[vsnet-grb-info 26984] Fermi GRB 201218A: Global MASTER-Net observations report

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  29087
SUBJECT: Fermi GRB 201218A: Global MASTER-Net observations report 
DATE:    20/12/18 19:15:25 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov at xray.sai.msu.ru>

V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, F.Balakin, 
V.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva,
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, O.Ershova 
(Irkutsk State University, API),

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

V. Yurkov, A. Gabovich, Yu. Sergienko 
(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 201218A ( Fermi GBM team, GCN 29081) errorbox  53279 sec after notice time and 53345 sec after trigger time at 2020-12-18 19:03:21 UT, with upper limit up to  16.5 mag. Observations started at twilight.  The observations began at zenith distance = 64 deg. The sun  altitude  is -11.5 deg. 

The galactic latitude b =  7 deg., longitude l = 57 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1505659

We obtain a following upper limits.  

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

   22028 | 2020-12-18 10:20:53 |             MASTER- | (19h 12m 49.70s , +21d 30m 56.1s) |   C |    60 | 15.4 |        
   23215 | 2020-12-18 10:40:41 |             MASTER- | (19h 12m 56.18s , +21d 28m 59.3s) |   C |    60 | 13.0 |        
   53435 | 2020-12-18 19:03:21 |          MASTER-IAC | (19h 01m 57.16s , +23d 55m 31.2s) |   C |   180 | 16.5 |        
Filter C is a clear (unfiltred) band. 


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