 15:52:45 |         MASTER-Amur | (09h 46m 54.10s , +02d 56m 29.7s) |   C |    60 | 14.9 |        
Filter C is a clear (unfiltred) band. 


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