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GCN Circular 28704

Subject
Fermi GRB 201020B: Global MASTER-Net observations report
Date
2020-10-20T19:30:28Z (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-Tavrida robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the Fermi GRB 201020B ( Fermi GBM team, GCN 28702) errorbox  116 sec after notice time and 145 sec after trigger time at 2020-10-20 17:36:19 UT, with upper limit up to  19.0 mag. The observations began at zenith distance = 51 deg. The sun  altitude  is -30.3 deg. 

The galactic latitude b = 20 deg., longitude l = 135 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1465475

We obtain a following upper limits.  

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

     160 | 2020-10-20 17:36:19 |      MASTER-Tavrida | (05h 02m 15.44s , +77d 01m 50.6s) |   C |    30 | 18.1 |        
     205 | 2020-10-20 17:36:19 |      MASTER-Tavrida | (05h 02m 15.47s , +77d 01m 50.6s) |   C |   120 | 19.0 |  Coadd 
     216 | 2020-10-20 17:37:09 |      MASTER-Tavrida | (05h 02m 09.73s , +77d 00m 53.6s) |   C |    40 | 18.4 |        
     281 | 2020-10-20 17:38:10 |      MASTER-Tavrida | (05h 02m 16.10s , +77d 01m 14.1s) |   C |    50 | 18.4 |        
     356 | 2020-10-20 17:39:20 |      MASTER-Tavrida | (05h 02m 11.94s , +77d 02m 41.5s) |   C |    60 | 18.5 |        
     447 | 2020-10-20 17:40:41 |      MASTER-Tavrida | (05h 02m 11.08s , +77d 01m 36.7s) |   C |    80 | 18.7 |        
     557 | 2020-10-20 17:42:21 |      MASTER-Tavrida | (04h 48m 10.21s , +76d 33m 54.4s) |   C |   100 | 18.8 |        
     688 | 2020-10-20 17:44:21 |      MASTER-Tavrida | (04h 48m 02.35s , +76d 33m 21.4s) |   C |   120 | 18.9 |        
     843 | 2020-10-20 17:46:42 |      MASTER-Tavrida | (04h 48m 00.81s , +76d 34m 32.4s) |   C |   150 | 18.6 |        
    1029 | 2020-10-20 17:49:33 |      MASTER-Tavrida | (04h 48m 05.91s , +76d 33m 45.8s) |   C |   180 | 18.6 |        
    1230 | 2020-10-20 17:52:54 |      MASTER-Tavrida | (04h 47m 57.59s , +76d 33m 01.0s) |   C |   180 | 18.6 |        
    1431 | 2020-10-20 17:56:14 |      MASTER-Tavrida | (04h 48m 03.67s , +76d 33m 39.0s) |   C |   180 | 18.6 |        
    1631 | 2020-10-20 17:59:35 |      MASTER-Tavrida | (04h 47m 58.81s , +76d 35m 03.2s) |   C |   180 | 18.6 |        
    1772 | 2020-10-20 18:02:56 |      MASTER-Tavrida | (04h 50m 47.49s , +78d 02m 09.0s) |   C |    60 | 18.6 |        
    1852 | 2020-10-20 18:04:16 |      MASTER-Tavrida | (04h 09m 27.94s , +76d 03m 59.8s) |   C |    60 | 18.8 |        
    2013 | 2020-10-20 18:06:57 |      MASTER-Tavrida | (05h 15m 54.03s , +76d 01m 47.7s) |   C |    60 | 18.6 |        
    4831 | 2020-10-20 18:53:55 |      MASTER-Tavrida | (04h 50m 27.27s , +78d 03m 32.9s) |   C |    60 | 18.3 |        
    4912 | 2020-10-20 18:55:16 |      MASTER-Tavrida | (05h 29m 10.28s , +78d 03m 58.0s) |   C |    60 | 18.6 |        
    4992 | 2020-10-20 18:56:36 |      MASTER-Tavrida | (04h 09m 07.67s , +76d 04m 40.5s) |   C |    60 | 18.7 |        
    5073 | 2020-10-20 18:57:56 |      MASTER-Tavrida | (04h 42m 20.94s , +76d 05m 39.8s) |   C |    60 | 18.7 |        
    5233 | 2020-10-20 19:00:37 |      MASTER-Tavrida | (05h 01m 52.50s , +80d 03m 12.9s) |   C |    60 | 18.9 |        
    5315 | 2020-10-20 19:01:58 |      MASTER-Tavrida | (05h 15m 37.60s , +76d 03m 36.6s) |   C |    60 | 18.7 |        
    5814 | 2020-10-20 19:10:18 |      MASTER-Tavrida | (05h 29m 01.57s , +78d 05m 11.8s) |   C |    60 | 18.4 |        
    5895 | 2020-10-20 19:11:38 |      MASTER-Tavrida | (04h 42m 17.73s , +76d 04m 03.6s) |   C |    60 | 18.6 |        
    6260 | 2020-10-20 19:17:44 |      MASTER-Tavrida | (04h 36m 28.16s , +74d 04m 22.2s) |   C |    60 | 18.6 |        
Filter C is a clear (unfiltred) band. 


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