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GCN Circular 30777

Subject
Fermi trigger No 652585475: Global MASTER-Net observations report
Date
2021-09-06T04:30:15Z (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-OAFA robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Argentina (OAFA observatory of San Juan National University) started inspect of the Fermi GRB210906.07 (trigger No 652585475,19h 55m 14.40s , +14d 49m 12.0s, R=7.64) errorbox 60 sec after trigger time at 2021-09-06 01:45:31 UT, with upper limit up to  18.1 mag. The observations began at zenith distance = 50 deg. The sun  altitude  is -43.8 deg. 

The galactic latitude b = -7 deg., longitude l = 54 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1710664

We obtain a following upper limits.  

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

      66 | 2021-09-06 01:45:31 |         MASTER-OAFA | (19h 34m 23.16s , +18d 02m 51.1s) |   C |    10 | 16.7 |        
      96 | 2021-09-06 01:46:01 |         MASTER-OAFA | (19h 34m 23.04s , +18d 01m 30.0s) |   C |    10 | 16.7 |        
     138 | 2021-09-06 01:46:38 |         MASTER-OAFA | (19h 34m 26.23s , +18d 03m 03.9s) |   C |    20 | 17.1 |        
     183 | 2021-09-06 01:47:17 |         MASTER-OAFA | (19h 34m 20.37s , +18d 02m 21.3s) |   C |    30 | 17.3 |        
     237 | 2021-09-06 01:48:07 |         MASTER-OAFA | (19h 34m 19.98s , +18d 03m 24.0s) |   C |    40 | 17.2 |        
     302 | 2021-09-06 01:49:06 |         MASTER-OAFA | (19h 34m 24.93s , +18d 02m 25.9s) |   C |    50 | 17.3 |        
     376 | 2021-09-06 01:50:16 |         MASTER-OAFA | (19h 34m 19.45s , +18d 01m 28.1s) |   C |    60 | 17.4 |        
     456 | 2021-09-06 01:51:35 |         MASTER-OAFA | (19h 22m 52.17s , +17d 34m 49.7s) |   C |    60 | 18.1 |        
     535 | 2021-09-06 01:52:55 |         MASTER-OAFA | (19h 31m 17.75s , +17d 33m 03.8s) |   C |    60 | 17.7 |        
     614 | 2021-09-06 01:54:14 |         MASTER-OAFA | (19h 36m 22.73s , +19d 27m 40.5s) |   C |    60 | 17.4 |        
     695 | 2021-09-06 01:55:35 |         MASTER-OAFA | (19h 44m 55.48s , +19d 28m 28.6s) |   C |    60 | 16.7 |        
     775 | 2021-09-06 01:56:55 |         MASTER-OAFA | (19h 47m 21.87s , +13d 44m 25.2s) |   C |    60 | 16.8 |        
     855 | 2021-09-06 01:58:14 |         MASTER-OAFA | (19h 55m 43.92s , +13d 44m 38.9s) |   C |    60 | 17.3 |        
     934 | 2021-09-06 01:59:34 |         MASTER-OAFA | (19h 53m 30.61s , +11d 50m 41.9s) |   C |    60 | 17.3 |        
    1014 | 2021-09-06 02:00:53 |         MASTER-OAFA | (20h 01m 45.48s , +11d 52m 00.6s) |   C |    60 | 17.4 |        
    1097 | 2021-09-06 02:02:16 |         MASTER-OAFA | (19h 42m 28.83s , +15d 40m 35.2s) |   C |    60 | 16.8 |        
    1379 | 2021-09-06 02:06:59 |         MASTER-OAFA | (19h 50m 48.92s , +15d 38m 08.3s) |   C |    60 | 16.9 |        
    1458 | 2021-09-06 02:08:18 |         MASTER-OAFA | (19h 22m 55.24s , +17d 33m 07.8s) |   C |    60 | 17.9 |        
    1538 | 2021-09-06 02:09:38 |         MASTER-OAFA | (19h 31m 17.59s , +17d 34m 42.1s) |   C |    60 | 17.2 |        
    1620 | 2021-09-06 02:10:59 |         MASTER-OAFA | (19h 36m 26.55s , +19d 27m 01.8s) |   C |    60 | 17.1 |        
    1699 | 2021-09-06 02:12:19 |         MASTER-OAFA | (19h 45m 00.79s , +19d 28m 01.0s) |   C |    60 | 16.7 |        
    1781 | 2021-09-06 02:13:41 |         MASTER-OAFA | (19h 47m 21.11s , +13d 45m 24.0s) |   C |    60 | 16.9 |        
    1861 | 2021-09-06 02:15:00 |         MASTER-OAFA | (19h 55m 37.78s , +13d 46m 12.3s) |   C |    60 | 17.5 |        
    1940 | 2021-09-06 02:16:20 |         MASTER-OAFA | (19h 53m 33.52s , +11d 51m 15.2s) |   C |    60 | 17.4 |        
    2020 | 2021-09-06 02:17:39 |         MASTER-OAFA | (20h 01m 39.34s , +11d 50m 04.2s) |   C |    60 | 17.5 |        
    2099 | 2021-09-06 02:18:58 |         MASTER-OAFA | (19h 42m 34.13s , +15d 39m 04.9s) |   C |    60 | 16.8 |        
    2179 | 2021-09-06 02:20:18 |         MASTER-OAFA | (19h 58m 22.37s , +15d 38m 15.1s) |   C |    60 | 17.3 |        
    2258 | 2021-09-06 02:21:38 |         MASTER-OAFA | (20h 06m 45.85s , +15d 39m 34.6s) |   C |    60 | 17.4 |        
    2338 | 2021-09-06 02:22:57 |         MASTER-OAFA | (19h 50m 48.25s , +15d 39m 24.2s) |   C |    60 | 16.8 |        
    2417 | 2021-09-06 02:24:17 |         MASTER-OAFA | (19h 22m 49.45s , +17d 35m 08.4s) |   C |    60 | 17.9 |        
    2497 | 2021-09-06 02:25:36 |         MASTER-OAFA | (19h 31m 20.50s , +17d 33m 55.0s) |   C |    60 | 17.6 |        
    2576 | 2021-09-06 02:26:56 |         MASTER-OAFA | (19h 36m 22.91s , +19d 26m 49.0s) |   C |    60 | 17.3 |        
    2656 | 2021-09-06 02:28:15 |         MASTER-OAFA | (19h 45m 00.76s , +19d 26m 50.7s) |   C |    60 | 16.7 |        
    2738 | 2021-09-06 02:29:38 |         MASTER-OAFA | (19h 47m 24.75s , +13d 46m 12.2s) |   C |    60 | 16.9 |        
    2818 | 2021-09-06 02:30:57 |         MASTER-OAFA | (19h 55m 40.64s , +13d 44m 33.0s) |   C |    60 | 17.5 |        
    2897 | 2021-09-06 02:32:17 |         MASTER-OAFA | (19h 53m 33.45s , +11d 52m 05.4s) |   C |    60 | 17.2 |        
    2977 | 2021-09-06 02:33:36 |         MASTER-OAFA | (20h 01m 38.24s , +11d 51m 01.4s) |   C |    60 | 17.6 |        
    3056 | 2021-09-06 02:34:56 |         MASTER-OAFA | (19h 42m 27.84s , +15d 40m 33.0s) |   C |    60 | 16.9 |        
    3136 | 2021-09-06 02:36:15 |         MASTER-OAFA | (19h 58m 26.28s , +15d 39m 09.7s) |   C |    60 | 17.5 |        
    3217 | 2021-09-06 02:37:36 |         MASTER-OAFA | (20h 06m 39.00s , +15d 37m 58.4s) |   C |    60 | 17.6 |        
    3296 | 2021-09-06 02:38:56 |         MASTER-OAFA | (19h 50m 55.03s , +15d 38m 48.9s) |   C |    60 | 17.1 |        
    3376 | 2021-09-06 02:40:16 |         MASTER-OAFA | (20h 03m 06.62s , +13d 44m 25.0s) |   C |    60 | 17.7 |        
    3456 | 2021-09-06 02:41:35 |         MASTER-OAFA | (20h 11m 26.19s , +13d 45m 47.6s) |   C |    60 | 17.6 |        
    3535 | 2021-09-06 02:42:55 |         MASTER-OAFA | (19h 37m 53.15s , +11d 52m 36.9s) |   C |    60 | 16.4 |        
Filter C is a clear (unfiltred) band. 


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