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GCN Circular 30931

Subject
Fermi trigger No 655646385: Global MASTER-Net observations report
Date
2021-10-11T17:45:47Z (3 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@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-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 GRB211011.50 (trigger No 655646385,21h 43m 00.00s , +20d 11m 24.0s, R=17.79) errorbox  17292 sec after notice time and 17329 sec after trigger time at 2021-10-11 16:48:29 UT, with upper limit up to  18.2 mag. The observations began at zenith distance = 38 deg. The sun  altitude  is -25.0 deg. 

The galactic latitude b = -25 deg., longitude l = 75 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1748556

We obtain a following upper limits.  

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

    5179 | 2021-10-11 13:25:47 |             MASTER- | (22h 54m 22.51s , +31d 29m 49.1s) |   C |    25 | 13.9 |        
    5179 | 2021-10-11 13:25:47 |             MASTER- | (22h 56m 22.54s , +30d 18m 30.9s) |   C |    25 | 17.7 |        
    5213 | 2021-10-11 13:26:20 |             MASTER- | (22h 54m 22.60s , +31d 30m 04.3s) |   C |    25 | 13.9 |        
    5213 | 2021-10-11 13:26:20 |             MASTER- | (22h 56m 22.40s , +30d 18m 31.1s) |   C |    25 | 17.9 |        
    5249 | 2021-10-11 13:26:57 |             MASTER- | (22h 54m 22.50s , +31d 29m 03.3s) |   C |    25 | 13.4 |        
    5249 | 2021-10-11 13:26:57 |             MASTER- | (22h 56m 22.29s , +30d 17m 42.6s) |   C |    25 | 17.7 |        
   17419 | 2021-10-11 16:48:29 |   MASTER-Kislovodsk | (21h 52m 27.20s , +06d 30m 16.1s) |   C |   180 | 17.5 |        
   17419 | 2021-10-11 16:48:30 |   MASTER-Kislovodsk | (21h 52m 39.32s , +06d 05m 08.4s) |   C |   180 | 17.9 |        
   17948 | 2021-10-11 16:57:18 |   MASTER-Kislovodsk | (21h 52m 26.61s , +06d 31m 14.3s) |   C |   180 | 17.5 |        
   17948 | 2021-10-11 16:57:19 |   MASTER-Kislovodsk | (21h 52m 38.02s , +06d 06m 07.9s) |   C |   180 | 18.0 |        
   18407 | 2021-10-11 17:04:57 |   MASTER-Kislovodsk | (21h 52m 32.54s , +06d 30m 27.3s) |   C |   180 | 17.7 |        
   18407 | 2021-10-11 17:04:57 |   MASTER-Kislovodsk | (21h 52m 44.56s , +06d 05m 14.7s) |   C |   180 | 18.2 |        
Filter C is a clear (unfiltred) band. 


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