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GCN Circular 29419

Subject
Fermi GRB 210207A: Global MASTER-Net observations report
Date
2021-02-07T18:45:09Z (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-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB 210207A ( Fermi GBM team, GCN 29416) errorbox  13574 sec after notice time and 13602 sec after trigger time at 2021-02-07 18:14:41 UT, with upper limit up to  19.0 mag. Observations started at twilight.  The observations began at zenith distance = 74 deg. The sun  altitude  is -8.5 deg. 

The galactic latitude b = 34 deg., longitude l = 227 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1541702

We obtain a following upper limits.  

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

   13632 | 2021-02-07 18:14:41 |         MASTER-SAAO | (09h 21m 17.86s , +03d 57m 57.2s) |   C |    60 | 14.1 |        
   13712 | 2021-02-07 18:16:01 |         MASTER-SAAO | (09h 09m 19.15s , +07d 57m 36.7s) |   C |    60 | 15.3 |        
   13891 | 2021-02-07 18:18:59 |         MASTER-SAAO | (09h 23m 02.39s , +05d 58m 05.0s) |   C |    60 | 14.8 |        
   14068 | 2021-02-07 18:21:56 |         MASTER-SAAO | (09h 04m 15.83s , +01d 58m 26.2s) |   C |    60 | 16.4 |        
   14147 | 2021-02-07 18:23:16 |         MASTER-SAAO | (09h 20m 16.34s , +01d 59m 51.9s) |   C |    60 | 16.1 |        
   14227 | 2021-02-07 18:24:36 |         MASTER-SAAO | (09h 20m 03.38s , -00d 01m 06.7s) |   C |    60 | 17.0 |        
   14307 | 2021-02-07 18:25:55 |         MASTER-SAAO | (09h 25m 24.18s , +07d 57m 54.8s) |   C |    60 | 15.8 |        
   14387 | 2021-02-07 18:27:15 |         MASTER-SAAO | (09h 05m 19.99s , +03d 57m 34.1s) |   C |    60 | 17.0 |        
   14466 | 2021-02-07 18:28:35 |         MASTER-SAAO | (09h 06m 56.83s , +05d 59m 03.6s) |   C |    60 | 17.0 |        
   14546 | 2021-02-07 18:29:55 |         MASTER-SAAO | (09h 21m 20.34s , +03d 57m 57.4s) |   C |    60 | 16.8 |        
   14626 | 2021-02-07 18:31:14 |         MASTER-SAAO | (09h 09m 19.98s , +07d 59m 20.3s) |   C |    60 | 17.4 |        
   14803 | 2021-02-07 18:34:11 |         MASTER-SAAO | (09h 22m 59.45s , +05d 59m 52.1s) |   C |    60 | 17.2 |        
   14980 | 2021-02-07 18:37:08 |         MASTER-SAAO | (09h 04m 15.52s , +01d 57m 23.0s) |   C |    60 | 18.2 |        
   15060 | 2021-02-07 18:38:28 |         MASTER-SAAO | (09h 20m 22.87s , +01d 57m 51.0s) |   C |    60 | 17.8 |        
   15139 | 2021-02-07 18:39:48 |         MASTER-SAAO | (09h 19m 59.64s , -00d 00m 23.3s) |   C |    60 | 19.0 |        
   15219 | 2021-02-07 18:41:07 |         MASTER-SAAO | (09h 25m 27.02s , +07d 58m 21.0s) |   C |    60 | 17.8 |        
Filter C is a clear (unfiltred) band. 


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