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GCN Circular 31216

Subject
Swift GRB 211211A: Global MASTER-Net observations report
Date
2021-12-12T13:10:09Z (2 years ago)
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) was pointed to the Swift GRB 211211A ( A. D'Ai et al., GCN 31202) errorbox  29687 sec after notice time and 29621 sec after trigger time at 2021-12-11 21:25:00 UT, with upper limit up to  13.5 mag. The observations began at zenith distance = 39 deg. The sun  altitude  is -17.3 deg. 

MASTER-Kislovodsk robotic telescope  located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) was pointed to the Swift GRB 211211A errorbox  35200 sec after notice time and 35135 sec after trigger time at 2021-12-11 22:56:53 UT, with upper limit up to  19.1 mag. The observations began at zenith distance = 80 deg. The sun  altitude  is -59.4 deg. 

MASTER-Tavrida robotic telescope  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) was pointed to the Swift GRB 211211A errorbox  37423 sec after notice time and 37358 sec after trigger time at 2021-12-11 23:33:56 UT, with upper limit up to  17.2 mag. The observations began at zenith distance = 79 deg. The sun  altitude  is -58.1 deg. 

MASTER-IAC robotic telescope  located in Spain (IAC Teide Observatory) was pointed to the Swift GRB 211211A errorbox  52860 sec after notice time and 52795 sec after trigger time at 2021-12-12 03:51:13 UT, with upper limit up to  18.9 mag. The observations began at zenith distance = 76 deg. The sun  altitude  is -50.4 deg. 

The galactic latitude b = 72 deg., longitude l = 39 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1810696

We obtain a following upper limits.  

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

   29712 |         MASTER-Amur |   C |   180 | 13.5 |        
   35165 |   MASTER-Kislovodsk |   C |    60 | 17.4 |        
   35165 |   MASTER-Kislovodsk |   C |    60 | 17.5 |        
   35706 |   MASTER-Kislovodsk |   C |   180 | 18.0 |        
   35706 |   MASTER-Kislovodsk |   C |   180 | 18.2 |        
   36851 |   MASTER-Kislovodsk |   C |    60 | 17.4 |        
   36851 |   MASTER-Kislovodsk |   C |    60 | 17.7 |        
   37448 |      MASTER-Tavrida |   C |   180 | 17.1 |        
   37472 |   MASTER-Kislovodsk |   C |   180 | 18.3 |        
   37472 |   MASTER-Kislovodsk |   C |   180 | 18.6 |        
   38013 |   MASTER-Kislovodsk |   C |    60 | 17.5 |        
   38013 |   MASTER-Kislovodsk |   C |    60 | 18.0 |        
   38452 |      MASTER-Tavrida |   C |    60 | 17.0 |        
   39166 |      MASTER-Tavrida |   C |    60 | 17.2 |        
   39404 |      MASTER-Tavrida |   C |    60 | 17.1 |        
   40330 |      MASTER-Tavrida |   C |    60 | 15.6 |        
   40488 |      MASTER-Tavrida |   C |    60 | 15.1 |        
   40697 |   MASTER-Kislovodsk |   C |   180 | 18.3 |        
   40697 |   MASTER-Kislovodsk |   C |   180 | 18.4 |        
   41906 |      MASTER-Tavrida |   C |    60 | 12.8 |        
   41960 |   MASTER-Kislovodsk |   C |    60 | 18.0 |        
   42458 |      MASTER-Tavrida |   C |    60 | 12.2 |        
   42921 |   MASTER-Kislovodsk |   C |    60 | 18.3 |        
   43375 |      MASTER-Tavrida |   C |   180 | 13.2 |        
   43594 |      MASTER-Tavrida |   C |    60 | 12.0 |        
   43883 |   MASTER-Kislovodsk |   C |    60 | 18.3 |        
   48892 |   MASTER-Kislovodsk |   C |   180 | 18.9 |        
   48892 |   MASTER-Kislovodsk |   C |   180 | 19.1 |        
   49751 |      MASTER-Tavrida |   C |   180 | 14.4 |        
   49972 |      MASTER-Tavrida |   C |    60 | 13.9 |        
   50256 |   MASTER-Kislovodsk |   C |   180 | 18.5 |        
   50256 |   MASTER-Kislovodsk |   C |   180 | 18.5 |        
   50288 |      MASTER-Tavrida |   C |    60 | 13.2 |        
   51619 |   MASTER-Kislovodsk |   C |   180 | 16.8 |        
   51619 |   MASTER-Kislovodsk |   C |   180 | 14.5 |        
   52825 |          MASTER-IAC |   C |    60 | 16.3 |        
   52905 |          MASTER-IAC |   C |    60 | 14.0 |        
   52985 |          MASTER-IAC |   C |    60 | 17.3 |        
   54066 |      MASTER-Tavrida |   C |    60 | 15.2 |        
   54626 |          MASTER-IAC |   C |    60 | 17.4 |        
   54706 |          MASTER-IAC |   C |    60 | 17.4 |        
   54786 |          MASTER-IAC |   C |    60 | 17.6 |        
   55666 |          MASTER-IAC |   C |    60 | 17.5 |        
   55746 |          MASTER-IAC |   C |    60 | 17.9 |        
   56120 |          MASTER-IAC |   C |    60 | 17.9 |        
   59363 |          MASTER-IAC |   C |   180 | 18.7 |        
   59363 |          MASTER-IAC |   C |   180 | 18.7 |        
   60352 |          MASTER-IAC |   C |   180 | 18.9 |        
   60352 |          MASTER-IAC |   C |   180 | 18.7 |        
   61693 |          MASTER-IAC |   C |   180 | 18.9 |        
   61693 |          MASTER-IAC |   C |   180 | 18.7 |        
Filter C is a clear (unfiltred) band. 


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